Patents by Inventor David J. Romenesko
David J. Romenesko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5508323Abstract: A free-flowing silicone polymer powder, having an average particle size of 1 to 1000 microns and prepared by mixing a polydiorganosiloxane with a silica filler, is uniformly dispersed in an organic resin using conventional equipment, such as a single screw or, preferably, a twin screw extruder. When employed at a concentration of about 0.5 to 25 parts by weight of powder per 100 parts by weight of resin, a significant improvement in the burn character of the modified resin is obtained such that the rate of heat release, generation of smoke and evolution of toxic carbon monoxide gas is significantly reduced relative to the unmodified resin.Type: GrantFiled: October 11, 1994Date of Patent: April 16, 1996Assignee: Dow Corning CorporationInventors: David J. Romenesko, Robert R. Buch
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Patent number: 5438097Abstract: A crumb-like silicone rubber powder is uniformly dispersed in a polystyrene polymer using conventional equipment, such as a twin screw extruder, to provide a resin having up to a ten fold improvement in impact strength over the unmodified polymer. The novel silicone rubber powder of the invention is prepared by isolating the particles obtained from a polymerization of an unsaturated monomer in the presence of an aqueous emulsion of a hydroxyl-functional polydiorganosiloxane which has been precured using an organotin curing catalyst and a crosslinker which contains unsaturated functionality.Type: GrantFiled: January 18, 1994Date of Patent: August 1, 1995Inventors: Donald T. Liles, Kenneth M. Lee, David J. Romenesko, James W. White, David L. Murray
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Patent number: 5412014Abstract: A free-flowing silicone polymer powder, said powder having an average particle size of 1 to 1000 microns and being prepared by mixing a polydiorganosiloxane with a silica filler, and a phosphorus-based fire retardant compound are uniformly dispersed in an organic resin using conventional equipment, such as a single screw extruder. The resulting resin composition shows a significant improvement in fire retardancy but does not exhibit the severe deterioration of impact resistance incurred when the resin is modified with only phosphorus-based fire retardant.Type: GrantFiled: October 26, 1993Date of Patent: May 2, 1995Assignee: Dow Corning CorporationInventor: David J. Romenesko
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Patent number: 5403891Abstract: A composition useful in the fabrication of extruded articles contains a thermoplastic resin such as polyethylene and from 100-3,000 parts per million of a lubricant which is (i) an organosilicon resinous copolymer having a number average molecular weight of between 1,200-10,000 and R.sub.3 SiO.sub.1/2, R.sub.2 SiO.sub.2/2, RSiO.sub.3/2 and SiO.sub.4/2 units, wherein R is a C.sub.1 -C.sub.6 alkyl, aryl, alkenyl and/or trifluoropropyl radical(s); or (ii) the organosilicon resinous copolymer and a siloxane polymer R.sub.3 SiO(R.sub.2 SiO).sub.n SiR.sub.3 wherein R is as defined heretofore and n is 1-100,000; or (iii) the organosilicon resinous copolymer and an absorbing filler such as silica; or (iv) the organosilicon resinous copolymer, the siloxane polymer and an absorbing filler.Type: GrantFiled: April 8, 1994Date of Patent: April 4, 1995Assignee: Dow Corning CorporationInventor: David J. Romenesko
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Patent number: 5391594Abstract: A free-flowing silicone polymer powder, having an average particle size of 1 to 1000 microns and prepared by mixing a polydiorganosiloxane with a silica filler, is uniformly dispersed in an organic resin using conventional equipment, such as a single screw or, preferably, a twin screw extruder. When employed at a concentration of about 0.5 to 25 parts by weight of powder per 100 parts by weight of resin, a significant improvement in the burn character of the modified resin is obtained such that the rate of heat release, generation of smoke and evolution of toxic carbon monoxide gas is significantly reduced relative to the unmodified resin.Type: GrantFiled: June 29, 1992Date of Patent: February 21, 1995Assignee: Dow Corning CorporationInventors: David J. Romenesko, Robert R. Buch
