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United States Gypsum Company patents


Recent patent applications related to United States Gypsum Company. United States Gypsum Company is listed as an Agent/Assignee. Note: United States Gypsum Company may have other listings under different names/spellings. We're not affiliated with United States Gypsum Company, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "U" | United States Gypsum Company-related inventors


Self-desiccating, dimensionally-stable hydraulic cement compositions with enhanced workability

Cementitious binder compositions for cementitious products including a hydraulic cement-based reactive powder blend, an inorganic flow control agent, and a metal-based dimensional movement stabilizing agent including at least one member of the group of lithium salt and lithium base, and methods for making the cementitious binder compositions.. . ... United States Gypsum Company

Lid with hinged compartments for joint compound container

A container and lid assembly is provided, including a main container defining a chamber with a base joint compound; and a container lid constructed and arranged for closing the main container, the lid having a main hinged lid door openable to provide access to the chamber; and at least one supplemental lid door hinged to the lid and openable to a supplemental compartment, the supplemental compartment being isolated from the chamber.. . ... United States Gypsum Company

Two-hour fire-rated modular floor/ceiling assembly

A floor-ceiling assembly is provided for joined upper and lower modular construction units, including a floor surface of the upper unit using structural cement panels; a floor grid including at least one floor joist and at least one beam each having an upper surface receiving said structural cement panels, a web and a lower surface. At least one connector plate is secured to the lower surface. ... United States Gypsum Company

Fire resistant gypsum board comprising expandable graphite and related methods and slurries

Disclosed are a gypsum board, and related slurries and methods. The gypsum board comprises a gypsum layer disposed between two cover sheets. ... United States Gypsum Company

Microstructure features of gypsum wallboard made with high starch and high dispersant level

This invention provides gypsum wallboards with a unique microstructure where the walls between voids are enhanced in thickness and strength to substantially improve the strength and handling properties of the wallboards. A method of making lightweight gypsum wallboards is also provided.. ... United States Gypsum Company

Method for making a lightweight gypsum composition with internally generated foam and products made from same

A gypsum-based composition of calcium sulfate hemihydrate with (a) alum and calcium carbonate and/or (b) zeolite and sodium percarbonate for making foamed gypsum slurry. A method to make foamed gypsum slurry from the composition. ... United States Gypsum Company

One hour fire rated wooden frame members using lightweight gypsum wallboard

A combined wooden frame support and ceiling system is provided, each support including upper and lower wooden chords and a wooden structure connecting the lower chord to the upper chord for weight bearing purposes. A gypsum wallboard batten strip is attached to the lower chord, and defining a ledge extending from each side of the lower chord. ... United States Gypsum Company

Gypsum boards with polymer coating and methods for making same

A gypsum board provided with a foamed gypsum core layer, a facing sheet over the foamed gypsum core, and a latex polymer coating layer on an outer surface of the facing sheet. The latex polymer having a glass transition temperature (tg) of 0 to 35° f. ... United States Gypsum Company

Shaftwall system using folded panels, and panel

A panel for a shaftwall system includes a panel body with a core and at least one outer facing layer and an opposite backing surface. A score line is formed in the facing layer, defining two folded panel portions. ... United States Gypsum Company

Gypsum board with perforated cover sheet and system and method for manufacturing same

Embodiments of a system and a method for manufacturing a gypsum board can be used to produce a gypsum board having at least one perforated cover sheet via a cover sheet perforator system. The cover sheet perforator system can include a perforator roller is disposed downstream of a forming station along a machine direction, a roller support frame for rotatably supporting the perforator roller such that its rotational axis extends along the cross-machine direction, and a motor arranged with the perforator roller to rotate the perforator roller about the rotational axis. ... United States Gypsum Company

Magnet receptive panels and methods

Provided are building panels comprising at least one magnet receptive element, methods for making such panels, and kits and methods for attaching objects to a panel without nails or screws.. . ... United States Gypsum Company

Method of preparing pregelatinized, partially hydrolyzed starch and related methods and products

. . Disclosed are methods relating to an extruded pregelatinized, partially hydrolyzed starch prepared by mixing at least water, non-pregelatinized starch, and acid to form a starch precursor. The acid can be a weak acid that substantially avoids chelating calcium ions or a strong acid in a small amount. ... United States Gypsum Company

Continuous mixer and method of mixing reinforcing fibers with cementitious materials

