| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 156039000 | Plaster board making | 34 |
| 20080245461 | COVER STOCK CUTTER AND SPLICING APPARATUS FOR WALLBOARD MANUFACTURE AND METHODS OF USING THE SAME - A cover stock supply system for continuously feeding cover stock to a wallboard production line includes: a plurality of cover stock cradles for receiving rolls of cover stock; a splicing table; a cover stock cutter disposed between the cover stock cradles and the splicing table. The cover stock cutter has a positioning loop around a cover stock feed path and a cutting cable attached to the positioning loop. Cutter is configured and adapted to rotatably deploy the cutting cable from the drawn position on a first side of the cover stock feed path to a re-set position on a second side of the cover stock feed path upon motion thereof around the cover stock feed path. | 10-09-2008 |
| 20100116405 | UTILITY MATERIALS INCORPORATING A MICROPARTICLE MATRIX FORMED WITH A SETTING AGENT - A composition, utility material, and method of making a utility material is disclosed. A composition having an improved setting time may include a plurality of microparticles mixed with a sodium silicate binder and an isocyanate setting agent, where the microparticle composition has a setting time of less than or equal to one hour. A utility material may be a wallboard that includes the composition. | 05-13-2010 |
| 20100116406 | Wax Emulsion for Use in Building Products - Provided herein are an aqueous wax emulsion, comprising water; a paraffinic hydrocarbon; polyvinyl alcohol and a wax component comprising synthetic olefin wax component. The synthetic olefin wax component may be selected from the group consisting of (i) a synthetic normal α-olefin wax; (ii) a synthetic olefin wax of a carbon chain length of about 20 or more carbon atoms, that is modified by oxidizing and/or by refining through distillation or stripping; and (iii) combinations thereof. Such emulsions are also useful for and disclosed herein are settable gypsum compositions and water-resistant wallboard formed therefrom. Also included herein is a montan wax substitute for use in an aqueous montan-based wax emulsion having paraffinic hydrocarbon, a wax component, water and polyvinyl alcohol wherein the wax component includes the montan wax substitute in place of use of a montan wax in the wax component such that the montan wax substitute is about 1 part to about 100 percent of the wax component and includes a synthetic olefin wax. | 05-13-2010 |
| 20100132869 | APPARATUS AND METHOD FOR MANUFACTURING GYPSUM BOARD - A gypsum board forming device ( | 06-03-2010 |
| 20100186870 | MIXTURES AND EMULSIONS TO REDUCE ENERGY IN GYPSUM WALLBOARD MANUFACTURE - Provided herein are mixtures, emulsions and other additives for use in manufacturing gypsum wallboard. The mixtures and emulsions may be wax-based emulsions or wax-free mixtures or emulsions, with wax-based emulsions including water; at least one wax, a dispersant which may include sulfur or a sulfur-containing group, and a particular wetting agent or surfactant. Mixtures may also be prepared including water, a dispersant, and a particular wetting agent or surfactant. Gypsum slurries may be prepared using such emulsions and mixtures. | 07-29-2010 |
| 20100288415 | Gypsum Based Compositions - A gypsum stucco composition comprising the following components finely divided; calcium sulphate hemihydrate in calcined solid beta crystalline form; and in intimate mixture with said finely divided calcium sulphate hemihydrate and mixed therewith no later than calcination to form the hemihydrate, a sulphate salt comprising at least one of ammonium sulphate and aluminium sulphate, in an amount such that when the stucco composition is mixed with water and allowed to set, the resulting set plaster has increased compressive strength, flexural strength and/or E-modulus compared to a set plaster produced from said finely divided calcium sulphate hemihydrate containing no said sulphate salt. | 11-18-2010 |
| 20110192518 | METHOD FOR DETERMINING STRUCTURAL PARAMETERS OF COMPOSITE BUILDING PANELS - A method of determining face paper properties of all types of wallboard including providing a core strength value of the wallboard, determining a required nail pull value based the wallboard specifications and calculating a face paper stiffness value based on the provided core strength value and the determined nail pull value. The method includes displaying the calculated face paper stiffness value on a display device. | 08-11-2011 |
| 20160052167 | GYPSUM BOARD MANUFACTURING METHOD AND MANUFACTURING DEVICE - As a lower forming plate | 02-25-2016 |
