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| Number | Title | Issue Date |
| 8167999 | Three-dimensional printing material system with improved color, article performance, and ease of use A materials system and methods are provided to enable the formation of articles by three dimensional printing. The materials system includes particulate mixtures having a whitening agent and a solid particulate additive comprising an acid, the latter adapted for mod... | 05/01/2012 |
| 8088218 | Foamed slurry and building panel made therefrom A gypsum slurry is described that includes water, a hydraulic component comprising at least 50% calcined gypsum by weight based on the dry weight of the hydraulic component, foam, a defoamer and a polycarboxylate dispersant. In some embodiments of the invention, the... | 01/03/2012 |
| 7964034 | Gypsum-containing product and method for producing same 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 ... | 06/21/2011 |
| 7875114 | Foamed slurry and building panel made therefrom A gypsum slurry is described that includes water, a hydraulic component comprising at least 50% calcined gypsum by weight based on the dry weight of the hydraulic component, foam, a defoamer, a polycarboxylate dispersant having olefinic unsaturated mono-carboxylic a... | 01/25/2011 |
| 7824490 | Calcium sulfate hemihydrate treatment process A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure. ... | 11/02/2010 |
| 7819971 | Method of using landplaster as a wallboard filler A gypsum slurry includes calcium sulfate hemihydrate, water and calcium sulfate dihydrate, where the calcium sulfate dihydrate is added downstream of the mixer. In an optional embodiment, the a gypsum slurry includes calcium sulfate hemihydrate, a polycarboxy... | 10/26/2010 |
| 7815730 | Siloxane polymerization in wallboard Polymerization of siloxane is improved using a gypsum-based slurry that includes stucco, Class C fly ash, magnesium oxide and an emulsion of siloxane and water. This slurry is used in a method of making water-resistant gypsum articles that includes making an emulsio... | 10/19/2010 |
| 7803226 | Siloxane polymerization in wallboard Polymerization of siloxane is improved using a gypsum-based slurry that includes stucco, Class C fly ash, magnesium oxide and an emulsion of siloxane and water. This slurry is used in a method of making water-resistant gypsum articles that includes making an emulsio... | 09/28/2010 |
| 7776150 | Process and apparatus for handling synthetic gypsum Method and apparatus for converting wet synthetic gypsum from a flue desulphurization process (FGD) to easily handled and metered briquettes by mixing a hydraulic additive such as by-pass dust from a cement kiln with synthetic gypsum and allowing the heat from the r... | 08/17/2010 |
| 7731794 | High starch light weight gypsum wallboard 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 ... | 06/08/2010 |
| 7695561 | Alpha-type calcium sulfate hemihydrate compositions Disclosed is an improved alpha-type calcium sulfate hemihydrate. Methods of producing an improved powdered calcium sulfate hemihydrate (CaSO4.½H2O) [alpha-type] compound are disclosed, at least one method including forming calcium sulfate dihy... | 04/13/2010 |
| 7651565 | Device for drying and/or calcining gypsum A gypsum dryer/calciner (1) includes a calcining space (2), a first pipe (4) exhibiting an inlet connected to a source of hot gases (3) and an outlet emerging in the calcining space (2); a second pipe (5) exhibiting an inlet... | 01/26/2010 |
| 7637996 | Gypsum products utilizing a two-repeating unit dispersant and a method for making them A gypsum slurry includes water, a hydraulic component including stucco and a polycarboxylate dispersant. The dispersant has two repeating units wherein the first repeating unit is an olefinic unsaturated mono-carboxylic acid repeating unit or an ester or salt, and t... | 12/29/2009 |
| 7637995 | Composition for forming a composite material A composition and method for forming a composite material comprising a mixture of component A and component B, component A comprising gypsum and an inhibitor; and component B comprising an accelerator, wherein at least one of component A and component B further comp... | 12/29/2009 |
| 7601214 | Modified landplaster as a wallboard filler A gypsum slurry includes calcium sulfate hemihydrate, water and calcium sulfate dihydrate is coated with a hydrophilic, dispersible coating. The coating is less soluble than the calcium sulfate hemihydrate to delay exposure of the landplaster to the remainder of the... | 10/13/2009 |
| 7588634 | Process for manufacturing ultra low consistency alpha- and beta- blend stucco A process is disclosed for making a blend of alpha- and beta-stucco including a slurry calcination step to produce alpha calcium sulfate hemihydrate followed by a fluidized bed calcination step to produce beta calcium sulfate hemihydrate. The process starts with 50-... | 09/15/2009 |
| 7572328 | Fast drying gypsum products A slurry is made including water, at least 50% by weight calcium sulfate hemihydrate, and a specific polycarboxylate dispersant prepared using at least three repeating units. A first repeating unit is a vinyl ether-type repeating unit. A second repeating unit includ... | 08/11/2009 |
| 7556685 | Composition of architectural papier-mâché and articles made therewith The invention is a composition of an architectural papier-mâché, and articles made therewith. Articles formed from using the architectural papier-mâché have excellent weather resistance, and can be used outdoors, as well as indoors. The composition is comprised ... | 07/07/2009 |
| 7507287 | Activated carbon as mercury release control agent in gypsum calcination A method for providing effective mercury release control during gypsum calcination is disclosed. The method comprises providing a reactor and gypsum containing mercury; providing a mercury sorbent, such as activated carbon and/or derivatives thereof in the reactor; ... | 03/24/2009 |
| 7488383 | Gypsum products and method for their manufacture A method is provided which uses an improved emulsion to imparting water-resistance to gypsum products. In one embodiment, gypsum products comprise calcium sulfate dihydrate and an emulsion which comprises a saponified wax, a nonsaponifiable wax, an alkyl phenol, a s... | 02/10/2009 |
