Patents by Inventor Darlene G. Smith

Darlene G. Smith 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).

  • Flame retardant composition containing zinc borate
    Patent number: 4921897
    Abstract: Flame retardant compositions comprise linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a minor quantity, relative to the polymer, of a zinc borate or barium borate.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: May 1, 1990
    Assignee: Shell Oil Company
    Inventors: Richard L. Danforth, Darlene G. Smith
  • Polyketone flame retardant composition
    Patent number: 4885318
    Abstract: Flame retardant compositions comprise linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a minor quantity, relative to the polymer, of certain flame retardants containing an organo halide.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: December 5, 1989
    Assignee: Shell Oil Company
    Inventors: Richard L. Danforth, Darlene G. Smith
  • Flame retardant compositions
    Patent number: 4885328
    Abstract: Flame retardant compositions comprise linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a minor quantity, relative to the polymer of an alkaline earth metal hydroxide.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: December 5, 1989
    Assignee: Shell Oil Company
    Inventors: Richard L. Danforth, Darlene G. Smith