Class 106/783 - Layered or coated material, nominal molding or shaping, or other physical process (e.g., steam, electrical, magnetic or wave energy, manipulative steps, etc.)

Subclass of Class 106 - Compositions: coating or plastic
Definition: Subject matter involving layered or coated material, nominal
No. of patents: 75
Last issue date: 06/03/2008

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Number	Title	Issue Date
7381261	Expanded perlite annealing process This invention is directed to a method of reducing the water demand of expanded perlite that includes obtaining a vibrating screen supported at an angle and placing expanded perlite on the vibrating screen. The expanded perlite is moved over the screen past toward a...	06/03/2008
7374611	Sprayable machinable media In conjunction with water, a mixture can be used to prepare a sprayable slurry that hydrates to form a machinable plaster composition. The mixture includes from about 80% to about 98% by weight calcium sulfate hemihydrate, from about 1% to about 5% by weight adhesiv...	05/20/2008
7371278	Method and apparatus for stabilizing plaster The invention provides a process for stabilizing plaster and an apparatus for implementing the moistening part of the process. The process comprises the following steps: a) providing a heated HH-plaster preferably at temperatures over 100° C.; b) feeding the hot pl...	05/13/2008
7300515	Facing material with controlled porosity for construction boards This invention provides facing materials for cementitious boards such as those including Portland cement or gypsum cores. The preferred facing material includes, in a first embodiment, a facing layer having an areal weight of about 300 grams/M2, and an ai...	11/27/2007
7223443	Antimicrobial cementitious composition An antimicrobial cementitious composition for imparting antimicrobial characteristics to cement comprises cement and an antimicrobial agent selected from the group consisting of an ortho-phenyl phenol or salt thereof, a tolyl diiodomethyl sulfone, a zinc pyrithione,...	05/29/2007
7172403	Apparatus for preparing a gypsum wallboard core A gypsum wallboard core, and methods and apparatus for making the same are disclosed. Methods of making a gypsum wallboard core include extruding a gypsum slurry containing water, gypsum, slip agents, water-reducing agents, surfactants and, optional additives, throu...	02/06/2007
7121713	Swinging agitator for a gypsum calcining apparatus and the like An agitation mechanism for a gypsum processing apparatus which includes a housing having a bottom wall, and at least one side wall. The housing can be constructed and arranged to receive and process gypsum-based products. An agitator frame having a similarly shaped ...	10/17/2006
7033431	Surfactant composition for gypsum plaster boards A gypsum composition including gypsum, water, and a surfactant composition of alkyl sulfates of formula H(CH2)nOSO3−M+, in which n is from 6 to 16, the mean number of carbon atoms in the alkyl sulfate composit...	04/25/2006
6902614	Perlited Portland cement plaster joint compound additive with lime A composition and method for treating a surface is described. In one embodiment, the composition comprises about 10% to 90% by weight of cement, about 10% to 90% by weight of plaster, about 0.01% to about 20% by weight of lime, and about 0% to about 30% by weight of...	06/07/2005
6893752	Mold-resistant gypsum panel and method of making same A mold-resistant gypsum panel includes a core of an interlocking matrix of calcium sulfate dihydrate crystals, a facing material on at least one side of the panel and a salt of pyrithione dispersed through both the core and the facing materials. A method of making a...	05/17/2005
6767647	Antimicrobial wallboard A gypsum wallboard that exhibits antimicrobial characteristics is disclosed. A method for making the wallboard is also disclosed. Suitable antimicrobial agents that may be applied to the wallboard or any components thereof include propiconazole, sodium pyrithione, t...	07/27/2004
6695901	Gypsum casting composition and method of casting I provide a multi-part aqueous gypsum dental casting composition having gypsum and water and wherein (a) one or more of a first compound is mixed in the gypsum and/or water; or (b) one or more of the first compound and one or more of a second compound are...	02/24/2004
6468632	Method of edge-sealing gypsum board for clean room quality A method for coating the sawed edges of gypsum wallboard to prevent dusting of gypsum particles in clean rooms. The method includes applying a water-dispersible polymers to the sawed edges of gypsum wallboard. The polymer forms a water-insoluble salt thro...	10/22/2002