A method in which a stream of dry cementitious powder passes through a first conduit and aqueous medium stream passes through a second conduit to feed a slurry mixer to make cementitious slurry. The cementitious slurry passes through a third conduit and a reinforcement fiber stream passes through a fourth conduit to feed a fiber-slurry mixer which mixes the slurry and discrete fibers to make a stream of fiber-slurry mixture. ... United States Gypsum Company

Headbox and forming station for fiber-reinforced cementitious panel production

A slurry feed apparatus for depositing a slurry upon a moving forming web having a direction of travel, including: a headbox mounted transverse to the direction of travel of the moving web, having a back wall, sidewalls, a concave transverse front wall, an open top, and an open bottom for directing slurry onto the forming web; a moveable dam releasably attached to the back wall, a seal attached to a bottom wall of the dam; and a headbox support system extending from opposed the sidewalls. Also disclosed is a continuous process for depositing a uniform layer of a cementitious slurry containing reinforcing fibers from the headbox onto a traveling web.. ... United States Gypsum Company

02/08/18 / #20180036693

Method for producing fiber reinforced cementitious slurry using a multi-stage continuous mixer

A method in which a stream of dry cementitious powder from a dry powder feeder passes through a dry cementitious powder inlet conduit to feed a first feed section of a fiber-slurry mixer. An aqueous medium stream passes through at least one aqueous medium stream conduit to feed a first mixing section the fiber-slurry mixer. ... United States Gypsum Company

02/01/18 / #20180030729

Methods for making gypsum boards with polymer coating and gypsum boards made by the method

Methods for making a gypsum board provided with a latex polymer coating layer having a sufficiently low glass transition temperature, a less dense gypsum core layer, and a relatively denser layer of gypsum between the less dense gypsum core layer and the latex polymer coating layer and a gypsum board made by the method.. . ... United States Gypsum Company

01/25/18 / #20180022653

Lightweight foamed cement, cement board, and methods for making same

Disclosed is a foamed cementitious composition which limits or eliminates aggregate, especially porous lightweight aggregate and uses a lower than usual water to cementitious composition weight ratio. The stable cementitious foam mixtures may be employed to make cement boards and other cement products. ... United States Gypsum Company

01/18/18 / #20180017510

Methods for analyzing respirable particles in bulk materials

Provided is a method for detecting respirable participles in a bulk material comprising particles. The method comprises: analyzing morphology of the particles; analyzing chemical composition of the particles; creating a profile of the particles, wherein each particle in the profile is characterized by its shape, size and chemical composition; selecting particles from the profile which match the size and chemical composition of a respirable particle; and calculating a percentage of the respirable particles in the bulk material.. ... United States Gypsum Company

01/11/18 / #20180010301

Gypsum wallboard comprising laminated multi-ply paper cover sheets bonded with a non-ionic polymeric binder and methods

Provided are wallboard panels comprising laminated multi-ply paper cover sheets bonded with a non-ionic polymeric binder and a cross-linker, and methods for making the wallboard panels.. . ... United States Gypsum Company

01/11/18 / #20180008993

Gypsum slurry application modifier

A gypsum slurry modifier device is provided for use with a gypsum mixer outlet boot having at least one tubular outlet leg, and includes a support bracket mountable to the outlet boot; at least one clamp member associated with the support bracket and constructed and arranged for engaging the at least one tubular outlet leg of the outlet boot. Each at least one clamp member is constructed and arranged for exerting a vertical compression force on the associated at least one tubular outlet leg for expanding a slurry outlet flow from the at least one leg laterally beyond an exterior surface of the leg.. ... United States Gypsum Company

01/04/18 / #20180002233

Light weight gypsum board

This invention provides low dust low density gypsum wallboard products having high total core void volumes, corresponding to low densities in the range of about 10 to 30 pcf. The wallboards have a set gypsum core formed between two substantially parallel cover sheets, the set gypsum core preferably having a total void volume from about 80% to about 92%, and made from a slurry including stucco, pregelatinized starch, and a naphthalenesulfonate dispersant. ... United States Gypsum Company

12/28/17 / #20170370112

Nonwoven joint tape having low moisture expansion properties and method for using same

The invention is directed to a joint tape for finishing a joint between boards comprising a nonwoven substrate that does not swell substantially in the presence of water. The invention further provides a method of finishing a joint between boards comprising (i) applying a joint tape of the invention to a joint between boards by embedding the joint tape in a first coat of joint compound, (ii) applying a second coat of joint compound over the tape, wherein step (ii) is carried out before the joint tape and joint compound applied in step (i) have substantially dried, and optionally (iii) applying a third fill or finish coat of joint compound over the tape, wherein step (iii) is carried out before the joint tape and second coat have substantially dried.. ... United States Gypsum Company