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Patent number: 5356585Abstract: A method of extruding a synthetic thermoplastic resin in which a processing aid in the form of a lubricant is added to the thermoplastic resin in order to facilitate processing of the thermoplastic resin. The improvement resides in using an organosilicon resinous composition as the lubricant for the thermoplastic resin.Type: GrantFiled: July 1, 1993Date of Patent: October 18, 1994Assignee: Dow Corning CorporationInventor: David J. Romenesko
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Patent number: 5145977Abstract: There is disclosed a herbicide composition in which a postemergent herbicide is activated by the inclusion of a silicone glycol adjuvant consisting essentially of (i) a silicone glycol having an average structure ##STR1## wherein Me denotes a methyl radical, and (ii) a silicone glycol dispersant compound for component (i). When compared to similar prior art silicone glycol adjuvants not having an acetoxy terminated glycol chain, the compositions of the present invention provide enhanced rainfastness in the control of weeds, particularly velvetleaf plants.Type: GrantFiled: February 26, 1990Date of Patent: September 8, 1992Assignee: Dow Corning CorporationInventors: Lenin J. Petroff, David J. Romenesko, Bradley C. Bahr
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Patent number: 5145978Abstract: There is disclosed a herbicide composition in which a postemergent herbicide is activated by the inclusion of a silicone glycol adjuvant consisting essentially of (i) a silicone glycol having an average of 4 or 5 ethylene oxide units in its glycol chain and (ii) a silicone glycol dispersant compound for component (i). The composition provides enhanced phytotoxicity in the control of weeds, particularly velvetleaf plants, and shows an improved degree of rainfastness relative to prior art compositions.Type: GrantFiled: February 11, 1991Date of Patent: September 8, 1992Assignee: Dow Corning CorporationInventors: Lenin J. Petroff, David J. Romenesko, Robert A. Ekeland
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Patent number: 5136068Abstract: The specification discloses an organopolysiloxane-polyoxyalkylene emulsifier for polar in nonpolar liquid emulsions wherein organopolysiloxane-polyoxyalkylene polymer molecules are intentionally cross linked through a cross linking agent joined thereto by nonhydrolyzable bonds and being free of internal hydrolyzable bonds.Type: GrantFiled: April 26, 1989Date of Patent: August 4, 1992Assignee: Dow Corning CorporationInventors: Bradley C. Bahr, Peter Y. Lo, A. Wade Lomas, David J. Romenesko
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Patent number: 5017216Abstract: There is disclosed a herbicide composition in which a postemergent herbicide is activated by the inclusion of a silicone glycol adjuvant consisting essentially of (i) a silicone glycol having an average of 4 or 5 ethylene oxide units in its glycol chain and (ii) a silicone glycol dispersant compound for component (i). The composition provides enhanced phytotoxicity in the control of weeds, particularly velvetleaf plants, and shows an improved degree of rainfastness relative to prior art compositions.Type: GrantFiled: April 11, 1990Date of Patent: May 21, 1991Assignee: Dow Corning CorporationInventors: Lenin Petroff, David J. Romenesko, Robert A. Ekeland
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Patent number: 4990175Abstract: There is disclosed a herbicidal composition in which a foliar-applied herbicide is activated by the inclusion of a silicone glycol-silicone alkane terpolymer adjuvant. The composition provides enhanced phytotoxicity in the control of narrowleaf weeds, particularly Barnyardgrass, Quackgrass and Johnsongrass, and often also shows an improved degree of rainfastness relative to similar herbicidal compositions employing prior art silicone glycol adjuvants.Type: GrantFiled: December 13, 1989Date of Patent: February 5, 1991Assignee: Dow Corning CorporationInventors: Lenin J. Petroff, David J. Romenesko, Robert A. Ekeland
