Patents by Inventor John P. R. Hogan

John P. R. Hogan 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).

  • Ethylene homopolymer and copolymer polymerization process and the products produced therefrom
    Patent number: 5155186
    Abstract: A process has been discovered for the polymerization of ethylene and mixtures of ethylene with at least one other mono-1-olefin by employing a polymerization catalyst that produces polymers containing terminal vinyl unsaturation wherein such catalyst is exposed to a modifying agent prior to or during the polymerization reaction.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: October 13, 1992
    Assignee: Phillips Petroleum Company
    Inventors: John P. R. Hogan, Charles R. Nease