Water-settable Material (e.g., Gypsum, Etc.) Patents (Class 428/703)
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Patent number: 6641629Abstract: A coating composition for forming abrasion-resistant, high clarity coatings is described. It has been found that a macrocrystalline or single crystal mineral abrasive can be added at high levels, about 5 to about 80 percent by weight, to art-recognized film-forming resin compositions for producing coatings exhibiting exceptional abrasion resistance and clarity. Such a coating composition is useful for application to surfaces including wood, vinyl, tile, rubber modified cement, marble, metal, plastic, and laminated surfaces.Type: GrantFiled: August 20, 2002Date of Patent: November 4, 2003Inventors: Eugen Safta, Frank Bor-Her Chen, Harvey Richard Forrest, Gregory David Muselman
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Patent number: 6632550Abstract: The invention provides a set gypsum-containing product having increased resistance to permanent deformation and a method for preparing it comprising forming a mixture of a calcium sulfate material, water, and an appropriate amount of one or more enhancing materials chosen from condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units. The mixture is then maintained under conditions sufficient for the calcium sulfate material to form a set gypsum material.Type: GrantFiled: February 16, 1999Date of Patent: October 14, 2003Assignee: United States Gypsum CompanyInventors: Qiang Yu, Steven W. Sucech, Brent E. Groza, Raymond J. Mlinac, Frederick T. Jones, Frederick M. Boehnert
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Patent number: 6613424Abstract: The present invention provides for an acoustically absorbent porous panel that is both rigid and resistant to sagging caused by moisture. The acoustically absorbent porous panel is comprised of at least two layers. The first layer is a facing layer formed from a cured aqueous foamed cementitious material. The foamed cementitious material comprises on a wet basis about 53% to about 68% by weight cement, about 17% to about 48% by weight water, about 0.05% to about 5% by weight fiber, and about 0.01% to about 10% by weight surfactant. Additionally, pores distributed within the cured material comprising about 75% to about 95% by volume of the material. The second layer is a backing layer that is affixed to the facing layer.Type: GrantFiled: September 15, 2000Date of Patent: September 2, 2003Assignee: AWI Licensing CompanyInventors: Dean L. Putt, Peter A. Christie, Andrea M. Moser, Marsha Stalker Bischel, Anthony L. Wiker
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Patent number: 6610429Abstract: The present invention is directed to a 3DP™ material system ad method, and an article made therefrom. The method of the present invention includes building cross-sectional portions of a three-dimensional article, and assembling the individual cross-sectional areas in a layer-wise fashion to form a final article. The individual cross-sectional areas are built by using an ink-jet printhead to deliver an aqueous fluid to a particulate material that includes plaster.Type: GrantFiled: April 10, 2001Date of Patent: August 26, 2003Assignee: Z CorporationInventors: James F. Bredt, Timothy C. Anderson, David B. Russell
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Patent number: 6599647Abstract: Alumina cement mortar is used as a source material for a kneaded cement cured body for joining hardware onto an insulator body, whereby the insulator can maintain high initial and long term mechanical strength and high electrical strength over a long period of time, and the curing time for forming the cured body is shortened to reduce the cost of producing the insulator. The alumina cement mortar is formed by kneading a mixture of alumina cement particles having a specific surface area of at least 3500 cm2/g, a polymer-steric-hindrance type water reducing agent, an aggregate, and water, or an alumina cement mortar is obtained by kneading a mixture of alumina cement particles having an amorphous phase on an outer peripheral surface of particles and having a specific surface area of at least 3500 cm2/g, a water reducing agent, an aggregate, and water.Type: GrantFiled: December 26, 2001Date of Patent: July 29, 2003Assignee: NGK Insulators, Ltd.Inventors: Noriyasu Oguri, Osamu Imai, Hironori Suzuki
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Publication number: 20030127024Abstract: The invention relates to a silicatic coating mass, a method for producing the same, the use thereof and a substrate that is coated with the silicatic coating mass. The silicatic coating mass comprises water glass or a mixture of water glass and silica sol. The molar ratio of SiO2 and alkali oxide is 5 to 30 mol SiO2 per mol alkali oxide. Said coating mass also comprises one or more organic ammonium compound/s, one or more filler/s and optionally other additives. The inventive silicatic coating mass is provided with increased shelf live when consisting of one component and the coated substrate is characterised by an increased stability against atmospheric influences.Type: ApplicationFiled: November 13, 2002Publication date: July 10, 2003Inventors: Franz Heiberger, Hermann Schlaffer
