Patents by Inventor Kenneth T. Collington

Kenneth T. Collington 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).

  • Blowing agent compositions
    Patent number: 4312776
    Abstract: A blowing agent composition comprises azodicarbonamide, 0.005 to 5% by weight, based on the weight of azodicarbonamide, of a chromium sulphate, and 0.005-1% by weight, based on the weight of azodicarbonamide, of at least one zinc compound selected from zinc salts and oxides.
    Type: Grant
    Filed: October 10, 1980
    Date of Patent: January 26, 1982
    Assignee: FBC Limited
    Inventors: Rishi R. Puri, Kenneth T. Collington
  • Blowing agent composition
    Patent number: 4183822
    Abstract: The present invention relates to a process for expanding thermoplastic polymer compositions, notably those containing polymers having processing temperatures in excess of 200.degree. C. and/or containing an ingredient which is susceptible to ammonia, characterized in that as the blowing agent certain carbonates (notably zinc carbonate) are used. Preferably a nucleating agent and a weak acid are present to aid cell formation.The invention also includes expandable polymer compositions and blowing agent formulations containing the carbonates.
    Type: Grant
    Filed: January 18, 1978
    Date of Patent: January 15, 1980
    Assignee: Fisons Limited
    Inventors: Kenneth T. Collington, Rishi R. Puri, Peter J. Gibson