| 20160052248 | System and Method for Constructing Composite Building Boards Using Thermoplastic Films - Disclosed are building board manufacturing techniques that minimize the build-up of slurry on associated forming equipment and also produce panels with enhanced physical properties. The methods involve applying a dissolvable film laminate to one or more fiber mats at the outset of the forming process. In the undissolved state, the film acts as a containment envelope for the gypsum slurry and any free floating glass fibers. During subsequent curing, the film is dissolved by vaporized water. In its dissolved state, the film is liquefied and coats the fibers of the underlying mat. This results in a building board with improved physical properties. | 02-25-2016 |
| 20160060168 | GYPSUM WALLBOARD AND METHOD OF MAKING SAME - Compositions for gypsum board are disclosed, comprising a mixture of a gypsum slurry and a pre-generated foam and a coalescing agent. The coalescing agent comprises one or more coalescing agents that are added to the composition singly, separately or in combination to change the size and distribution of the air bubbles in the foamed gypsum slurry. The resulting gypsum cores have increased nail pull resistance and an improved facer/gypsum core bond. | 03-03-2016 |
| 20170233294 | NEUTRAL AQUEOUS WAX EMULSIONS | 08-17-2017 |
| 156040000 | With bending or folding of facing sheet | 2 |
| 20100307657 | SYSTEM AND METHOD OF MAKING PLASTER PANELS - A system and method of making a plaster panel to use in the construction of a wall of a building in a relatively faster, easier, more efficient, and more precise manner for either interior or exterior walls is disclosed. The created plaster panels may include a slab of cementitious composition including a mixture of sizes of cut expanded polystyrene, a quantity of monofilament fiber, and a binding agent. At least one layer of a mesh may surround the slab, wherein the resulting panel is light in weight, flexible and strong. Such panels may be fixed in place to a building frame by suitable fasteners such as nails or screws, while causing little or no fracturing of the panel. | 12-09-2010 |
| 20110192519 | Method and System for Placing a Corner Reinforcement Insert in a Gypsum Board Corner Assembly - A gypsum board corner assembly is formed with an integrated reinforcement strip. The strip may be a folded sheet-metal strip or a thin rod. First, a gypsum board is formed with a groove that extends substantially through the entire gypsum core, but leaves the laminate paper of one side. Then a reinforcement insert is placed in the groove. Here, the insert is formed of or includes ferromagnetic material. The insert is subjected to a magnetic field to pull the insert into the groove, by action of the magnet. After an amount of adhesive is applied in the groove, the gypsum board is folded along the groove while the insert is being pulled into the groove by the magnet. The resulting gypsum board corner assembly has a very accurately placed insert that defines a straight corner edge thereof. | 08-11-2011 |
| 156041000 | With water-proofing with added material | 2 |
| 20140138007 | FIBERGLASS MESH SCRIM REINFORCED CEMENTITIOUS BOARD SYSTEM - A cementitious board system which is reinforced on its opposed surfaces by an improved glass fiber mesh scrim with thicker yarn and larger mesh openings to provide a cementitious board with improved handling properties while retaining tensile strength and long term durability. The fabric is constructed as a mesh of high modulus strands of bundled glass fibers encapsulated by alkali and water resistant material, e.g. a thermoplastic material. The composite fabric also has suitable physical characteristics for embedment within the cement matrix of the panels or boards closely adjacent the opposed faces thereof. The fabric provides a board system with long-lasting, high strength tensile reinforcement and improved handling properties regardless of their spatial orientation during handling. Included as part of the invention are methods for making the reinforced board. | 05-22-2014 |
| 20150068657 | FUNCTIONAL PULP-CONTAINING COMPOSITES FOR DRYWALL APPLICATIONS - The present invention provides composite materials comprising a population of cellulose fibers complexed with an activator, and an additive comprising synthetic fibers complexed with a tethering agent, wherein the tethering agent has an affinity for the activator, and wherein an interaction between the tethering agent and the activator attaches the synthetic fibers to the cellulose fibers to form the composite material. The present invention also provides methods of manufacture for such composite materials, and methods for their use, for example in forming gypsum board composites. | 03-12-2015 |
| 156042000 | With embedding of reinforcing material during or subsequent to core formation | 5 |
| 20090025850 | CONSTRUCTION BOARD FOR CARBON CAPTURE AND RECYCLE - A manufactured construction board is formed from a composition that may include magnesium oxide, magnesium chloride, a binding agent (e.g., perlite), wood shavings, recycled board scraps, and water. The construction board further includes fiberglass and polyester paper sheets on opposite sides of the construction board. A method of fabricating the construction board is also disclosed to include mixing magnesium chloride with water to form a solution, mixing the solution with magnesium oxide, perlite and a binding agent to form a paste, and pouring the paste onto a mold to form a construction board. The paste is poured onto a mold which is then passed through a series of rollers to spread out the paste evenly across the mold and to form the paste into the desired thickness. The resulting construction board is fire and water resistant and much more durable than conventional sheetrock. | 01-29-2009 |