6447597	Hydrated calcium aluminate based expansive admixture An additive, a mixture incorporating the additive and a method of formulating a mortar incorporating the additive. The additive is based on calcium sulfoaluminate composed of C3 AH6 and CAH10 where C=calcium oxide, A=alumi...	09/10/2002
6379458	Efficient set accelerator for plaster A set accelerator for at least one of accelerating the hydration rate and reducing the set time of an aqueous slurry of calcium sulfate hemihydrate is described. The set accelerator consists of a mixture of ground calcium sulfate dihydrate and zinc sulfat...	04/30/2002
6355099	Plaster mixture for forming a machinable composition A plaster mixture for forming a machinable composition, includes calcium sulfate hemihydrate; an internal lubricating dispersable binder, and an adhesive binder for adhering the plaster mixture to a substrate. In the preferred embodiment, the composition ...	03/12/2002
6352585	Gypsum casting composition and method of casting A multipart gypsum casting composition comprising a gypsum composition and a water composition where either the water and/or the gypsum composition contains at least two acids selected from the group consisting of oxalic acid, boric acid, phosphoric acid,...	03/05/2002
6319312	Strengthened, light weight wallboard and method and apparatus for making the same A novel wallboard composition is disclosed comprising a unique combination of synthetic binders selected for their ability to establish a strengthened permanent bond in the final dry state for use in a wallboard composition comprising primarily gypsum, an...	11/20/2001
6295794	Joint compound including recycled constituents and method and system for making the same A composition of matter for joint or texture compound used in wallboard applications which incorporates an ingredient which has been reclaimed from waste wallboard panel. A method and system for reconstituting the waste wallboard into the joint compound i...	10/02/2001
6221151	Gypsum set accelerator and method of making the same A composition for accelerating the setting reaction of an aqueous calcined gypsum slurry, and a method of making the same are disclosed. The composition includes a vibratory ball milled mixture of calcium sulfate dihydrate and a surfactant. The compositio...	04/24/2001
6200380	Method for continuous production for wallboard tape joint compound A method of continuously producing a cementitious composition such as joint compound includes pre-mixing at least two dry ingredients and pre-mixing at least two liquid ingredients. The ingredients are provided in a continuous mixing apparatus and at leas...	03/13/2001
6171387	Reversible agglomeration of fine particle plaster of Paris A method for the reversible agglomeration of fine particles of plaster of Paris (CaSO4.1/2H2 O) and agglomerates made by the method which comprises agitating the fine particles in the presence of an organic polar liquid preferably ne...	01/09/2001
6165261	Water-resistant gypsum composition The present invention relates to water-resistant gypsum compositions, methods of making such composition, as well as manufacturing methods and products comprising such compositions....	12/26/2000
6039800	Production of foamed compositions containing gypsum Disclosed is a process of making foamed compositions of water, gypsum, and either or both of alpha-olefin sulfonates and/or amphoteric surfactants of formula (a) or (b) R4 --(OC3 H6)0-1 --(C(O)NH(CH2)...	03/21/2000
5964940	Process for increasing the water solubility of gypsum A process for increasing the water solubility of gypsum in which gypsum is ground to about 5 to 50 mesh U.S. Standard Sieve Size, about 5 to 95 parts by weight of ground gypsum are mixed with about 2 to 25 parts by weight concentrated sulfuric acid having...	10/12/1999
5879446	Gypsum wallboard, and method of making same A method of preparation of gypsum wallboard, as well as a core composition suitable for use therein, are disclosed. The core composition includes a slurry of calcium sulfate hemihydrate (stucco), water, and calcium aluminum lignosulfonate and/or aluminum ...	03/09/1999
5873936	Cement composition self-leveling floor coating formulations and their method of use A cement composition comprising fine aggregate, preferably sand, in an amount of about 10 to about 25 wt %; blast furnace slag cement, in an amount of about 20 to about 35 wt %; gypsum, in an amount of about 20 to about 35 wt %; Portland cement, in an amo...	02/23/1999