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Patent number: 6582836Abstract: A calcium salt protective coating formed in situ by combining fatty acids with lime, also the associated method of forming the protective coating in situ. The fatty acids are preferably vegetable fatty acids such as from soapstock byproduct skimmings produced during the manufacture of vegetable oil. Experimental testing has shown that the protective coating is substantially impervious to moisture. The protective coating is a suitable covering for hay bales, silage, coal piles, and road salt piles. Further experimental testing has shown that the present invention is also suited to environmental soil bioremediation (“landfarming”) using microbes, in which the fatty acid ingredient, in addition to being used in formation of a protective coating that inhibits introduction of oxygen into the soil being treated, is also used as a carbon source for the microbial activity.Type: GrantFiled: October 19, 2001Date of Patent: June 24, 2003Assignee: Valley Products Company, Inc.Inventors: Thomas E. Wood, Michael L. Austin
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Publication number: 20030101898Abstract: An organosilane- and/or organosiloxane-containing composition reduces active corrosion of steel reinforcement in concrete.Type: ApplicationFiled: November 5, 2002Publication date: June 5, 2003Applicant: DEGUSSA AGInventors: Burkhard Standke, Edward McGettigan
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Patent number: 6544445Abstract: A fire-resistant composite substrate for use in making structural openings fire-resistant, the substrate containing: (a) elastically compressible particles; (b) at least one heat-activated expanding agent; (c) at least one heat-activated binder; and (d) a diisocyanate adhesive.Type: GrantFiled: August 6, 1999Date of Patent: April 8, 2003Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Robert Graf, Maria-Elisabeth Kaiser
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Publication number: 20030049406Abstract: A composite fire stopping article capable of fire stopping through-penetrations without the need for a secondary reinforcement structure includes an interior insulating material, such as mineral wool, sandwiched between layers of an intumescent material. The insulating material and intumescent material may be enclosed in a bag formed of a polymeric material. The intumescent material is substantially free of graphite and consists essentially of filler material, binder material, and a hydrated alkali metal silicate intumescent component.Type: ApplicationFiled: August 9, 2001Publication date: March 13, 2003Applicant: 3M Innovative Properties CompanyInventor: Michael G. Dykhoff
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Publication number: 20030049481Abstract: A recording sheet for an ink jet printer can improve both recording properties such as vividness of images, printing density, etc., and shelf life such as light resistance of images, ozone resistance, etc. The recording sheet for an ink jet printer comprises a base material and an ink receiving layer provided on at least one surface of the base material, in which the recording sheet contains oligosaccharide and divalent metallic salt.Type: ApplicationFiled: August 29, 2002Publication date: March 13, 2003Applicant: TOMOEGAWA PAPER CO., LTD.Inventors: Fumikazu Tatsuhashi, Nobuhiro Kubota, Shigeki Asai, Senichi Yoshizawa, Kazushige Katagiri, Minoru Tsuchida
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Publication number: 20030035981Abstract: A novel gypsum board having antifungal properties is disclosed. The board comprises a gypsum core, front and back paper facings and an antifungal agent effective at inhibiting fungal growth. A preferred antifungal agent is cetyl pyridinium chloride. The antifungal agent can be present in the gypsum core and/or on one or both of the paper facings. In addition, the antifungal agent may be encapsulated in a material that releases the antifungal agent over time and/or upon exposure to moisture. Also disclosed are methods for preparing the aforementioned antifungal gypsum board.Type: ApplicationFiled: August 1, 2002Publication date: February 20, 2003Inventor: Charles Capps
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Publication number: 20030031898Abstract: A novel gypsum board having antifungal properties is disclosed. The board comprises a gypsum core, front and back paper facings and an antifungal agent effective at inhibiting fungal growth. A preferred antifungal agent is cetylpyridinium chloride. The antifungal agent can be present in the gypsum core and/or on one or both of the paper facings. In addition, the antifungal agent may be encapsulated in a material that releases the antifungal agent over time and/or upon exposure to moisture. Also disclosed are methods for preparing the aforementioned antifungal gypsum board.Type: ApplicationFiled: September 17, 2002Publication date: February 13, 2003Inventor: Charles L. Capps