| 20090159173 | LOW FIBER CALCINATION PROCESS FOR MAKING GYPSUM FIBERBOARD - An energy efficient method for making a gypsum cellulose fiberboard comprising adding a first portion of cellulose fiber to gypsum before the gypsum and cellulose fiber are co-calcined in a reactor, adding a second portion of cellulose fiber to the slurry after it leaves the reactor to form a second slurry, depositing the slurry to form a mat dewatering the mat, rehydrating the mat and then finishing the mat to form a final gypsum cellulose fiberboard. A reduction of up to about 40% to 50% of steam energy used can be achieved when the second portion of added cellulose fiber is 50% or more of the total cellulose fiber used in the final board compared to gypsum cellulose board made with the same ingredients but when all of the fiber is added to the gypsum prior to the reactor. | 06-25-2009 |
| 20100132870 | PANEL SMOOTHING PROCESS AND APPARATUS FOR FORMING A SMOOTH CONTINUOUS SURFACE ON FIBER-REINFORCED STRUCTURAL CEMENT PANELS - A vibrating flexible smoothing sheet or shroud disposed transversely of a direction of travel of a formed fiber panel including gypsum-cementitious slurry and embedded chopped fibers. The sheet is used to smooth the surface of the panel as it exits a fiber embedment station of a structural cementitious panel production line to remove grooves and other non-uniform surface imperfections to reduce the need for costly finishing after the panels are cured and cut to size. The flexible sheet is designed to float over the surface of the formed panel without tearing or otherwise damaging the surface of the heavily fiber reinforced surface layers of the panel. The vibrating sheet is pivotally mounted on the side dams of the web production line so it can float over the panel surface during use, but be raised off the line when not in use. | 06-03-2010 |
| 20130248078 | SLURRIES AND METHODS OF MAKING LIGHT WEIGHT GYPSUM BOARD - The invention generally provides gypsum-containing slurries including stucco, naphthalenesulfonate dispersant, and pregelatinized starch. The naphthalenesulfonate dispersant is present in an amount of about 0.1%-3.0% by weight based on the weight of dry stucco. The pregelatinized starch is present in an amount of at least about 0.5% by weight up to about 10% by weight of pregelatinized starch by weight based on the weight of dry stucco in the formulation. Other slurry additives can include trimetaphosphate salts, accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, gypsum wallboard, and a method of making gypsum wallboard. | 09-26-2013 |
| 20130327461 | System And Method For The Construction Of Bound Fibrous Mats - Disclosed is a system and method for constructing fibrous mats. In accordance with the disclosure, continuous lengths of filament are pre-coated with a liquefied thermoplastic. The pre-coated filaments are then laid down upon a belt to forum a fibrous mat. The filaments can be laid down in continuous lengths or they can be chopped into discontinuous lengths. The filaments are heated after they have been laid down in order to re-liquefy the thermoplastic and facilitate bonding between intersecting fibers. The disclosure further relates to a system and method for incorporating constructed fibrous mats into a composite building board. | 12-12-2013 |
| 156043000 | Pore forming in situ | 2 |
| 20130068364 | METHOD OF MAKING 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. | 03-21-2013 |
| 20140158273 | 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. | 06-12-2014 |
| 156044000 | With preliminary treatment of facing sheet | 4 |
| 20100319832 | Polyolefin Coated Fabric Reinforcement and Cementitious Boards Reinforced with Same - The present invention provides a method making glass fiber fabric reinforcements, cement boards, and glass fiber coatings for such reinforcements. The glass fiber fabric reinforcement includes a glass fabric containing multiple yarns containing glass filaments and a polymeric coating disposed onto the multiple yarns to form a coated glass fabric. The polymeric coating comprises a polyolefin based copolymer composition whereby the glass fabric has a Gurley Stiffness measurement of about 100-3000 mg and an ASTM D 638 (2% Secant) modulus of compression of about 1-100 MPa. The reinforcement is sufficiently drapable and lacking in shape memory so as to be curved around the edge of a cement board during the manufacture of same. | 12-23-2010 |
