Patents by Inventor James O. Tveekrem

James O. Tveekrem 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).

  • Bituminous compositions
    Patent number: 4973615
    Abstract: A bituminous composition comprising a blend of bitumen, a polyolefin and a thermoplastic elastomer containing at least two polymer blocks wherein one of said polymer blocks is a crystalline polymer block and one of said polymer blocks is an amorphous polymer block is provided.The bituminous compositions of the invention have excellent low temperature flexibility and high temperature creep resistance properties and are particularly useful as a roof coating or waterproofing material or a road paving material.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: November 27, 1990
    Assignee: Bridgestone/Firestone, Inc.
    Inventors: Shingo Futamura, James O. Tveekrem
  • Radiation crosslinked polyvinyl chloride and process therefor
    Patent number: 3998715
    Abstract: Radiation crosslinked polyvinyl chloride compositions employing ethoxylated bis phenol-A dimethacrylate and similar compounds as crosslinking monomers.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: December 21, 1976
    Assignee: The Firestone Tire & Rubber Company
    Inventors: Georg G. A. Bohm, Dale S. Pearson, James O. Tveekrem