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...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 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 |
| 7267720 | Method for preparing a building material A method of preparing a building material is provided. An aggregate material, water, a hydraulic binder material, and one or more hydraulic activators are mixed. The hydraulic binder material comprises slag material. The mixture is allowed to harden. A building mate... | 09/11/2007 |
| 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 |
| 6793851 | Process for manufacturing infrastructures based on vitrified blast-furnace slag and additive used A process for constructing infrastructures, in which aggregates, vitrified blast-furnace slag, a pulverulent activator and water are mixed together, the mix is spread out over the ground, compacted and left to harden, and in which a particulate slag and a ready-prep... | 09/21/2004 |
| 6776839 | Slag cement A slag cement having an improved early strength and containing aluminosilicates, blast furnace slag, clinker and CaSO4, has a content of 70 to 95% by weight of blast furnace slag used in the ground form at >4,500 Blaine (cm2/g) with no more tha... | 08/17/2004 |
| 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 |
| 6409819 | Alkali activated supersulphated binder The invention describes an activated supersulphated aluminosilicate binder containing aluminosilicates, calcium sulphate and an activator containing alkali metal salts, wherein the aluminosilicates are selected from the group consisting of blast furnace s... | 06/25/2002 |
| 6406537 | High-strength joint compound A composition comprising calcined gypsum, trimetaphosphate ion, and a water-soluble linear polymer formed by the addition reaction of ethylene oxide and/or alkoxy-substituted ethylene oxide with water, having enhanced strength when set and exhibiting high... | 06/18/2002 |
| 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 |
| 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 |
| 6139621 | Process for producing sulfate cement or sulfate cement aggregates Sulfate cement or sulfate cement aggregates are produced herein by a process in which hydraulically active synthetic slags having slag basicities CaO/SiO2 of between 1.35 and 1.6, Al2 O3 contents of 10% by weight to 20% by... | 10/31/2000 |
| 5997632 | Blended hydraulic cement The present invention is directed to blended hydraulic cement compositions which are formed with subbituminous fly ash. In one embodiment, the cement composition comprises from about 0.1 wt. % to about 7 wt. % of a retarding agent; from about 0.1 wt. % to... | 12/07/1999 |
| 5980627 | Production of commercially useful materials for waste gypsum boards A commercially useful material is produced from waste gypsum boards containing calcium sulfate dihydrate, by a method comprising the steps of (a) grinding the waste gypsum boards to obtain particles having a substantially uniform size; (b) drying the part... | 11/09/1999 |
| 5968258 | Method of making cement from base metal smelter slag A method of making cement from base metal smelter slag produced by a nickel, copper, lead or zinc smelter, includes crushing the slag with a source of calcium sulphate to a size of less than about 1/4 inch and heating the mixture to produce a cement, and ... | 10/19/1999 |
| 5916362 | Method for producing cement using manganese slag as raw material A method for producing cement is disclosed. The method has the advantages that a setting time can be shortened as compared with conventional cement, and a manganese slag can be treated at low cost without giving load to environment, by using the manganese... | 06/29/1999 |
| 5883024 | Fibrous mat and mat-faced gypsum board Disclosed are fibrous mat-faced gypsum boards with improved resistance to skin irritation and itching. The boards include a mat facing in which the fibrous portion thereof comprises both inorganic and organic fibers, with organic fibers preferably being p... | 03/16/1999 |
| 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 |
| 5855667 | Gypsum mixture containing hydrophobic additive and method for hydrophobing gysum A gypsum mixture is disclosed which has hydrophobic additive substantially uniformly dispersed therein and which comprises gypsum, a first silane of the general formula (RO)3 SiR or of the general formula (RO)2 SiR2, and a... | 01/05/1999 |
| 5776245 | Method for hydrophobing gypsum A method for preparing an aqueous gypsum mixture having hydrophobic additive substantially uniformly dispersed therein, which method comprises admixing in water gypsum, a silane of the general formula (RO)3 SiR' or the general formula (RO)... | 07/07/1998 |
| 5683616 | Process for preparing ceramic-like materials and the ceramic-like materials This invention relates to a process for preparing ceramic-like materials with specific properties by binding an inorganic filler in the form of a dry composition with a grain size of up to 25 μm containing in the volume ratio 1:0.-1.52 a waste phosphogyp... | 11/04/1997 |
| 5482543 | Multipurpose, ecological water-paint A new and original water paint is disclosed, in liquid form, such as a milky emulsion, containing a low amount of water and comprising minerals, acetic acid solution, and other components. The new water paint has bactericidal, fireproof, transpiring, ecol... | 01/09/1996 |
| 5457262 | Preparation of inorganic hardenable slurry and method for solidifying wastes with the same The present invention discloses a method for preparing the inorganic hardenable slurry and the use of same in the solidification of wastes. In addition to water, the essential parts of the slurry are inorganic components including borates, cement-base pow... | 10/10/1995 |
