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| Number | Title | Issue Date |
| 7413603 | Fiberboard with improved water resistance Articles, including fiberboard, are made from a pumpable, flowable slurry including alpha-calcined calcium sulfate hemihydrate anchored in pores of host particles, alpha-calcined calcium sulfate hemihydrate, a silicone compound, magnesium oxide, and water. The magne... | 08/19/2008 |
| 7410538 | Granulated hydrophobic additive for cementitious materials A cementitious material in powder form comprising cement, also comprises sufficient of a granulated hydrophobing additive, which comprises form 5 to 15 parts by weight of an organopolysiloxane component, form 10 to 50 parts by weight of a water-soluble or water-disp... | 08/12/2008 |
| 7374610 | Wax emulsions for gypsum products Emulsions, useful for imparting water resistance to gypsum products are disclosed. The emulsions of the invention include at least one wax, an alkyl phenol and a hydrophyllic metallic salt, preferably magnesium sulfate. The emulsions of the invention do not require ... | 05/20/2008 |
| 7311770 | Granulated hydrophobic additive for gypsum compositions A hydrophobic gypsum composition is provided which contains gypsum, a granulated hydrophobing additive and a pH effecting additive in an amount sufficient to maintain the pH of the composition in the range of 8 and 12.5, in the presence of water. The granule contain... | 12/25/2007 |
| 7293941 | Methods for cementing using compositions containing salts Disulfonate salts of 2,4-pentanedione and methods for making such salts are described. The disulfonate salts are useful as cement dispersants. Cement compositions including such salts, methods for making cement compositions including such salts, and methods for perf... | 11/13/2007 |
| 7294189 | Wax emulsion preservative compositions and method of manufacture An emulsion comprising water as the continuous phase, a wax as the discontinuous phase, an emulsifier and a preservative having the general structure: wherein R1 can be a heterocycle containing nitroge... | 11/13/2007 |
| 7294195 | Water repellant gypsum compositions In at least one embodiment, the present invention relates to a gypsum composition suitable for use in the manufacture of construction materials comprising a) gypsum, b) water, and c) a water repellancy composition comprising a hydroxy-based cellulose and a siliconat... | 11/13/2007 |
| 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 |
| 7285165 | Cement compositions comprising set retarder compositions and associated methods Cement compositions are provided that comprise a hydraulic cement, water, and a set retarder composition, the set retarder composition comprising an acrylamide polymer derivative; and an iron compound. In some embodiments, cement compositions are provided that compr... | 10/23/2007 |
| 7258738 | Cementing compositions including salts Disulfonate salts of 2,4-pentanedione and methods for making such salts are described. The disulfonate salts are useful as cement dispersants. Cement compositions including such salts, methods for making cement compositions including such salts, and methods for perf... | 08/21/2007 |
| 7256227 | Polymer modified gypsum membrane and uses therefor A composition which is applied to substrate surfaces to form a membrane to provide structural reinforcement thereto and prevent the release of gases and moisture from the substrate. The composition consists of polymer resin binders and gypsum. Further provided is a ... | 08/14/2007 |
| 7244305 | Antibacterial gypsum composition for dental surgery Disclosed is an antibacterial gypsum composition for dental surgery, which eliminates pathogens transferred from the mouth of a patient, so that a dentist or others participating in dental surgery can be prevented from being infected by such pathogens during the wor... | 07/17/2007 |
| 7241819 | Method of levelling a floor A two-pack cementitious composition consisting of iii) an alkaline component comprising gypsum, an alkaline polymer, water and a hydration inhibitor, which is stable in a fluid state and which can be set and hardened upon the addit... | 07/10/2007 |
| 7238402 | Glass fibers and mats having improved surface structures in gypsum boards A gypsum board having roughened surface glass fiber reinforcement. The roughened surface of glass fiber is created by incorporating nano or micro particles of colloidal silica or clay or other inorganic particles in a silane based sizing composition. The sizing coat... | 07/03/2007 |
| 7220329 | Method for applying reference markings to wallboard during manufacture An apparatus and method for applying reference or grid markings to wallboard during the manufacturing process is disclosed. Reference or grid markings are applied to one sheet of cover paper at a location between the originating cover paper rolls and the cover paper... | 05/22/2007 |
| 7220373 | Process for lightening plasterboards Process for the manufacture of plasterboards exhibiting a core density of less than 0.77 comprising the stages of the formation of a foam from water and a surfactant composed of at least one alkyl sulphate of formula H(CH2)nOSO3... | 05/22/2007 |
| 7141284 | Drywall tape and joint Drywall tapes, drywall joints and methods for their construction are provided by this invention. The drywall tape of this invention includes a web of glass fibers and a coating disposed over a portion of the glass fibers. The coating includes a resinous binder which... | 11/28/2006 |
| 7128782 | Sulfate dispersion chromate reducer A chromium VI reducing composition comprising particles of solid material selected from the group consisting of iron (II) sulfate and tin sulfate, the particles being substantially uniformly dispersed within a liquid carrier. Methods for modifying hydratable cementi... | 10/31/2006 |
