Patents by Inventor William D. Kray

William D. Kray 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).

  • Purification of silicon halides
    Patent number: 4755370
    Abstract: A method for the selective removal of boron halides and other Lewis acid-type impurities from silicon halides is disclosed. Treatment of contaminated silicon halides with siloxanes, which react with the impurities, allow the distillation of silicon halide which is virtually free from contamination within extremely low limits of detectability.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: July 5, 1988
    Assignee: General Electric Company
    Inventors: William D. Kray, John S. Razzano
  • Photopatternable polyimide compositions and method for making
    Patent number: 4578328
    Abstract: There is provided an article of manufacture prepared by(A) applying a coating of a solution containing a polymer having at least one pendant aromatic group and a bis-maleimide to a substrate;(B) allowing the coated substrate to dry;(C) exposing the coated substrate to a source of light for a time sufficient to effect crosslinking of said polymer having at least one pendant organic group and said bis-maleimide; and(D) developing the exposed substrate.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: March 25, 1986
    Assignee: General Electric Company
    Inventor: William D. Kray
  • Detection of boron impurities in chlorosilanes
    Patent number: 4529707
    Abstract: A method for preparing a chlorosilane sample to enable colorimetric detection of the presence of minute amounts of boron impurities is provided. Detection of boron impurities below five parts per billion is contemplated.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: July 16, 1985
    Assignee: General Electric Company
    Inventors: Harold R. Cowles, William D. Kray
  • Purification of chlorosilanes
    Patent number: 4481178
    Abstract: A method for the selective removal of phosphorus and other Lewis base-type impurities from chlorosilane solutions with selected transition metal compounds which react with the impurities and allow subsequent distillation of chlorosilane which is virtually free from contamination within extremely low limits of detectability.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: November 6, 1984
    Assignee: General Electric Company
    Inventor: William D. Kray
  • Article comprising silicone resin coated, methacrylate-primed substrate
    Patent number: 4395463
    Abstract: Improved air-drying primer compositions for solid substrates adapted for top coating with curable colloidal silica filled thermoset silicone resins comprise an acrylic ester dissolved in a mixture of 2-ethoxyethanol and 4-hydroxy-4-methyl-2-pentanone. In comparison with prior art primer compositions, there is no need for heat and/or ultraviolet curing of the present compositions.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: July 26, 1983
    Assignee: General Electric Company
    Inventor: William D. Kray
  • Silane-functionalized ultraviolet screen precursors
    Patent number: 4372835
    Abstract: Silane-functionalized ultraviolet screening agent precursors comprise compounds of the formula: ##STR1## wherein R is ##STR2## R.sup.1 is C.sub.1 -C.sub.6 alkyl, R.sup.2 is C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkanoyl, R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkoxyl, X is 0,1 or 2, y is 1,2, or 3 and x+y=3. Under ultraviolet radiation the compounds rearrange to the corresponding .alpha.-hydroxybenzophenones which protect substrates, especially transparent plastics, against degradation.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: February 8, 1983
    Assignee: General Electric Co.
    Inventors: Rack H. Chung, William D. Kray
  • Silane-functionalized ultraviolet screen precursors
    Patent number: 4328346
    Abstract: Silane-functionalized ultraviolet screening agent precursors comprise compounds of the formula: ##STR1## wherein R is ##STR2## R.sup.1 is C.sub.1 -C.sub.6 alkyl, R.sup.2 is C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkanoyl, R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkoxyl, X is 0,1 or 2, y is 1,2, or 3 and x+y=3. Under ultraviolet radiation the compounds rearrange to the corresponding .alpha.-hydroxybenzophenones which protect substrates, especially transparent plastics, against degradation.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: May 4, 1982
    Assignee: General Electric Company
    Inventors: Rack H. Chung, William D. Kray
  • 1,1,1-Triaryl-2,2,2-trifluoroethanes and process for their synthesis
    Patent number: 4307024
    Abstract: New 1,1,1-triaryl-2,2,2-trifluoroethanes in which the aryl radicals carry one or more substitutents have been prepared by condensation of trifluoroacetophenones with substituted phenyl compounds in the presence of catalytic quantities of trifluoromethylsulfonic acid. The reaction can be carried out under reflux in toluene or, for strikingly better results in certain cases, reactants are simply stirred at room temperature for about 24 to 48 hours.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: December 22, 1981
    Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, William D. Kray, Robert W. Rosser
  • Aqueous silicone resin coating composition and solid substrate coated therewith
    Patent number: 4298655
    Abstract: An improved silicone resin coating composition is provided, the composition comprising a dispersion of colloidal silica in an aliphatic alcohol-water solution of the partial condensate of a silanol with a small stabilizing amount of a .beta.-dicarbonyl compound added thereto.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: November 3, 1981
    Assignee: General Electric Company
    Inventor: William D. Kray