Patents by Inventor Larry N. Lewis

Larry N. Lewis 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).

  • One part heat curable organopolysiloxane compositions
    Patent number: 5132442
    Abstract: Shelf stable heat curable mixtures of vinyl substituted organopolysiloxane fluid and siloxane hydride are provided. The one part polyorganosiloxane mixtures are catalyzed with an inclusion compound of a cyclodextrin and a complex of a cyclopentadiene, 1,5-cyclooctadiene or norbornadiene and a platinum group metal material, such as a C.sub.(1-4) alkyl substituted platinum or a rhodium halide.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: July 21, 1992
    Assignee: General Electric Company
    Inventors: Chris A. Sumpter, Larry N. Lewis, Kevin X. Lettko, Mark W. Davis
  • One part heat curable organopolysiloxane compositions
    Patent number: 5122585
    Abstract: One part heat curable organopolysiloxane compositions are provided which utilize a vinyl containing organopolysiloxane composition, a siloxane hydride, an effective amount of a platinum group metal catalyst and a sufficient amount of an azodicarbonyl compound as an inhibitor which is free of ester linkages.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: June 16, 1992
    Assignee: General Electric Company
    Inventors: Chris A. Sumpter, Larry N. Lewis
  • One part heat curable organopolysiloxane compositions
    Patent number: 5106939
    Abstract: Shelf stable heat curable mixtures of vinyl substituted organopolysiloxane fluid and siloxane hydride are provided. The one part polyorganosiloxane mixtures are catalyzed with an inclusion compound of a cyclodextrin and a complex of a cyclopentadiene, 1,5-cyclooctadiene or norbornadiene and a platinum group metal material, such as a C.sub.(1-4) alkyl substituted platinum or a rhodium halide.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: April 21, 1992
    Assignee: General Electric Company
    Inventors: Chris A. Sumpter, Larry N. Lewis, Kevin X. Lettko, Mark W. Davis
  • Encapsulated palladium complexes and one part heat curable organopolysiloxane compositions
    Patent number: 5089582
    Abstract: Inclusion compounds of a cyclodextrin, such as .beta.-cyclodextrin, and a palladium halide-diene complex, such as a complex of PdCl.sub.2 and 1,5-cyclooctadiene have been found to be effective hydrosilylation catalysts. One part heat curable organopolysiloxane compositions are also provided.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: February 18, 1992
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • One part heat curable organopolysiloxane compositions
    Patent number: 5025073
    Abstract: Shelf stable heat curable mixtures of vinyl-substituted organopolysiloxane fluids and siloxanehydride are provided. These one part organopolysiloxane mixtures are catalyzed with an inclusion compound of a platinum metal complex, such as a complex of a platinum halide and 1,5-cyclooctadiene and a cyclodextrin.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: June 18, 1991
    Assignee: General Electric Company
    Inventors: Larry N. Lewis, Chris A. Sumpter
  • One part heat curable organopolysiloxane compositions
    Patent number: 5015691
    Abstract: A one part heat curable organopolysiloxane composition is provided having an olefinically unsaturated organopolysiloxane, and an organohydrogenpolysiloxane, and a platinum catalyst encapsulated in an organic polymer such as a thermoplastic organic polymer, or a thermosetting organic polymer.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: May 14, 1991
    Assignee: General Electric Company
    Inventors: Larry N. Lewis, Tony C. Chang
  • Flame retardant aromatic polycarbonate compositions
    Patent number: 5010148
    Abstract: Flame retardant compression moldable aromatic thermoplastic polycarbonate compositions are provided capable of satisfying the UL-94 V-O requirements and substantially lowering the heat and smoke emitted during burning. The aromatic thermoplastic polycarbonates utilize an aromatic polycarbonate resin in combination with an effective amount of a silicate resin having condensed triorganosiloxy units such as trimethylsiloxy units and diorganosiloxy units such as methylvinylsiloxy units.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: April 23, 1991
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • Flame retardant, halogen free aromatic polycarbonate copolymer blends
    Patent number: 4996255
    Abstract: Flame retardant halogen-free aromatic polycarbonate copolymer blends are provided of certain triarylsilicon materials, such as hexaphenyldisiloxane with an aromatic polycarbonate copolymer which includes polyester carbonates having condensed silphenylenecarbonyl units. The aromatic polycarbonate blends can be injection molded at thicknesses of 1/16" to provide thermoplastics capable of satisfying the V-O requirements of the UL-94 test.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: February 26, 1991
    Assignee: General Electric Company
    Inventors: Gary C. Davis, Larry N. Lewis
  • Rhodium colloid, method of making, and use
    Patent number: 4992573
    Abstract: A rhodium colloid has been found to be a superior catalyst for the hydrosilylation of silicon hydride having two or three hydrogens attached to silicon. The rhodium colloid is made by effecting reaction between rhodium trichloride and certain silicon hydride.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: February 12, 1991
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • Substantially transparent flame retardant aromatic polycarbonate compositions
    Patent number: 4954549
    Abstract: Flame retardant aromatic polycarbonate blends are provided which are capable of being tested V-O under UL-94 test conditions. A triarylsilicon material such as triphenylsilanol is incorporated into the aromatic polycarbonate to provide transparent, flame retardant compression moldable thermo-plastics capable of satisfying the UL-94 V-O requirement at 1/16".