| 5366549 | Method for fabricating fiber-reinforced slag gypsum cement-based, lightweight set articles A method is provided for making a fiber-reinforced slag gypsum cement lightweight hardened product. The method consists essentially of mixing (1) from 5 to 140 parts by weight of aggregates having a maximum size of not larger than 2000 μm to (2) 100 part... | 11/22/1994 |
| 5273581 | Method of making a hydraulic binder settable upon combination with water Calcium sulfate alpha hemihydrate and foundry sand are milled to cement fineness and form a hydraulic binder, as a mixture with both high early setting strength and excellent water resistance. The composition relies upon a sulfate activation of the foundr... | 12/28/1993 |
| 5256349 | Light weight formed body and method for producing the same A light weight formed body used for building materials, heat-insulating materials, furnitures, backing materials and the like, and a method for producing the same. In the light weight formed body and in the manufacturing method thereof, the principal mate... | 10/26/1993 |
| 5194091 | Geopolymer-modified, gypsum-based construction materials Geopolymer-modified gypsum construction materials. Compositions derived from combining geopolymer adhesives with conventional gypsum wallboard slurry formulations produce an interpenetrating network (IPN) which cures by loss of process water to a refracto... | 03/16/1993 |
| 5169617 | Method of treating produced gypsum A method for treating produced gypsum and, in particular, a method for treating flue-gas desulfurization gypsum forms highly active, modifiable gypsum binders of high strength with simultaneously drying, deagglomerating and dehydrating. Pursuant to the in... | 12/08/1992 |
| 5164004 | High permeability metal casting plaster and method of making same A high permeability metal casting plaster is used for production of high accuracy simulated castings for prototypes and any other plastermold castings. Methods are provided that create the high permeability metal casting plaster and mold. Also, a high per... | 11/17/1992 |
| 5158835 | Acid rain neutralizing block, method of making such blocks and method of neutralizing acidified surface water Blocks, weighing about 35 lbs., formed of a homogeneous mixture of about 75% gypsum and 25% lime, are strategically placed in surface water that is being damaged by acid rain, where, by timed release of lime, the pH of the water is maintained at about 6.5... | 10/27/1992 |
| 5108679 | Process for the production of concrete building products A process for the production of concrete roofing products of reduced weight loading having a thickness in section of not greater than 15 mm. The process involves forming an asbestos-free cementitious composition comprising (i) lightweight aggregate, (ii) ... | 04/28/1992 |
| 5017234 | Processing additives for blended cements This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C4 AF, when mi... | 05/21/1991 |
| 4981519 | Hydraulic hardening material and method of manufacturing the same The invention provides a method of manufacturing a hydraulic hardening material having the steps of milling vitreous blast furnace slag and classifying the milled slag to provide slag powder having a blaine specific surface area of 6,000 to 12,000 cm... | 01/01/1991 |
| 4964912 | Heat-curing cement composition, method of hardening same, and hardened body formed therefrom A heat-curing cement composition comprising 60 to 75% by weight of 3CaO.SiO2, in which the total content of 3CaO.Al2 O3 and 4CaO.Al2 O3.Fe.sub.2 O3 is lower than 10% by weight, the alkali c... | 10/23/1990 |
| 4859243 | Carbon fiber-reinforcing gypsum models and forming molds, gypsum powder materials for making such models and molds, and a method for producing them Gypsum models and molds made of a dihydrate gypsum (CaSO4 .multidot.2H2 O) having uniformly dispersed therein carbon fibers having a predetermined length in a defined range of amount are described. The molds include various types of ... | 08/22/1989 |
| 4724242 | Open cell foamed gypsum absorbents An open-cell, foamed gypsum absorbent for fluids is prepared by foaming a slurry containing plaster, carbonaceous material, and a weak acid. Some of the preferred carbonaceous material include activated carbon, dried blood, comminuted vegetable matter con... | 02/09/1988 |
| 4687694 | Decorative tile A gypsum plaster and chopped glass fiber tile having increased insulation values, reduced weight and reduced density due to the presence of vermiculite and perlite.... | 08/18/1987 |
| 4673543 | Method of producing hardened inorganic products A method of producing hardened inorganic products is characterized in that a hydraulic material comprising slag as an effective component is mixed with gypsum and water, and mixture is then shaped and aged at an internal temperature of 50° to 100° C. to... | 06/16/1987 |
| 4670039 | Timed release fertilizer composition and means A controlled slow release fertilizer composition comprising an encapsulated fertilizer, carbon and plaster.... | 06/02/1987 |
| 4451295 | Cements, mortars and concretes An improved cement for making concrete and mortar comprises a blend of ground calcium carbonate or Portland cement kiln dust, or both, and ground, granulated blast furnace slag. While its physical and chemical characteristics differ from Portland cement, ... | 05/29/1984 |
| 4445937 | Pneumatic stowing of construction material comprising calcium alpha- and beta-sulphate hemihydrates An improved method for pneumatic stowing of calcium alpha-sulphate hemihydrate, calcium beta-sulphate hemihydrate or mixtures thereof using natural anhydrite, limestone or mixtures thereof is disclosed. In addition, construction reinforcement compositions... | 05/01/1984 |