12/21/17 / #20170363524

System and method for manufacturing cementitious boards with on-line slurry set measurement

Embodiments of a system and a method for measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. A compression assembly can be used to compressively engage the cementitious board in a controlled manner as it passes by the compression member along the conveyor between the forming station and the cutting station. ... United States Gypsum Company

12/21/17 / #20170362477

Construction adhesive compositions

A construction adhesive composition comprises between about 10 weight percent (wt. %) and about 30 wt. ... United States Gypsum Company

12/21/17 / #20170362124

Gypsum wallboard and related methods and slurries

Disclosed is a gypsum board comprising a set gypsum core disposed between two cover sheets. The set gypsum core is formed from a slurry comprising stucco, water, and at least one pregelatinized starch having a viscosity of from about 20 cp to about 300 cp as measured according to the vma method described herein. ... United States Gypsum Company

12/21/17 / #20170361493

Slurry distribution system with vibration isolation

A cementitious slurry mixing and dispensing system includes a slurry mixer that agitates and forms aqueous cementitious slurry, a discharge conduit in communication with the mixer and forming an interior surface defining a slurry flow path to convey the slurry therethrough to an outlet, a distribution mat disposed proximally to the outlet, a vibrating plate supporting the distribution mat, an overhead bracing system from which the vibrating plate is suspended, and a plurality of support members coupled between the overhead bracing system and the vibrating plate. The vibrating plate is adapted to impart vibrational forces on the distribution mat to promote movement of the aqueous slurry. ... United States Gypsum Company

12/07/17 / #20170349492

Pourable compositions

The invention provides a pourable composition comprising calcium sulfate hemihydrate; optionally, cement; one or more anionic surfactants selected from alkyl anionic surfactants, alkyl ether anionic surfactants, alkyl aryl anionic surfactants, and combinations thereof; one or more set accelerator additives; and water.. . ... United States Gypsum Company

11/23/17 / #20170334778

Gypsum slurries with linear polycarboxylate dispersants

A gypsum slurry includes water, a hydraulic component including calcium sulfate hemihydrate and a linear polycarboxylate dispersant. The linear polycarboxylate anionic dispersant includes a first monomeric repeating unit and a second monomeric repeating unit. ... United States Gypsum Company

11/16/17 / #20170326840

Method for preparing mat-faced board

Disclosed is an improved facer mat for use as a cover sheet for gypsum board. Also disclosed are gypsum boards containing such mat facers on one or both major surfaces of the board (face and back sides when installed), a method of manufacturing such board, and a method of making the mat. ... United States Gypsum Company

11/16/17 / #20170326839

Mat-faced board

Disclosed is an improved facer mat for use as a cover sheet for gypsum board. Also disclosed are gypsum boards containing such mat facers on one or both major surfaces of the board (face and back sides when installed), a method of manufacturing such board, and a method of making the mat. ... United States Gypsum Company

11/16/17 / #20170326510

Continuous ready mix joint treatment and texture product production

A continuous ready mix joint or texture compound manufacturing system and a method for continuously manufacturing a ready mix joint or texture compound includes a continuous mixer having an inlet and an outlet, a pump disposed at the outlet of the continuous mixer, and a disperger having an inlet and an outlet. The continuous mixer is adapted to receive at least one dry ingredient and at least one wet ingredient at the inlet and continuously mix the at least one dry ingredient and the at least one wet ingredient to form a mixed composition. ... United States Gypsum Company

08/31/17 / #20170246838

Gypsum panels and methods

Provided are wallboards in which gypsum core is adhered to a paper cover sheet with an adhesive. Wallboards with laminated paper cover sheets in which an inner water-absorbent cover sheet is adhered to the outer paper cover sheet are provided as well. ... United States Gypsum Company

08/24/17 / #20170241881

System and method for evaluating joint compound specimen

Embodiments of a system and a method for evaluating a joint compound specimen can be used to determine a numerical sandability value for the specimen. A moving assembly is configured to move a sanding member in a sanding direction relative to the joint compound specimen supported in a support fixture. ... United States Gypsum Company

08/10/17 / #20170227165

Alternative core material based vacuum insulated panels

A vacuum insulated panel (vip) and a method of manufacturing a vip includes a rigid core material having high insulation and low conductivity properties. The rigid core may be made of an inorganic material that effectively mimics a porous silica core material. ... United States Gypsum Company

