Patents by Inventor Richard J. French

Richard J. French 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).

  • Inclusion of oxygen in the polymerization of olefins
    Patent number: 4540755
    Abstract: Process for the polymerization of olefins comprising contacting an olefin, admixed with an oxygen-containing gas, with a supported organophosphoryl-chromium oxide catalyst.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: September 10, 1985
    Assignee: National Petro Chemicals Corporation
    Inventors: Harry W. Mayhew, Richard J. French, Louis J. Rekers
  • Production of polyolefins having improved ESCR
    Patent number: 4356294
    Abstract: High density polyethylene resins of improved environmental stress crack resistance, (ESCR) for blow molding and related uses produced with chromium/aluminum based heat activated supported catalysts wherein the support is dried under controlled conditions to provide a selected silanol group population.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: October 26, 1982
    Assignee: National Petro Chemicals Corp.
    Inventors: Louis J. Rekers, Richard J. French, Harry W. Mayhew