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Publication number: 20020192510Abstract: A composite product comprising a substrate layer and one or more functional layers applied thereto. The slurry is applied to the substrate layer to form a functional layer and the functional layer dewatered through the substrate layer. The functional layers can be repeated to build up a laminated composite product. Functional additives may be included in each layer to provide desired properties to that layer and indeed to the subsequent composite product.Type: ApplicationFiled: March 4, 2002Publication date: December 19, 2002Inventors: Basil Naji, John Sydney Cottier, Robert Lyons
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Patent number: 6490828Abstract: A panel covering for use in an office environment is disclosed. The panel covering includes an exterior layer including a decorative surface treatment. The panel covering also includes an interior base layer including a polymer material coupled to the exterior layer. The panel covering also includes a reinforcing layer including a porous web installed between the exterior layer and the interior layer. The polymer material may include polyethylene terephthalate or PET. A method of forming a panel covering is also disclosed.Type: GrantFiled: July 20, 2000Date of Patent: December 10, 2002Assignee: Steelcase Development CorporationInventors: Christopher S. Fuller, Arnold A. Krumrie, Mark C. Volesky
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Patent number: 6489040Abstract: A gypsum wall board is disclosed in which at least one of the paper cover sheets is made with neutral size and a small amount of a cationic polyamide resin is added to the stock used to make the cover sheet. The paper cover sheets provide improved resistance to post-manufacturing problems that involve delamination, such as “Roll-up”.Type: GrantFiled: February 15, 2000Date of Patent: December 3, 2002Assignee: United States Gypsium CompanyInventors: Evan V. Rohlf, Charles W. Cochran
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Publication number: 20020177003Abstract: Noncorroding reinforcing steel, and steel reinforced concrete, which has an adherent bond with hydrated concrete formed by a thermally sprayed hydraulically reactive layer of a material such as blast furnace slag on the steel surface.Type: ApplicationFiled: April 19, 2002Publication date: November 28, 2002Inventor: James J. Myrick
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Patent number: 6479171Abstract: An organic electroluminescent device of the type comprises an organic layer 5, 5a or 5b, having a luminescent region, which contains a julolidyl-substituted styryl compound represented by the following general formula [I] General Formula [I]: wherein X1 and X2 independently represent a hydrogen atom, a hydroxyl group or an alkoxy group such as a methoxy group, R1 to R8 independently represent a lower alkyl group such as a methyl group, and R9 to R12 independently represent an electron attracting group such as a cyano group.Type: GrantFiled: July 25, 2000Date of Patent: November 12, 2002Assignee: Sony CorporationInventors: Tadashi Ishibashi, Mari Ichimura, Shinichiro Tamura
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Publication number: 20020155326Abstract: Use of alumina cement mortar is enabled as a source material of a cement kneaded product cured body for joining hardwares onto an insulator body, whereby an insulator can maintain a high mechanical strength (initial strength, long-term strength) and a high electrical strength for a long period of time, and the curing time in forming the cured body is shortened to reduce the cost of producing the insulator. As a source material of a cement kneaded product cured body 14 for joining hardwares (12, 13), one makes use of an alumina cement mortar obtained by kneading an alumina cement having a specific surface area of at least 3500 cm2/g, a polymer-steric-hindrance type water reducing agent, an aggregate, and water, or an alumina cement mortar obtained by kneading an alumina cement having an amorphous phase on an outer peripheral surface of particles and having a specific surface area of at least 3500 cm2/g, a water reducing agent, an aggregate, and water.Type: ApplicationFiled: December 26, 2001Publication date: October 24, 2002Applicant: NGK Insulators, Ltd.Inventors: Noriyasu Oguri, Osamu Imai, Hironori Suzuki
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Publication number: 20020155282Abstract: A moisture-tolerant structural panel comprising a gypsum board comprising a set gypsum core sandwiched between and faced with mats of glass fibers, wherein a free surface of one of said mats is coated with a combination of a mineral pigment, an inorganic adhesive binder and a polymer latex adhesive binder applied to said surface as an aqueous coating composition, said aqueous coating composition upon drying and setting, covering said mat to the extent that substantially none of the fibers of said mat protrude from said coating.Type: ApplicationFiled: April 19, 2001Publication date: October 24, 2002Inventors: Brian G. Randall, Gary A. Ricards
