Patents by Inventor Theodore R. Walton

Theodore R. Walton 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).

  • Metal phthalocyanines as catalysts for curing phthalonitrile prepolymers
    Patent number: 5051493
    Abstract: Bis-phthalonitrile resins are cured using ionic metal phthalocyanine acceators. The ionic metal phthalocyanines are nontoxic and accelerate the cure rate of the resins without adversely affecting cured polymer strength. Di-Na, di-Li, Mg and Cd phthalocyanines in particular provide excellent cure acceleration. Also, the metal phthalocyanine can be made soluble in the resin by appropriate substitution of the aromatic rings, thus providing for homogenous polymerization.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: September 24, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Theodore R. Walton
  • Acetylene-terminated dianil monomer and the polymer therefrom
    Patent number: 4336362
    Abstract: A compound with the formula: ##STR1## wherein R is selected from the class consisting of H--, F--, Cl--, CH.su-n F.sub.n, and CH.sub.3-n Cl.sub.n and n is an integer from 1 to 3 and the polymer resulting therefrom by heating at a temperature from about the melting point to about 300.degree. C. The polymer is suitable as a high-temperature structural material and a semiconductor material.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: June 22, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Theodore R. Walton
  • Acetylene-terminated dianil monomer and the polymer therefrom
    Patent number: 4283557
    Abstract: A compound with the formula: ##STR1## wherein R is selected from the class consisting of H--, F--, Cl--, CH.su-n F.sub.n, and CH.sub.3-n Cl.sub.n and n is an integer from 1 to 3 and the polymer resulting therefrom by heating at a temperature from about the melting point to about 300.degree. C. The polymer is suitable as a high-temperature structural material and a semiconductor material.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: August 11, 1981
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Theodore R. Walton