07/27/17 / #20170210029

Slurry distributor, system and method for using same

A slurry distribution system can include a feed conduit and a distribution conduit in fluid communication therewith. The feed conduit can include a first feed inlet and a second feed inlet disposed in spaced relationship thereto. ... United States Gypsum Company

07/06/17 / #20170189872

Constrictor valve with webbing, cementitious slurry mixing and dispensing assembly, and method for making cementitious product

A constrictor valve can be associated with a conduit in fluid communication with a mixer to control a flow of cementitious slurry discharged from the mixer through the conduit. The constrictor valve can include a constrictor housing, a webbing constriction assembly, and a drive mechanism. ... United States Gypsum Company

06/29/17 / #20170183868

Lightweight, reduced density fire rated gypsum panels

A reduced weight, reduced density gypsum panel that includes high expansion vermiculite with fire resistance capabilities that are at least comparable to (if not better than) commercial fire rated gypsum panels with a much greater gypsum content, weight and density.. . ... United States Gypsum Company

06/22/17 / #20170174571

Dimensionally stable geopolymer composition and method

A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar and repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium aluminate cement, a calcium sulfate and a chemical activator with water. ... United States Gypsum Company

06/22/17 / #20170174570

Dimensionally stable geopolymer composition and method

A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar, patching materials for road repairs and other repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium sulfoaluminate cement, a calcium sulfate and a chemical activator with water.. ... United States Gypsum Company

06/15/17 / #20170166481

Freeze-thaw durable geopolymer compositions and methods for making same

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. ... United States Gypsum Company

06/15/17 / #20170165704

Slurry distribution system and method

A slurry distributor for use in a continuous manufacturing process includes an inlet opening and a shaped duct adapted to receive a flow of slurry provided at the inlet opening. The shaped duct has a parabolic guide surface adapted to redirect the flow of slurry. ... United States Gypsum Company

06/01/17 / #20170152177

Method and system for on-line blending of foaming agent with foam modifier for addition to cementitious slurries

Disclosed is a method and system for blending a foam modifier with foaming agent online, e.g., as may be particularly useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. ... United States Gypsum Company

05/11/17 / #20170131701

System and method for manufacturing cementitious boards with on-line board measurement

Embodiments of a system and a method for continuously measuring cementitious board during the continuous manufacture thereof can be used in connection with the manufacture of various cementitious products, including gypsum wallboard, for example. Embodiments of a system and a method for continuously measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. ... United States Gypsum Company

05/11/17 / #20170129813

Low weight and density fire-resistant gypsum panel

An about ⅝ inch to ¾ inch thick low weight, low density gypsum panel with fire resistance capabilities sufficient to provide a thermal insulation index of at least 17.0 minutes which when subjected to u419 test procedures will not fail for at least 30 minutes and, in selected embodiments, also has outstanding water resistance properties.. . ... United States Gypsum Company

04/27/17 / #20170113969

Freeze-thaw durable geopolymer compositions and methods for making same

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. ... United States Gypsum Company

04/20/17 / #20170107152

Light weight gypsum fiber panel suitable for use as roof cover board

A roof cover board made from a mixture of 30-60% stucco; 20-50% perlite; 10-30% cellulose fiber; 3-20% starch; and siloxane. Also disclosed is a stucco-free roof cover board made from a mixture of 30-60% perlite, 30-60% cellulose fiber, 5-25% starch; and siloxane. ... United States Gypsum Company

04/20/17 / #20170107151

Water-resistant gypsum products and methods

This invention relates to water-resistant gypsum products manufactured with water-based emulsions comprising polymerizable siloxane compound and an anionic polyacrylamide; and methods for making a water-resistant gypsum product, comprising a step of preparing a water-based siloxane emulsion in a turbine emulsifier.. . ... United States Gypsum Company

04/06/17 / #20170096369

Foam modifiers for gypsum slurries, methods, and products

Disclosed is a foam modifier, e.g., useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. ... United States Gypsum Company

04/06/17 / #20170096366

Foam modifiers for gypsum slurries, methods, and products

Disclosed is a foam modifier, e.g., useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. ... United States Gypsum Company

04/06/17 / #20170096261

Dry joint compound in a graduated container for accurate water addition

A joint compound container including a base member having a sidewall and a bottom wall defining an interior space with an open top end where a surface of the sidewall includes an indicator. A cover is attached to the top end of the base member and a designated amount of base compound is stored in the interior space of the base member. ... United States Gypsum Company