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Patent number: 6468632Abstract: 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 through an ion exchange with the calcium found in gypsum wallboard. The result is a tough, tack free, fast-drying coating that substantially reduces the levels of airborne gypsum particles that come from the sawed edges of gypsum wallboards.Type: GrantFiled: December 6, 2000Date of Patent: October 22, 2002Assignee: National Gypsum Properties, LLCInventor: Daniel A. Winkowski
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Patent number: 6443258Abstract: An acoustically absorbent porous panel formed from a cured aqueous foamed cementitious material comprising on a wet basis of about 53% to about 68% by weight cement, about 17% to about 48% by weight water, about 0.05% to about 5% by weight fiber, and about 0.01% to about 10% by weight surfactant. The panel also has pores distributed within the cured material comprising about 75% to about 95% by volume of the material. The cement-based, foamed panel provides good acoustical performance with enhanced durability and moisture resistance.Type: GrantFiled: September 15, 2000Date of Patent: September 3, 2002Assignee: AWI Licensing CompanyInventors: Dean L. Putt, Marsha Stalker Bischel, Anthony L. Wiker, Andrea M. Moser
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Patent number: 6436159Abstract: A coating composition for forming abrasion-resistant, high clarity coatings is described. It has been found that a macrocrystalline or single crystal mineral abrasive can be added at high levels, about 5 to about 80 percent by weight, to art-recognized film-forming resin compositions for producing coatings exhibiting exceptional abrasion resistance and clarity. Such a coating composition is useful for application to surfaces including wood, vinyl, tile, rubber modified cement, marble, metal, plastic, and laminated surfaces.Type: GrantFiled: December 8, 2000Date of Patent: August 20, 2002Assignee: Lilly Industries, Inc.Inventors: Eugen Safta, Frank Bor-Her Chen, Harvey Richard Forrest, Gregory David Muselman
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Patent number: 6410122Abstract: A fire-resistant sheet-like molded article having flame resistance and capable of producing good fire-resisting properties as the result of residues after combustion having sufficient shape-retaining property and, further, having good workability, a fire-resistant laminate for covering structural steels and a fire-resistant structural material for walls in which said molded article is used as well as a method of fabricating a fire-resistant structural steel and a fire-resistant wall. A fire resistant sheet-like molded article comprising a resin composition and having the-relationship between the initial thickness t (mm) and temperature difference &Dgr;T (° C.) between one side and the reverse side after heating of said one side at 500° C. for 1 hour as represented by: &Dgr;T≧0.015t4−0.298t3+1.566t2+30.151t, and having the initial bulk density at 25° C. of 0.8 to 2.0 g/cm3 and the bulk density after 1 hour of heating at 500° C. of 0.05 to 0.5 g/cm3.Type: GrantFiled: September 2, 1999Date of Patent: June 25, 2002Assignee: Sekisui Chemical Co., Ltd.Inventors: Masaki Tono, Bunji Yamaguchi, Kazuyuki Yahara, Hitomi Muraoka, Norio Numata
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Patent number: 6391958Abstract: 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 in combination with an expanded mineral such as Perlite which largely reduces the amount of gypsum over current gypsum wallboard formulations, thus reducing the weight while maintaining the strength of the wallboard structure. In a preferred embodiment, the lightweight, strengthened wallboard of the present invention also comprises a covering veneer that is applied to the top ply of the face paper to provide increased strength, moisture resistance, and fire retardency, and the back paper top ply is treated to provide increased flexural strength.Type: GrantFiled: October 26, 2000Date of Patent: May 21, 2002Assignee: Advanced Construction Materials Corp.Inventor: Joseph S. Luongo
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Patent number: 6376580Abstract: A polymer comprising an anionic group (e.g. an acid anhydride group, a carboxyl group) and a hydrophilic segment (e.g. a polyoxyalkylene ether unit) is used as a cement retarder. The polymer is obtainable by copolymerization of a monomer including maleic anhydride with a monomer including a vinylalkyl ether-series monomer in which an alkylene oxide is added to allyl alcohol. The polymer may be a copolymer copolymerized with other monomers such as styrene. Use of this cement retarder can provide patterns or washing-finished face on the surface of a concrete product. The cement retarder is suitable for application for a cement retardative sheet.Type: GrantFiled: April 12, 1999Date of Patent: April 23, 2002Assignee: Daicel-Huels Ltd.Inventors: Toru Ikuta, Hiroaki Arita
