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| Number | Title | Issue Date |
| 7297301 | Process for transforming pre-used asphaltic roofing shingles into products A process for transforming pre-used asphaltic roofing shingles into products such as paving bricks, by removing foreign matter, using a comminutor that pulls shingles downwardly through a plurality of pairs of high-speed, counter-rotating, inter-meshing blades stack... | 11/20/2007 |
| 6284186 | Method for using recycled glass as a filler and reinforcement in molded plastics The use of comminuted, recycled glass powders as a filler in molded plastic parts is disclosed. The recycled glass powder has non-uniform, rounded edges and is free from contaminants such as grinding compounds, metals, inorganic, and organic waste materia... | 09/04/2001 |
| 6083431 | Method for solidifying and sealing in a toxic substance with sulfur A method for manufacturing materials solidified with sulfur, comprising the steps of bringing the water content of a mixture of sulfur and a raw material to less than 3% by weight, heating and mixing the mixture of raw materials including molten sulfur at... | 07/04/2000 |
| 5935510 | Method for using recycled glass as a filler in molded plastics The use of comminuted, recycled glass powders as a filler in molded plastic parts is disclosed. The recycled glass preferably has rounded edges, which is a distinct advantage over conventional ground glass which has extremely sharp edges. Suitable comminu... | 08/10/1999 |
| 5766524 | Reclamation of leftover concrete A method and apparatus for recovering concrete returned to the plant by delivery truck empties the delivery trucks into hoppers that dispense the so delivered left over concrete into molds designed to produce blocks of concrete suitable for regrinding int... | 06/16/1998 |
| 5762847 | Method for the re-utilization of an optical An improved optical cable having at least one light waveguide having a coating and other component parts in the form of protective sheaths of plastic material as well as potentially tensile elements and filling compounds. The improved cable being recyclab... | 06/09/1998 |
| 5702651 | Use of oriented tabular aggregate in manufacture of high-flexural-strength concrete High-flexural-strength concrete is produced by mixing wet hydraulic cement-sand mixture with coarse, flat, tabular aggregate, pouring the resulting mixture into a form in a shallow layer, vibrating the form containing the mixture, thereby orienting the co... | 12/30/1997 |
| 5500072 | Method and apparatus for recycling metal sheet-thermoplastic resin laminate composites Metal sheet-thermoplastic resin laminate composites may be effectively separated into their component metal sheet(s) and thermoplastic resin sheet or core by first pressing the laminate composite through a pair of opposing rollers in which the roller(s) m... | 03/19/1996 |
| 5492657 | Method for processing rubber products An apparatus and method for energy efficient recycling of reinforced rubber products, such as tires, conveyor belts, and the like, wherein the rubber is reinforced by cords or belts of steel, nylon, fabric and the like. The presence of the reinforcement m... | 02/20/1996 |
| 5425904 | Process for activating vulcanized waste rubber particles and a process for producing a rubber-like article using said activated waste rubber particles A process for activating vulcanized waster rubber particles by treating the waste rubber particles with a rubber latex and a curing system and drying the treated waste rubber particles. The waste rubber particles are preferably treated with 1 to 4% by wei... | 06/20/1995 |
| 5312573 | Process for extruding mixtures of thermoplastic and thermoset materials Disclosed as one embodiment is a method of producing useful articles from ground whole tire waste, which includes the steps of continuously extruding a heated mixture of ground whole tire waste and thermoplastic binder material into a continuously cooled,... | 05/17/1994 |
| 5304276 | Method and apparatus for reclaiming gypsum from waste wallboard This invention pertains to a method and apparatus for reclaiming gypsum from waste paper laminated gypsum wallboard. The invention is directed to an apparatus that is useful for separating paper laminate from gypsum wallboard comprising: a roller and a pl... | 04/19/1994 |
| 5286427 | Method of environmental cleanup and producing building material using copper mine tailings waste material A method of environmental cleanup by producing an autoclaved aerated cement building material (termed AAC) by a process that uses the available silica sand and other raw materials in mine tailings, in particular copper mine tailings from porphyry copper m... | 02/15/1994 |
| 5169588 | Solvent based plastics recycling process A solvent based plastics recycling process directly reduces large volumes of post consumer plastic waste materials by up to 500% by volume. Minimal sorting and no cleaning is required, and large percentages of contaminants are tolerated. The process yield... | 12/08/1992 |
| 5079091 | Green compact of incineration ashes of sewerage sludge and its burned product According to the present invention, incineration ashes of sewerage sludge are compacted with pressure, but without additives, to have the bulk specific gravity of 0.9-2.5. Since the green compact has sufficient strength and reduced volume in comparison wi... | 01/07/1992 |
| 4983549 | Method for recycling plastic composite materials A method is disclosed for recycling reinforced plastic composite materials. The reinforced plastic composite material is heated to separate said plastic matrix material from said reinforcement material. At least the separated reinforcement material is rec... | 01/08/1991 |
| 4847031 | Evaporating boats containing titanium diboride Self-resistance heated, electrically conductive, refractory evaporating boats containing titanium diboride can be reclaimed for reuse. If there is aluminum adhering to the boats, they are first leached in hot caustic solution to remove the aluminum. After... | 07/11/1989 |
| 4839392 | Method for recovering a solid flowable polymer medium A method of recovering a solid flowable polymer medium that is capable of being used as a pressurizing medium for high temperature molding from contaminants. A polymer mixture containing contaminants that was a solid flowable polymer medium prior to expos... | 06/13/1989 |
| 4427818 | Thermoplastic polymer concrete structure and method A thermoplastic polymer concrete block constructed of contaminated thermoplastic resin scrap, previously considered unusable and unrecyclable, and fill material produced by mixing the thermoplastic resin scrap and fill material, heating the mixed thermopl... | 01/24/1984 |
| 4410423 | Separation of spent cathode carbon and alkaline ore A method for separating the alkaline ore and spent carbon fractions contained in spent electrolytic cell cathode comprising the steps of: (a) grinding the spent cathode to a suitable particle size; (b) treating the product of step (a) with ultrasonic energy, sulfur... | 10/18/1983 |
| 4177234 | Method and apparatus for cleaning thermoplastic materials A method for cleaning thermoplastic material especially for reclaiming thermoplastic material from scrap material which includes in addition to the thermoplastic material, materials having a higher melting point than the thermoplastic, such as metal, ther... | 12/04/1979 |