| 20110247742 | Method of making building boards having predetermined size and precise dimensions - A method is provided for cutting a slab of gypsum board in two sections using a single cord in either the longitudinal direction or lateral direction. The cord is fixed at one edge and is placed between the gypsum and a liner sheet coextensively adhered to the board surface. By pulling the cord away, the board is cut into two sections of predetermined sizes and precise dimensions. | 10-13-2011 |
| 20110297291 | System and Method for Constructing Composite Building Boards Using Thermoplastic Films - Disclosed are building board manufacturing techniques that minimize the build-up of slurry on associated forming equipment and also produce panels with enhanced physical properties. The methods involve applying a dissolvable film laminate to one or more fiber mats at the outset of the forming process. In the un-dissolved state, the film acts as a containment envelope for the gypsum slurry and any free floating glass fibers. During subsequent curing, the film is dissolved by vaporized water. In its dissolved state, the film is liquefied and coats the fibers of the underlying mat. This results in a building board with improved physical properties. | 12-08-2011 |
| 20140352866 | NEUTRAL AQUEOUS WAX EMULSIONS - Wax emulsions for the manufacture of wallboard include water; a lignosulfonic acid or a salt thereof; and at least one wax selected from the group consisting of slack wax, paraffin wax and montan wax. The emulsions may have a pH of between about 6.5 and 7.9. Such emulsions can provide enhanced moisture resistance to the wallboard. | 12-04-2014 |
| 156045000 | With subsequent treatment of plaster board | 8 |
| 20090173423 | Gypsum board faced with non-woven glass fiber mat - A gypsum board comprises a set gypsum layer having a first face and a second face. A fibrous mat is affixed to at least one of the faces. The mat comprises a non-woven web bonded together with a resinous binder. The web is composed of chopped continuous glass fibers having an average fiber diameter ranging from about 9.5 to 12.5 μm. The board is exceedingly durable. It has a smooth surface that is readily finished in an aesthetically pleasing way, using paint or other wall covering systems. | 07-09-2009 |
| 20090301630 | PRODUCTION METHOD FOR HYDRAULIC BINDER-BASED, TAPERED-EDGE BOARDS - The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5. | 12-10-2009 |
| 20100252166 | System and Method for Making Wallboard - A process and apparatus for forming wallboard panels having recessed edges along all four edges which process involves passing an unfinished length of wall board through a lateral recess forming apparatus. | 10-07-2010 |
| 20110192520 | LIGHTWEIGHT PLASTERBOARD AND PLASTER SLURRY COMPOSITION USED FOR ITS MANUFACTURE - A plaster slurry composition includes plaster, water and starch, the starch having a Brookfield viscosity of less than 60 cps at a temperature below 60° C. and a Brookfield viscosity greater than 10,000 cps at a temperature of 70° C. | 08-11-2011 |
| 20120305162 | GYPSUM PLASTER BOARD AND A METHOD FOR PRODUCING A GYPSUM PLASTER BOARD - Gypsum plaster board, containing a gypsum matrix and 0.1 to 10% by weight carbon particles, wherein the particle size (d50) of the carbon particles ranges from 0.5 to 4 mm. | 12-06-2012 |
| 20130299059 | Method for Constructing Composite Building Boards Using Dissolvable Films - Disclosed are building board manufacturing techniques that minimize the build-up of slurry on associated forming equipment and also produce panels with enhanced physical properties. The methods involve applying a dissolvable film laminate to one or more fiber mats at the outset of the forming process. In the un-dissolved state, the film acts as a containment envelope for the gypsum slurry and any free floating glass fibers. During subsequent curing, the film is dissolved by vaporized water. In its dissolved state, the film is liquefied and coats the fibers of the underlying mat. This results in a building board with improved physical properties. | 11-14-2013 |
| 20140261954 | METHOD OF PREPARING MAT-FACED ARTICLE - Disclosed is a method of preparing a mat-faced cementitious article composite. A mat-faced article (e.g., board) is formed and the composite is formed upon application of a finish composition (e.g., hydrophobic). In one aspect, the mat-faced gypsum article comprises a mat having an inner surface adjacent to a cementitious core first surface and an opposite outer mat surface. An aqueous cementitious finish composition is applied to the outside mat surface to form the mat-faced cementitious article composite. Desirably, the finish composite can suitably be applied by a roller assembly comprising a finish roller. In some embodiments, the finish roller has an uneven surface, including for example, grooves or depressions (e.g., circumferential or longitudinal) defined therein. | 09-18-2014 |
| 20160375656 | COMPOSITE GYPSUM BOARD AND METHODS RELATED THERETO - Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the board core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board. | 12-29-2016 |