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Publication number: 20020045074Abstract: The invention provides a set gypsum-containing product having increased resistance to permanent deformation and a method for preparing it comprising forming a mixture of a calcium sulfate material, water, and an appropriate amount of one or more enhancing materials chosen from condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units. The mixture is then maintained under conditions sufficient for the calcium sulfate material to form a set gypsum material.Type: ApplicationFiled: September 21, 2001Publication date: April 18, 2002Applicant: United States Gypsum CompanyInventors: Qiang Yu, Steven W. Sucech, Brent E. Groza, Raymond J. Mlinac, Frederick T. Jones, Paul J. Henkels
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Publication number: 20020009622Abstract: A sprayed-on phosphate cement coating formed from the combination and reaction of a phosphoric acid solution and a base metal solution. The acid solution and base solution may be intermixed prior to spraying, during spraying, or on a substrate. The curing reaction rate of the phosphate cement coating and its final physical properties may be controlled by adding various retardants, accelerants, reducers, wetting agents, superplasticizers, buffers, water reducers, adhesive agents, hardening agents, and/or sequestrants to the precursor solutions. The curing rate and properties of the cement coating may be further controlled by adjusting the temperature of the precursor solutions and/or the target substrate.Type: ApplicationFiled: July 17, 2001Publication date: January 24, 2002Inventor: David M. Goodson
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Patent number: 6319312Abstract: 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, and in a wallboard composition comprising an expanded mineral such as Perlite which largely reduces the amount of gypsum over current gypsum wallboard formulations, thus reducing the weight while maintaining the strength of the wallboard structure. In a preferred embodiment, the lightweight, strengthened wallboard of the present invention also comprises an optional covering veneer that is applied to the top ply of the face paper to provide increased strength, moisture resistance, and fire retardency, and the back paper top ply is treated to provide increased flexural strength.Type: GrantFiled: December 23, 1999Date of Patent: November 20, 2001Assignee: Advanced Construction Materials Corp.Inventor: Joseph S. Luongo
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Patent number: 6299970Abstract: Fiberboards are provided containing at least about 65 wt. % calcium sulfate dihydrate derived from hemihydrate or anhydrous gypsum, and at least about 7 wt. % pulped paper fibers. The boards are capable of being formed into structural members having superior mechanical properties and/or fire resistance, including screw-holding capacities in excess of 650 lbs.Type: GrantFiled: May 19, 1999Date of Patent: October 9, 2001Assignee: Georgia-Pacific Gypsum CorporationInventors: Turner W. Richards, Hubert C. Francis, George F. Fowler
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Patent number: 6270915Abstract: A gypsum board/intumescent material ceiling board includes a gypsum board and a fire-resistive barrier. A first major surface of the gypsum board is an upper side for abutting framing and a second major surface of the gypsum board is an underside for facing a room interior. The fire-resistive barrier is a layer of intumescent coating material applied to and coextensive with one of the major surfaces of the gypsum board. The intumescent coating material contains expandable graphite and a corrosion inhibitor in sufficient quantities to provide a corrosion inhibiting layer on metal surfaces, such as the surfaces of metal fasteners, with which the intumescent coating material comes in contact. In addition, the intumescent coating material has a pH greater than 7.0 to reduce corrosive properties of the intumescent material and provide a chemical environment conducive to the forming of the corrosion inhibiting layer by the corrosion inhibitor.Type: GrantFiled: June 4, 1999Date of Patent: August 7, 2001Assignee: Johns Manville International, Inc.Inventors: Kenneth A. Turpin, Monroe W. Shumate, Jesse J. Beitel, III