5846317	Method of controlling the hydration behavior of gypsum in the manufacture of composite materials A method of controlling the ratio of hydration time (HT) to open time (OT) in the manufacture of composite materials from a mixture containing hydratable calcium sulphate such as gypsum binders, aggregates, fibers, water additives and other additives is d...	12/08/1998
5779786	Ready mixed setting-type joint compound, and method of making same A process for the production of a ready-mixed setting-type joint compound includes the use of calcium sulfate hemihydrate, water, and a set-retarding agent. The retarder includes a polymer composition including acrylic acid and acrylamide monomer units, f...	07/14/1998
5743954	Method for continuous refractoryless calcining of gypsum A method and apparatus is disclosed for the continuous calcining of gypsum material in a high-efficiency, refractoryless kettle preferably heated by a multiple series of separate immersion tube burner coils, each coil operating within a specific calcining...	04/28/1998
5741357	Hydrated high alumina cement A hydraulic cement composition is disclosed which utilizes as part of an expansive component novel coated particles of high alumina cement. The particles have a core of substantially unhydrated high alumina cement and an outer layer of hydration products ...	04/21/1998
5653797	Ready mixed setting-type joint compound and method of making same A process for the production of a ready-mixed setting-type joint compound includes the use of calcium sulfate hemihydrate, water, and a set-retarding agent. The retarder includes a polymer composition including acrylic acid and acrylamide monomer units, f...	08/05/1997
5575844	Method of preparing gypsum products The invention provides a method of making gypsum products such as plasterboard from foamed gypsum plaster slurry. The method uses a first mixing chamber 10 containing a high speed rotor 14 and inlets 18, 19 for gypsum plaster and water. The initial disper...	11/19/1996
5439518	Flyash-based compositions Binder compositions are provided which are principally composed of a lime-containing flyash, and optionally hydratable gypsum, with a small amount of a property improving additive. The compositions are capable of setting when mixed with sufficient water t...	08/08/1995
5342566	Method of manufacturing fiber gypsum board A method and apparatus for producing gypsum board. The method includes the steps of mixing a predetermined amount of fibers, absorbent, and water to form a mixture of wetted, loose fibers, mixing the wetted fibers with predetermined amount of dry calcined...	08/30/1994
5240500	Gypsum based wallboard taping composition A joint compound for use with an apparatus for taping joints between pieces of wallboard comprises 35-60% by weight of a gypsum base plaster; from about 30-70% by weight of an alcohol-water mixture; 10-25% by weight of polyvinyl acetate; and optionally fr...	08/31/1993
5076978	Method of producing gypsum decorative molding Decorative interior molding is molded from a slurry of gypsum, water, perlite, and a foaming agent. The slurry is surrounded by paper, cured, and dried....	12/31/1991
5041333	Gypsum board comprising a mineral case A continuous process for the production of gypsum board of variable yet predictable density, wherein a fibrous form of stucco produced from gypsum crystals or fibers is combined with standard calcined gypsum and formed into the board. The density of the r...	08/20/1991
5026428	Manufacturing plaster articles In the production of plaster articles, for example, dental dies and moulds, powdered gypsum (calcium sulphate) is mixed with an aqueous solution of boric acid and/or silicic acid. By incorporating boric acid and/or silicic acid in the mix, the hardness an...	06/25/1991
5000793	Method of manufacturing a building element based on a hydraulic binder, an element thus obtained, and a building method using such elements A building element based on plaster which is manufactured by dry mixing sand and plaster, by dampening the mixture, by placing the damp mixture in a mold, and by compressing the mixture in the mold while the plaster hydrates in order to densify the crysta...	03/19/1991

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Class 106/783 - Layered or coated material, nominal molding or shaping, or other physical process (e.g., steam, electrical, magnetic or wave energy, manipulative steps, etc.)