| 7052543 | Permeable cement composition and method for preparing the same The current invention provides an improved permeable cement composition for formation of downhole sand screens. The improved composition includes an effective amount of a surfactant. Addition of the surfactant to the permeable cement composition yields at least a pu... | 05/30/2006 |
| 7045008 | Low dust wall repair compound A wall repair compound useful for filling and repairing cracks, holes, and other imperfections in a wall surface includes a conventional filler material, a conventional binder material, and a dust reducing additive which reduces the quantity of airborne dust particl... | 05/16/2006 |
| 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 |
| 7033432 | Plaster composition and method of making same The present invention provides a plaster composition that includes calcined gypsum and a naphthalene sulfonate-aldehyde condensate alkali salt polymer having a weight average molecular weight from about 17,000 to about 47,000. The present invention also provides a m... | 04/25/2006 |
| 6989057 | Zeolite-containing cement composition A method and cement composition is provided for sealing a subterranean zone penetrated by a well bore, wherein the cement composition comprises zeolite, cementitious material, and water sufficient to form a slurry. ... | 01/24/2006 |
| 6982000 | Cement compositions including silane treated amorphous silica The present invention provides improved cement compositions comprising hydraulic cement, silica hydrophobicized with a mixture of organosilicon compounds and water. ... | 01/03/2006 |
| 6936099 | Lightweight joint compound containing stable air pockets Low density joint compounds, and methods for their use are disclosed. Joint compounds comprising water, calcium carbonate, a foaming agent, and a rheology modification agent contain a plurality of stable air bubbles. Joint compounds can have densities of about 4 pou... | 08/30/2005 |
| 6932863 | Gypsum product and method therefor A method for making a gypsum product water resistant, the method comprising adding a suspension of a hydrophobic substance to a gypsum slurry. ... | 08/23/2005 |
| 6902615 | Gypsum product and method therefor A method comprising adding a suspension of a hydrophobic substance to a gypsum slurry. The hydrophobic substance may impart water repellent characteristics to the gypsum, may be used as a foaming aid, density reducer, dimension stabilizer, and others, and may increa... | 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 |
| 6881258 | Mixture for the production of a high-expansion stone die The present invention refers to a mixture comprising alpha CaSO4×½ H2O, CaSO4×2 H2O, a combination of a hardening accelerator, a hardening retarder and a setting expansion inhibitor, and optionally a surfactant. ... | 04/19/2005 |
| 6843846 | Methods and compositions for cementing subterranean zones Methods and compositions for cementing subterranean zones penetrated by well bores are provided. The methods are basically comprised of the steps of providing a cement composition which comprises a hydraulic cement, sufficient water to form a slurry and a dispersing... | 01/18/2005 |
| 6805741 | Ready-mixed setting-type composition and related kit A ready-mixed composition, which sets when mixed with an activator for the reaction of calcined gypsum with water to form set gypsum, is disclosed. The composition comprises water and calcined gypsum in a weight ratio of water to calcined gypsum of from about 0.15 t... | 10/19/2004 |
| 6773822 | Antifungal gypsum board 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 a... | 08/10/2004 |
| 6739806 | Cement compositions with improved fluid loss characteristics and methods of cementing in subterranean formations The present invention provides cement compositions comprising an improved fluid loss control additive, and methods for cementing in a subterranean formation using such cement compositions. The cement compositions comprise a hydraulic cement, water, and a fluid loss ... | 05/25/2004 |
| 6680127 | Antifungal gypsum board 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 an... | 01/20/2004 |
| 6638356 | Gypsum-based building material A gypsum-based building material comprising gypsum as the main material and an anthraquinone compound incorporated.... | 10/28/2003 |
| 6565645 | Water-resistant hydraulically setting compositions A hydraulic setting composition is provided. The composition when set has improved water absorption properties. The composition contains a hydraulically setting inorganic material such as calcium sulfate and an auxiliary of the formula A(--X[--CH2 | 05/20/2003 |
| 6402832 | Wallboard joint compound The present invention is an improved wallboard joint compound comprising an inorganic joint compound such as, for example, gypsum, mixed with water, plus one or more additives selected to reduce the moisture in the gypsum compound and improve the strength... | 06/11/2002 |
| 6299970 | Fire-resistant gypsum fiberboard 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 super... | 10/09/2001 |
| 6171388 | Lightweight gypsum composition A composition of matter comprising (a) gypsum (CaSO4 . 2H2 O); (b) one or more naturally occurring or synthetic latex polymers; and (c) one or more nonionic surfactants; wherein said composition of matter has a density less than 0.64 g/cm... | 01/09/2001 |
| 6106607 | Composition for hydrophobing gypsum and methods for the preparation and use thereof A water repellent composition for gypsum containing masonry materials is disclosed. The composition contains as organohydrogensiloxane and polyvinyl alcohol, the combination of which provides unexpectedly high water repellency.... | 08/22/2000 |
