Patents by Inventor John Thomas Leman

John Thomas Leman 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).

  • Patent number: 7316746
    Abstract: A method for a growing solid-state, spectrometer grade II-VI crystal using a high-pressure hydrothermal process including the following steps: positioning seed crystals in a growth zone of a reactor chamber; positioning crystal nutrient material in the nutrient zone of the chamber; filling the reactor with a solvent fluid; heating and pressuring the chamber until at least a portion of the nutrient material dissolves in the solvent and the solvent becomes supercritical in the nutrient zone; transporting supercritical from the nutrient zone to the growth zone, and growing the seed crystals as nutrients from the supercritical fluid deposit on the crystals.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: January 8, 2008
    Assignee: General Electric Company
    Inventors: Mark Philip D'Evelyn, Dong-Sil Park, John Thomas Leman
  • Patent number: 6797796
    Abstract: Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about −54° C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis[trimethoxysilyl(ethyl)]benzene have been found to be effective as cross-linkers.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: September 28, 2004
    Assignee: General Electric Company
    Inventors: Navjot Singh, John Thomas Leman, John M. Whitney, Herman Otto Krabbenhoft
  • Patent number: 6646090
    Abstract: Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about −54° C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis[trimethoxysilyl(ethyl)]benzene have been found to be effective as cross-linkers.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: November 11, 2003
    Assignee: General Electric Company
    Inventors: Navjot Singh, John Thomas Leman, John M. Whitney, Herman Otto Krabbenhoft
  • Publication number: 20030130466
    Abstract: Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about −54° C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis[trimethoxysilyl(ethyl)]benzene have been found to be effective as cross-linkers.
    Type: Application
    Filed: July 23, 2002
    Publication date: July 10, 2003
    Inventors: Navjot Singh, John Thomas Leman, John M. Whitney, Herman Otto Krabbenhoft
  • Patent number: 6562470
    Abstract: A method for making a coated substrate, a system, and articles made thereby are provided wherein the coated substrate comprises a coating composition and a substrate. The coating composition comprises an alkenyl functional compound and a hydride functional compound, and the substrate comprises a catalytically effective amount of a platinum group metal catalyst having the formula ZxPt(0)Ly wherein L comprises an electron-withdrawing ester ligand, a quinone-based ligand, or combination thereof, y is in a range between about 1 and about 4, Z comprises a coordinating ligand, and x is in a range between 0 and about 3 wherein x+y is in a range between about 2 and about 4.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: May 13, 2003
    Assignee: General Electric Company
    Inventors: John Thomas Leman, Judith Stein, Kathryn Ann Shaffer
  • Publication number: 20030009000
    Abstract: Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about −54° C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis[trimethoxysilyl(ethyl)]benzene have been found to be effective as cross-linkers.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 9, 2003
    Inventors: Navjot Singh, John Thomas Leman, John M. Whitney, Herman Otto Krabbenhoft
  • Publication number: 20030008999
    Abstract: A fluorosilicone crosslinker and method for making is provided. Reaction is effected between a silanol terminated polyfluoroalkyl silicone fluid and a polyalkoxysilane in the presence of a Platinum Group Metal catalyst. The fluorosilicone crosslinker can be used in combination with a silanol terminated fluoroalkyl substituted polydiorganosiloxane to formulate a neutral, condensation curable, solvent resistant sealant.
    Type: Application
    Filed: August 26, 2002
    Publication date: January 9, 2003
    Inventors: Navjot Singh, John Thomas Leman, John M. Whitney
  • Patent number: 6479610
    Abstract: A fluorosilicone crosslinker and method for making is provided. Reaction is effected between a silanol terminated polyfluoroalkyl silicone fluid and a polyalkoxysilane in the presence of a Platinum Group Metal catalyst. The fluorosilicone crosslinker can be used in combination with a silanol terminated fluoroalkyl substituted polydiorganosiloxane to formulate a neutral, condensation curable, solvent resistant sealant.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: November 12, 2002
    Assignee: General Electric Company
    Inventors: Navjot Singh, John Thomas Leman, John M. Whitney
  • Patent number: 6451954
    Abstract: Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about −54° C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis[trimethoxysilyl(ethyl)]benzene have been found to be effective as cross-linkers.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: September 17, 2002
    Assignee: General Electric Company
    Inventors: Navjot Singh, John Thomas Leman, John M. Whitney, Herman Otto Krabbenhoft
  • Publication number: 20020127412
    Abstract: A method for making a coated substrate, a system, and articles made thereby are provided wherein the coated substrate comprises a coating composition and a substrate. The coating composition comprises an alkenyl functional compound and a hydride functional compound, and the substrate comprises a catalytically effective amount of a platinum group metal catalyst having the formula ZxPt(0)Ly wherein L comprises an electron-withdrawing ester ligand, a quinone-based ligand, or combination thereof, y is in a range between about 1 and about 4, Z comprises a coordinating ligand, and x is in a range between 0 and about 3 wherein x+y is in a range between about 2 and about 4.
    Type: Application
    Filed: January 10, 2001
    Publication date: September 12, 2002
    Inventors: John Thomas Leman, Judith Stein, Kathryn Ann Shaffer