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: September 4, 1990
    Assignee: General Electric Company
    Inventors: Larry N. Lewis, Stephen C. Bunnell
  • Rhodium colloid, method of making, and use
    Patent number: 4946818
    Abstract: A rhodim colloid has been found to be a superior catalyst for the hydrosilylation of silicon hydride having two or three hydrogens attached to silicon. The rhodium colloid is made by effecting reaction between rhodium trichloride and certain silicon hydride.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: August 7, 1990
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • Method for reducing silicone foam density and silicone foam compositions
    Patent number: 4851452
    Abstract: A method is provided for reducing the density of silicone foam from a platinum catalyzed foamable two-package mixture of vinyl organosiloxane, organohydrogen siloxane, and hydroxylated material. The platinum catalyst used in the foamable mixture is in the form of a mixture of a platinum vinyl siloxane and a platinum triarylphosphine. A platinum catalyst mixture of platinum vinylsiloxane and triarylphosphine also has been found effective.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: July 25, 1989
    Assignee: General Electric Company
    Inventors: David C. Gross, Larry N. Lewis, Connie L. Haig
  • Method for reducing silicone foam density and silicone foam compositions
    Patent number: 4840974
    Abstract: A method is provided for reducing the density of silicone foam from a platinum catalyzed foamable two-package mixture of vinyl organosiloxane, organohydrogen siloxane, and hydroxylated material. The platinum catalyst used in the foamable mixture is in the form of a mixture of a platinum vinyl siloxane and a platinum triarylphosphine. A platinum catalyst mixture of platinum vinylsiloxane and triarylphosphine also has been found effective.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: June 20, 1989
    Assignee: General Electric Company
    Inventors: David C. Gross, Larry N. Lewis, Connie L. Haig
  • Hydrosilylation catalyst, method for making and use
    Patent number: 4705765
    Abstract: A colloidal hydrosilylation catalyst is provided by effecting reaction between a silicon hydride or a siloxane hydride and a Pt(O) or Pt(II) catalyst. The colloidal catalyst forms stable mixtures with olefinically unsaturated organopolysiloxanes.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: November 10, 1987
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • Hydrosilylation catalyst, method for making and use
    Patent number: 4681963
    Abstract: A colloidal hydrosilylation catalyst is provided by effecting reaction between a silicon hydride or a siloxane hydride and a Pt(O) or Pt(II) catalyst. The colloidal catalyst forms stable mixtures with olefinically unsaturated organopolysiloxanes.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: July 21, 1987
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • Heat curable organopolysiloxane compositions
    Patent number: 4645815
    Abstract: Cyclometallized platinum phosphite catalysts have been found to provide heat curable organopolysiloxanes having superior shelf life without the use of a platinum inhibitor.
    Type: Grant
    Filed: October 31, 1985
    Date of Patent: February 24, 1987
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • Hydrogenation of unsaturated hydrocarbons with cyclometallated transition metal catalysts
    Patent number: 4645849
    Abstract: A method for hydrogenating olefins and alkynes is provided wherein the unsaturated hydrocarbon is reacted under mild conditions in the presence of a cyclometallated transition metal catalyst which shows greater resistance to degradation caused by oxidation.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: February 24, 1987
    Assignee: General Electric Company
    Inventor: Larry N. Lewis
  • Heat curable silicone polyimide compositions
    Patent number: 4634610
    Abstract: Silicone polyimides can be used as a one or two package heat curable composition when cured by silicon vinyl silicon-hydride addition with a cyclometallized platinum phosphite catalyst.
    Type: Grant
    Filed: October 31, 1985
    Date of Patent: January 6, 1987
    Assignee: General Electric Company
    Inventors: Francis L. Keohan, Larry N. Lewis