Patents by Inventor Kelvin T. Higa

Kelvin T. Higa 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).

  • Synthesis of unsymmetric allyl-(alkyl) tellurides
    Patent number: 5124481
    Abstract: The new unsymmetric allyl-(alkyl) telluride compound methyl allyl telluride and other unsymmetric allyl-(alkyl) telluride compounds are prepared by adding an alkyl Grignard to a tellurium/tetrahydrofuran slurry, then subsequent reaction with an alkyl halide. The unsymmetric allyl-(alkyl) telluride product is isolated by filtration followed by vacuum distillation.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: June 23, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kelvin T. Higa, Daniel C. Harris
  • Method of preparing monomeric organometallic compounds
    Patent number: 5089643
    Abstract: Preparation of the novel monomeric compounds of the formula (t-Bu).sub.2 t-Bu).sub.2, where M is Ga, Al, or In and E is As, P, Sb, or N, by reaction of (t-Bu).sub.2 MCl and LiE(t-Bu).sub.2. The resulting product (t-Bu).sub.2 ME(t-Bu).sub.2 can be pyrolyzed to form crystalline films of the metallic material, ME.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: February 18, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kelvin T. Higa
  • Method of monomeric organometallic compounds
    Patent number: 5075466
    Abstract: Preparation of the novel monomeric compounds of the formula (t-Bu).sub.2 t-Bu).sub.2, where M is Ga, Al, or In and E is As, P, Sb, or N, by reaction of (t-Bu).sub.2 MCl and LiE(t-Bu).sub.2. The resulting product (t-Bu).sub.2 ME(t-Bu).sub.2 can be pyrolyzed to form crystalline films of the metallic material, ME.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: December 24, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kelvin T. Higa
  • Synthesis of diorgano tellurides
    Patent number: 5075500
    Abstract: The new compound diallyl telluride and other diorgano telluride compounds are prepared from alkali metal tellurides obtained by an efficient reaction between an alkali metal and tellurium in a naphthalene/tetrahydrofuran solution. The alkali metal telluride then reacts with an organo halide to form the final product which is easily isolated by filtration followed by vacuum distillation.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: December 24, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kelvin T. Higa, Daniel C. Harris
  • Monomeric organometallic compounds and method of preparing same
    Patent number: 5068370
    Abstract: Preparation of the novel monomeric compounds of the formula (t-Bu).sub.2 ME(t-Bu).sub.2, where M is Ga, Al, or In and E is As, P, Sb, or N, by reaction of (t-Bu).sub.2 MCl and LiE(t-Bu).sub.2. The resulting product (t-Bu).sub.2 ME(t-Bu).sub.2 can be pyrolyzed to form crystalline films of the metallic material, ME.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: November 26, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kelvin T. Higa
  • Diallyl telluride
    Patent number: 5043476
    Abstract: The new compound diallyl telluride and other diorgano telluride compounds are prepared from alkali metal tellurides obtained by an efficient reaction between an alkali metal and tellurium in a naphthalene/tetrahydrofuran solution. The alkali metal telluride then reacts with an organo halide to form the final product which is easily isolated by filtration followed by vacuum distillation.
    Type: Grant
    Filed: June 26, 1987
    Date of Patent: August 27, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kelvin T. Higa, Daniel C. Harris
  • Methyl allyl telluride
    Patent number: 5043477
    Abstract: The new unsymmetric allyl-(alkyl) telluride compound methyl allyl telluride and other unsymmetric allyl-(alkyl) telluride compounds are prepared by adding an alkyl Grignard to a tellurium/tetrahydrofuran slurry, then subsequent reaction with an alkyl halide. The unsymmetric allyl-(alkyl) telluride product is isolated by filtration followed by vacuum distillation.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: August 27, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kelvin T. Higa, Daniel C. Harris
  • Diallyl telluride and synthesis of diorgano tellurides
    Patent number: 5035874
    Abstract: The new compound diallyl telluride and other diorgano telluride compounds are prepared from alkali metal tellurides obtained by an efficient reaction between an alkali metal and tellurium in a naphthalene/tetrahydrofuran solution. The alkali metal telluride then reacts with an organo halide to form the final product which is easily isolated by filtration followed by vacuum distillation.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: July 30, 1991
    Assignee: The United Staes of America as represented by the Secretary of the Navy
    Inventors: Kelvin T. Higa, Daniel C. Harris
  • Preparation of dineopentylcadmium
    Patent number: 4962216
    Abstract: Dineopentylcadmium is prepared from cadmium dihalide and neopentyl Grignard in tetrahydrofuran. The reaction product is isolated by addition of dioxane, filtration, removal of solvent via distillation, and purification by sublimation.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: October 9, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kelvin T. Higa, Daniel C. Harris
  • Preparation of ditertiarybutyltelluride
    Patent number: 4946994
    Abstract: Ditertiarybutyltelluride and other symmetric dialkyltellurides are prepared from tellurium tetrachloride and metal alkyls in tetrahydrofuran. The reaction product is isolated by filtration followed by vacuum distillation.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: August 7, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Kelvin T. Higa