04/06/17 / #20170095829

System and method for producing mold-resistant paper with wet scrubber assembly

Embodiments of a system and a method for preparing mold-resistant paper comprising a wet scrubber assembly in fluid communication with at least one collection plenum disposed at an operational area of a paper manufacturing line. The wet scrubber assembly can be operated to draw a stream of exhaust air from the operational area of the paper manufacturing line through the wet scrubber assembly to remove particulate from the exhaust stream. ... United States Gypsum Company

03/23/17 / #20170081842

Acoustical gypsum wallboard

This invention provides acoustical building panels and methods for imparting the acoustical property to wallboard with help of a compliant coating.. . ... United States Gypsum Company

03/23/17 / #20170081562

Drywall joint tape with dual purpose adhesive backing

A joint tape to be applied to wallboard is provided and includes a base substrate having opposing sides. In certain embodiments, a first adhesive layer is applied to one of the sides of the base substrate and a second adhesive layer is applied to the first adhesive layer, where the first adhesive layer is different than the second adhesive layer. ... United States Gypsum Company

03/16/17 / #20170073272

Pregelatinized starch with mid-range viscosity, and product, slurry and methods related thereto

Disclosed are product (e.g., panels), slurry, and methods relating to a pregelatinized starch having a mid-range viscosity (i.e., from about 20 centipoise to about 700 centipoise), and an extruded pregelatinized starch.. . ... United States Gypsum Company

03/16/17 / #20170073143

Package for delivery of additives for powdered compositions

A joint compound system is provided including a main container of base joint compound; and an additive container isolated from the base joint compound and housing at least one and preferably multiple additive packages constructed and arranged so that the additive packages are protected from exposure to moisture prior to their ultimate mixing with the base joint compound.. . ... United States Gypsum Company

03/09/17 / #20170066946

Enhanced adhesive composition for re-enforcing joints in gypsum panel construction

This invention provides flexible adhesive compositions which can be used instead of joint reinforcement tape for securing a joint seam between abutting panels. Methods using the compositions are provided as well.. ... United States Gypsum Company

03/09/17 / #20170065950

Slurry mixer gate having enhanced extractor ports

A discharge gate is provided for delivering a mixed slurry from a gypsum slurry mixer, and includes a first extractor port configured for generating a first density slurry for a first gypsum layer, and a second extractor port configured for generating a second density slurry for a second gypsum layer. A channel is defined by a front panel and a side panel of the discharge gate for delivering the first and second density slurries from the slurry mixer. ... United States Gypsum Company

02/16/17 / #20170045399

System and method for manufacuring cementitious boards with on-line void detection

Embodiments of a system and a method for detecting voids in a cementitious board can be used in connection with the manufacture of products, including cementitious board products such as gypsum wallboard, for example. Such systems and methods can be used to generate numerical void measurements based upon a series of thermal images obtained during the continuous manufacture of the cementitious board.. ... United States Gypsum Company

02/16/17 / #20170044062

Fluorescent building product and related detection method

A method of making an identifiable gypsum-based building product, includes incorporating a suitable amount of an optically identifiable marker into the product to be sensed by a conventional detecting device; applying the product with the marker in a conventional manner in the course of building construction, creating a finished building product; and analyzing the finished building product and optically detecting the presence of the marker in real time onsite.. . ... United States Gypsum Company

02/02/17 / #20170030076

Gypsum wallboard with reinforcing mesh

A wallboard panel is provided, including a sheet of face paper, a first layer of gypsum composition having a first density, a web of mesh associated with the first layer of gypsum composition, a second layer of gypsum composition having a second density, the second density being lower than the first density, and a layer of backing paper. An associated method includes providing a sheet of face paper and laying same upon a moving conveyor belt, applying a first layer of gypsum composition slurry upon the sheet of face paper, applying a web of mesh upon the first layer of gypsum composition slurry, applying a second layer of gypsum composition slurry upon the web of mesh, and applying a sheet of backing paper upon the second layer of gypsum composition slurry.. ... United States Gypsum Company

01/26/17 / #20170022104

Apparatus and methods for producing gypsum wallboard

An apparatus for production of a gypsum product is provided which comprises a conveyer comprising a conveyer belt and means for rotating the conveyer belt; means for forming a gypsum product; and at least one laser scanner positioned over the conveyer belt at the location where the scanner scans at least one edge of the gypsum product which is at least partially set; and the laser scanner is in communication with a processor. Methods for forming a gypsum product with the apparatus are provided as well.. ... United States Gypsum Company








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