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Patent number: 6241815Abstract: A composition for use in construction materials, which may be substituted for high performance concrete, patching materials, joint compounds, and the like, such as backer boards or panels, which includes a settable calcium sulfate, preferably a hemihydrate, Portland cement, a finely divided pozzolanic material, lime, and an aggregate, optionally including other additives. The volume ratio of the aggregate to the combined calcium sulfate, Portland cement, pozzolanic material, and lime (a cementitious binder) is equal to or greater than 2/1. Panels made from this composition are useful, particularly when exposed to water since they have good dimensional stability.Type: GrantFiled: August 10, 1999Date of Patent: June 5, 2001Assignee: United States Gypsum CompanyInventor: David Bonen
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Patent number: 6237294Abstract: The present invention relates to flexible decorative panels which simulate the appearance of natural materials such as brick, logs, wood planks, stone, masonry work, millwork, woodwork, etc., in addition to methods and kits for their preparation. The panels comprise a flexible building sheet, reinforced with a light fibrous material, fabricated by: filling a mold comprising a pattern of a natural material in relief with a fluent hardening material; submerging a reinforcing means within the hardening material; brushing the surface of hardening material; and de-molding the hardened panel.Type: GrantFiled: May 13, 1997Date of Patent: May 29, 2001Inventor: Antoni Rygiel
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Patent number: 6221521Abstract: A non-combustible gypsum/fiber board comprises two surface layers and at least one core layer, wherein the surface layers comprise a gypsum composition that is reinforced with organic fibers, and the core layer comprises a gypsum composition containing no more than about 3% by weight of organic materials.Type: GrantFiled: December 29, 1998Date of Patent: April 24, 2001Assignee: United States Gypsum Co.Inventors: Michael R. Lynn, Steven Blaine
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Patent number: 6221492Abstract: Aggregated absorbent particles having a shape similar to an ellipsoid, which has a first axis (A—A) of length (a), a second axis (B—B) of length (b) and a third axis (C—C) of length (c), the first, second and third axes being orthogonal. The lengths of the first, second and third axes are such that: a>b≧c, and the ratio (a/b) of the length (a) of the first axis (A—A) to the length (b) of the second axis (B—B) is such that: 1.05<a/b<2.50. These aggregated absorbent particles are used in a gas production unit, in particular a PSA unit with radial geometry, for implementing a process of separating a gas flow, such as air or a syngas, with a view to producing, in particular, oxygen with a purity of at least 90%, hydrogen or purified air which can subsequently be separated by cryogenic distillation.Type: GrantFiled: December 18, 1998Date of Patent: April 24, 2001Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et Exploitation des Procedes Georges ClaudeInventors: Serge Moreau, Jacques Labasque
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Patent number: 6218002Abstract: Substantially cylindrical unexpanded polystyrene beads with a diameter on the order of 1 mm and a length on the order of 3 mm are expanded into substantially cylindrical expanded polystyrene beads with a diameter between about 2 and 5 mm, and a length between about 4 and 10 mm. These expanded beads are well suited for use as a substitute for concrete aggregate to make lightweight concrete and concrete construction boards.Type: GrantFiled: December 16, 1997Date of Patent: April 17, 2001Assignee: Polysource, Inc.Inventor: Erik W. Wehtje
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Patent number: 6187440Abstract: Polymer particles made from copolymers of multifunctional (meth)acrylate monomer and multifunctional aromatic monomers are disclosed. Also disclosed are methods of improving the compression characteristics of (meth)acrylate polymer particles by copolymerizing with a multifunctional (meth)acrylate monomer a multifunctional aromatic monomer. The particles are of a size, uniformity, and contain physical characteristics that make them ideally suitable for use as spacers in liquid crystal display devices.Type: GrantFiled: July 8, 1999Date of Patent: February 13, 2001Assignee: Rohm and Haas CompanyInventor: Jiun-Chen Wu
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Patent number: 6187409Abstract: A cementitious panel comprising a cementitious core which is fabric-reinforced at the surface thereof and whose longitudinal edges are reinforced by a network of fibers. A panel may be obtained wherein the surface edge reinforcement layers are relatively strong and hard such that a nail or screw may be driven through the edge of panel without pre-drilling and without breaking, even when nailed or screwed almost at the very limit of the edge of the panel. Such a panel may provide a long lasting substrate for humid or wet areas such as shower rooms and bath rooms.Type: GrantFiled: March 30, 1998Date of Patent: February 13, 2001Assignee: National Gypsum CompanyInventor: Marc-André Mathieu
