Patents Examined by Maurice L. Welsh
  • 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
  • Water-soluble polyurethane comb polymer production
    Patent number: 4496708
    Abstract: Water soluble polyurethanes, having hydrophilic polyether backbone and pendant monovalent hydrophobic groups of sufficient size and number while establishing proper hydrophilic/lipophilic balance, provide improved thickening of aqueous systems.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: January 29, 1985
    Assignee: Union Carbide Corporation
    Inventors: David C. Dehm, Kenneth L. Hoy, Richard C. Hoy