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Patent number: 4933002Abstract: There is disclosed a herbicide composition in which a postemergent herbicide is activated by the inclusion of a silicone glycol adjuvant consisting essentially of (i) a silicone glycol having an average structure ##STR1## wherein Me denotes a methyl radical, and (ii) a silicone glycol dispersant compound for component (i). When compared to similar prior art silicone glycol adjuvants not having an acetoxy terminated glycol chain, the compositions of the present invention provide enhanced rainfastness in the control of weeds, particularly velvetleaf plants.Type: GrantFiled: November 21, 1989Date of Patent: June 12, 1990Assignee: Dow Corning CorporationInventors: Lenin J. Petroff, David J. Romenesko, Bradley C. Bahr
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Patent number: 4853474Abstract: The specification discloses an organopolysiloxane-polyoxyalkylene emulsifier for polar in nonpolar liquid emulsions wherein organopolysiloxane-polyoxyalkylene polymer molecules are intentionally cross linked through a cross linking agent joined thereto by nonhydrolyzable bonds and being free of internal hydrolyzable bonds.Type: GrantFiled: July 8, 1987Date of Patent: August 1, 1989Assignee: Dow Corning CorporationInventors: Bradley C. Bahr, Peter Y. Lo, A. Wade Lomas, David J. Romenesko
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Patent number: 4785041Abstract: Thixotropic, silica-filled coating compositions wherein the curable film-forming material is an organosiloxane copolymer resin include a liquid polydiorganosiloxane containing hydroxyl-terminated polyoxypropylene units as the flow control agent. The compositions are particularly useful as screen printable passivation coatings for semiconductor devices.Type: GrantFiled: December 31, 1987Date of Patent: November 15, 1988Assignee: Dow Corning CorporationInventors: Robert C. Antonen, Diane M. Rasch, David A. Sierawski, David J. Romenesko
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Patent number: 4640792Abstract: A random siloxane copolymer composition, and a process for using the composition in a hydraulic brake system of a vehicle, is described. The random copolymer consists essentially of alkylmethylsiloxane and dimethylsiloxane units, wherein said alkyl group contains from five to ten carbon atoms, and the viscosity of said fluid is 15-50 cS at 25.degree. C. Within a relatively narrow compositional range, these fluids dissolve at least 15% less air than comparable polydimethylsiloxane fluids. Moreover, the copolymer may be readily formulated into brake fluid compositions which meet Department of Transportation (DOT 5) and, in the case of preferred compositions, Military (MIL-B-46176) specifications. The potential benefit of reduced air solubility is an improved margin of safety under harsh driving conditions.Type: GrantFiled: November 25, 1985Date of Patent: February 3, 1987Assignee: Dow Corning CorporationInventors: Eugene D. Groenhof, David J. Romenesko, Rick D. Streu
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Patent number: 4381241Abstract: The preparation of emulsions of light and heavy brines in a liquid hydrocarbon is described, using a polydiorganosiloxane bearing at least one polyoxyalkylene radical and at least one monovalent hydrocarbon radical having from 6 to 18 carbon atoms. The emulsions are useful in the well-drilling art as drilling fluids, completion fluids, packer fluids, spacer fluids and workover fluids because of their thermal stability and because they can be formulated to have a relatively high density, with or without added weighting agents.Type: GrantFiled: February 23, 1981Date of Patent: April 26, 1983Assignee: Dow Corning CorporationInventors: David J. Romenesko, Harry M. Schiefer
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Patent number: 4163082Abstract: The surface tack of a silicone gel or grease which is adheringly disposed on a substrate is decreased by coating the surface of the disposed gel or grease with a U.V.-curable organopolysiloxane liquid composition and exposing the coating to ultraviolet light until it is converted to a solid, non-tacky state. The U.V.-curable organopolysiloxane liquid composition comprises a curable mixture of an organopolysiloxane bearing olefinic radicals and an organopolysiloxane bearing silicon-bonded hydrogen radicals and/or silicon-bonded mercaptoalkyl radicals. The cured organopolysiloxane coating is easily penetrated, if desired, to provide access to the tacky silicone.Type: GrantFiled: October 23, 1978Date of Patent: July 31, 1979Assignee: Dow Corning CorporationInventor: David J. Romenesko