| 7427321 | Foamed fireproofing composition and method Disclosed are formulations adapted to form a foamed cementitious composition, the foamed cementitious composition itself, a method of forming a hydraulic binder foam, and a method of conveying and applying the resulting foam to a substrate. A pumpable cementitious s... | 09/23/2008 |
| 7425236 | Gypsum-containing board and tile, and method for producing same 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 ... | 09/16/2008 |
| 7407545 | Cementitious veneer and laminate material A cementitious veneer and laminate composition is provided. The cementitious laminate composition includes a substrate, a primer layer applied to the substrate, the primer layer comprising a mixture of polyvinyl alcohol catalyst, Portland cement, and sand; and a cem... | 08/05/2008 |
| 7402205 | Composition comprising water- and air-hardenable binders and its use notably to the preparation of a product having the aspect of a natural stone Composition comprising water- and air-hardenable binders and its use notably to the preparation of a product having the aspect and the properties of a natural stone. Composition comprising water- and air-hardenable binders, exhibiting after hardening properti... | 07/22/2008 |
| 7393424 | Gypsum composition A gypsum composition comprising water, stucco, clay, an amine compound, a polyoxyalkylene, and a comb-branched copolymer is disclosed. The gypsum composition has improved fluidity. A method for preparing the gypsum composition is also disclosed. The method comprises... | 07/01/2008 |
| 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 |
| 7364015 | Acoustical panel comprising interlocking matrix of set gypsum and method for making same An acoustical panel comprising a continuous phase of an interlocking set gypsum matrix and a method of preparing an acoustical panel are disclosed. ... | 04/29/2008 |
| 7337587 | Construction assembly of plaster boards and a method of assembling a plurality of plaster boards A construction assembly includes a plurality of plaster boards, each of the plaster boards having a plaster body and at least one sheet of liner, the liner including an inner surface attached to the plaster body and an outer surface having an outer face; wherein sai... | 03/04/2008 |
| 7335254 | Alpha-type calcium sulfate hemihydrate compositions and methods of making same Disclosed is an improved alpha-type calcium sulfate hemihydrate. Methods of producing an improved powdered calcium sulfate hemihydrate (CaSO4.½H2O) [alpha-type] compound are disclosed, at least one method including forming calcium sulfate dihy... | 02/26/2008 |
| 7332026 | Cementitious compositions containing interground cement clinker and zeolite Methods and compositions for wellbore treating fluids, especially cementitious compositions that include interground cement clinker and zeolite, with and without gypsum. ... | 02/19/2008 |
| 7326291 | Cementitious compositions containing interground cement clinker and zeolite Methods and compositions for wellbore treating fluids, especially cementitious compositions that include interground cement clinker and zeolite, with and without gypsum. ... | 02/05/2008 |
| 7303015 | Cementitious compositions containing interground cement clinker and zeolite Methods and compositions for wellbore treating fluids, especially cementitious compositions that include interground cement clinker and zeolite, with and without gypsum. ... | 12/04/2007 |
| 7296626 | Liquid additive for reducing water-soluble chromate Methods for cementing and cement compositions are provided, wherein the cement composition comprises cementitious material and an aqueous suspension of zeolite and a chromate reducing agent. ... | 11/20/2007 |
| 7291179 | Bone graft substitute composition Bone graft substitute compositions and methods of making the compositions are disclosed. In some embodiments, a method of making a composition includes contacting a mixing solution with a first mixture having calcium sulfate hemihydrate and a plasticizing material t... | 11/06/2007 |
| 7285166 | Zeolite-containing cement composition Methods and cement compositions are provided for sealing a subterranean zone penetrated by a wellbore, wherein the cement composition comprises zeolite, cementitious material, and a mixing fluid. ... | 10/23/2007 |
| 7285164 | Fluid loss additives for cement slurries Methods for cementing in a subterranean zone, which use a cement composition that includes zeolite, cementitious material, proportioned fluid loss control additives and a mixing fluid. Cement compositions containing proportioned fluid loss control additives, and met... | 10/23/2007 |
| 7276115 | Conformable coating A conformable coating for application to a soil substrate for barrier, adhesive, and planting properties includes a mixture of recycled or virgin materials, including organic fibrous material from wood based material and cotton based material, and gypsum bearing mat... | 10/02/2007 |
| 7267888 | Products containing an anti-fungal amount of a salt of formic acid A building material adapted for controlling growth of vegetative fungi from spores having a compressed calcium sulfate layer, a paper layer over the sulfate layer, an adhesive for securing the paper layer to the sulfate layer; an amount of between about 30 wt % to 5... | 09/11/2007 |
| 7261772 | Gypsum composition A gypsum composition comprising water, stucco, clay, an amine compound, a polyoxyalkylene, and a comb-branched copolymer is disclosed. The gypsum composition has improved fluidity. A method for preparing the gypsum composition is also disclosed. The method comprises... | 08/28/2007 |
| 7247282 | Method for the removal of metals from an aqueous solution using lime precipitation The invention relates to a method for the removal of metals from their aqueous solution with lime precipitation, in conditions where a precipitate of metal hydroxide and gypsum is formed, which settles well and is easy to filter. The metals are precipitated from the... | 07/24/2007 |