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Patent number: 6176920Abstract: The present invention relates to a cementitious structural panel and its method of manufacture. The method of manufacture involves encapsulating a top and bottom layer of porous reinforcing material with a cementitious mixture by vibration. The structural panel may be coated with a layer of waterproof material.Type: GrantFiled: June 12, 1998Date of Patent: January 23, 2001Assignee: Smartboard Building Products Inc.Inventors: Patrick B. Murphy, George Wypych
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Patent number: 6160042Abstract: A low viscosity high thermal conductivity polymer-based boron nitride composition and a surface-treated boron nitride material for use as a filler in this composition, and methods of preparation is described.Type: GrantFiled: October 1, 1998Date of Patent: December 12, 2000Assignee: Edison Polymer Innovation CorporationInventor: Hatsuo Ishida
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Patent number: 6153040Abstract: A process for reducing rollups in gypsum board panels when the panels are laminated with a laminate, is provided. A laminator is provided, as is at least one gypsum board panel, each panel having a face paper layer and a backing paper layer. Each paper layer has a coefficient of friction, and at least one of the face paper layer and the backing paper layer is treated with an agent for reducing the coefficient of friction and water absorbency. Next, a supply of laminate is provided and installed in the laminator. Then, at least one panel of the gypsum board is fed through the laminator, so that a layer of the laminate is applied thereon.Type: GrantFiled: May 15, 1998Date of Patent: November 28, 2000Assignee: United States Gypsum CompanyInventors: Evan V. Rohlf, Dick C. Engbrecht, Mark B. Scalf
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Patent number: 6136444Abstract: A transparent conductive sheet comprises a silicon oxide gas barrier layer, an organosilicon compound-containing solvent-resistant layer and a transparent conductive layer laminated in that order on one side of a transparent plastic substrate, or a polyvinyl alcohol-based resin gas barrier layer and a solvent-resistant layer laminated in that order, over an anchor coat layer.Type: GrantFiled: February 1, 1996Date of Patent: October 24, 2000Assignee: Teijin LimitedInventors: Tatsuichiro Kon, Satoshi Igarashi, Kazuo Yahata, Hiroyuki Fujishima, Yuji Tamura
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Patent number: 6114033Abstract: A saturated polyester obtained by a reaction of a polycarboxylic acid component comprising a polycarboxylic acid having 2 to 6 carbon atoms in the main chain (e.g. maleic anhydride), and a polyol component comprising a polyhydric alcohol having 2 to 4 carbon atoms or its condensate is used as a cement retarder. A retardative sheet can be formed by applying or impregnating a composition comprising the retarder and a tacky adhesive to a base sheet. By forming a predetermined pattern with the use of the retarder or sheet in a form, depositing a mortar composition, washing a surface of the hardened concrete, and washing out uncured mortar, a figure or a washing finished surface is formed on a surface of a concrete product.Type: GrantFiled: December 23, 1998Date of Patent: September 5, 2000Assignee: Daicel-Huels Ltd.Inventors: Yoshiyuki Ikemoto, Toru Ikuta
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Patent number: 6110575Abstract: The invention relates to a first gypsum-based composite article reinforced with glass fibers. This first article has a first member made of a hard gypsum, a second member made of a soft gypsum, and a mat made of the glass fibers. The mat is embedded in the article in a manner that the first and second members are bonded together by means of the mat. This first article is superior in resistance to external force acting thereon and to severe environmental conditions, even if the gypsum-based article is light in weight and thin in thickness. The invention further relates to a second gypsum-based composite article having a base plate, a glass fiber mat bonded to the base plate, and a gypsum layer formed on the glass fiber mat such that glass fibers of the glass fiber mat are embedded in the gypsum layer. This second article also has superior characteristics as those of the first article.Type: GrantFiled: November 10, 1997Date of Patent: August 29, 2000Assignee: Yoshino Sangyo Co., Ltd.Inventor: Tadashi Haga
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Patent number: 6063472Abstract: The present invention provides an architectural material obtained by forming a decorative layer containing calcium carbonate as a binder component on the surface of a base material, and laminating a ventilating protective sheet having a peeling strength of 200 to 4000 mN on the surface of the decorative layer without interposing an adhesive layer separately, and a process for producing the architectural material. The architectural material has excellent soiling resistance or abrasion resistance, and is highly practical.Type: GrantFiled: March 9, 1998Date of Patent: May 16, 2000Assignee: Tokuyama CorporationInventors: Toshihiro Takaoka, Yoshihiro Sakai, Tadashi Fujimoto
