Patents Represented by Attorney C. D. Holland

Find this attorney in the Justia Lawyer Directory

  • Dimeric and tetrameric cyclopentadienyl group 6b metal alpha-olefin polymerization catalysts and process for polymerizing alpha-olefins
    Patent number: 5302674
    Abstract: Disclosed is a catalyst system for the homopolymerization and copolymerization of alpha-olefins having 2-8 carbon atoms, said catalyst system comprising a dimeric or tetrameric cyclopentadienyl Group 6b metal compound in which the metal has an oxidation state of +2, said Group 6b metal compound being supported on an inorganic support. The catalyst system may also contain a Group 2 or Group 3 metal alkyl compound cocatalyst.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: April 12, 1994
    Assignee: Chevron Research and Technology Company
    Inventors: Michael J. Carney, David L. Beach
  • Substantially non-crosslinked maleic anhydride-modified ethylene polymers and process for preparing same
    Patent number: 5300574
    Abstract: Disclosed are substantially non-crosslinked anhydride-modified, saturated ethylene polymers and a process for making them which comprises mixing together in the absence of solvent:(a) maleic anhydride;(b) a free radical initiator;(c) a saturated ethylene polymer; and(d) a polyamideat a temperature at which the saturated ethylene polymer and polyamide undergo deformation and are converted to a molten or fluid state.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: April 5, 1994
    Assignee: Chevron Research and Technology Company
    Inventor: Robert Bacskai