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Patent number: 6054205Abstract: The invention provides a glass fiber facing sheet for engineered surfaces such as cement boards which reduces the pitting associated with open mesh glass scrims. The glass fiber facing sheet comprises an open mesh glass scrim having a plurality of intersecting continuous multifilament yarns which are bonded at their crossover points to provide dimensional stability to the scrim. A melt blown polymer web is preferably joined to one face of the glass scrim and covers the mesh openings in the scrim. The opposed face of the scrim defines an exposed grid profile surface which is available for mechanical interaction between the scrim and the cementitious slurry used in cement boards. In cement boards, the glass fiber facing sheet of the present invention is preferably mechanically integrated into a surface portion of the cement core along the exposed grid profile of the scrim.Type: GrantFiled: May 29, 1997Date of Patent: April 25, 2000Assignee: Clark-Schwebel Tech-Fab CompanyInventors: Nicholas S. Newman, Gordon L. Brown, Jr., R. Bruce Hinton, Andrew D. Broadway, Chia-Te Chou
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Patent number: 6001496Abstract: Disclosed is a mat-faced gypsum board of the general type having a gypsum-based core formed from a gypsum slurry compressed through an extrusion ratio of at least about 3:1 wherein the fibrous mat facing on at least one side of the board has a weight per unit surface area of greater than about 1.85 lb./100 ft..sup.2 and consists essentially of inorganic fibers having a diameter of less than about 15 microns. Also disclosed are methods for manufacturing such a gypsum board and the use of such a gypsum board in exterior finishing systems, interior lath systems and as a door core.Type: GrantFiled: August 16, 1996Date of Patent: December 14, 1999Assignee: G-P Gypsum CorporationInventor: Debbie O'Haver-Smith
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Patent number: 5976718Abstract: A premix composition for producing an inorganic solid foamed mass by mixing component (A) an aqueous acidic phosphate solution of mainly polyvalent cations and phosphoric acid wherein between 0.8 and 1.75 protons of the phosphoric acid molecule of said phosphate are neutralized by the cations, which also contains one or more fillers dispersed therein, with (B) an oxide, hydroxide or polyvalent salt of a weak acid as hardener and a carbonate foaming agent. A process of producing an inorganic foamed mass using the premix composition and a solid foamed mass produced by the process are also disclosed. The process produces a relatively elastic cross-linked structure due to mainly the secondary phosphates being neutralized versus the tertiary phosphate groups.Type: GrantFiled: June 29, 1998Date of Patent: November 2, 1999Inventor: Gerhard Melcher
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Patent number: 5965234Abstract: The method of manufacturing a flexible wall covering that replicates a finish selected from a traditional encaustic finish, a traditional stone finish and a traditional plaster finish comprises the steps of adding a flexible resin to a KOLCAUSTICO solution to provide a flexible resin-KOLCAUSTICO compound; applying at least one layer of the flexible resin-KOLCAUSTICO compound to a flexible carrier sheet in a predetermined pattern; letting the one layer of the flexible resin-KOLCAUSTICO compound dry; and burnishing the one layer of the flexible resin-KOLCAUSTICO compound after drying to produce a desired sheen that replicates a finish selected from a traditional encaustic finish, a traditional stone finish and a traditional plaster finish.Type: GrantFiled: September 25, 1997Date of Patent: October 12, 1999Inventor: Michael J. Solano
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Patent number: 5952087Abstract: The object of the present invention is to improve the overall strength and interlaminar strength of a compact (green sheet) before hydrothermal reaction by using alunites, alums and aluminum sulfate having a specified specific surface area which does not require the addition of a setting retarder or a curing accelerator together with a curing agent in order to provide a method of manufacture for a lightweight calcium silicate board which does not give rise to interlaminar peeling or bursting during hydrothermal reaction and to provide such a calcium silicate board. The method of manufacture for a calcium silicate board according to the present invention is characterized by use of one or more species selected from alunites and alums with a Blaine specific surface area of 4000 cm.sup.2 /g or more or aluminum sulfate with a Blaine specific surface area of 2000 cm.sup.2 /g or more.Type: GrantFiled: August 19, 1998Date of Patent: September 14, 1999Assignee: ASK CorporationInventors: Masato Sakiyama, Takuya Asami, Tomoki Iwanaga, Yasuhide Oshio, Masaaki Oda