Patents Represented by Attorney James O. Okorafor

Find this attorney in the Justia Lawyer Directory

  • Blends of polyketones and acidic polymers stabilized with salts
    Patent number: 5049630
    Abstract: Thermoplastic polymer compositions of improved melt stability comprise a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, a partially zinc-neutralized acidic polymer containing moieties of an .alpha.-olefin and an .alpha., .beta.-ethylenically unsaturated carboxylic acid and metal salt wherein the metal is aluminum, magnesium or scandium.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: September 17, 1991
    Assignee: Shell Oil Company
    Inventor: Edgar J. Smutny
  • Modified dispersant V.I. improver
    Patent number: 5049294
    Abstract: Improved dispersant/VI improver luboil additives are produced by reacting a hydrogenated conjugated diene star polymer or block copolymer with an alpha, beta unsaturated carboxylic acid or derivative to form an activated star polymer, which is then reacted with a) an alkyl carboxylic acid and b) an alkylamine or alkane polyol, or with the preformed product of reactants a) and b).
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: September 17, 1991
    Assignee: Shell Oil Company
    Inventors: Arie Van Zon, Gerarda J. Klaver
  • Resin compositions
    Patent number: 5037944
    Abstract: Novel thermosetting resins are produced from low molecular weight linear alternating polymers of carbon monoxide and a suitable curing agent. The resin compositions are particularly useful as coatings.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: August 6, 1991
    Assignee: Shell Oil Company
    Inventors: Abraham A. Smaardijk, Arris H. Kramer
  • Oil compositions containing modified star polymers
    Patent number: 5035820
    Abstract: Lubricating oil compositions which contain hydrogenated diene star polymers grafted with N-vinylimidazole exhibit improved engine performance when prepared by grafting the polymer in an oil mixture containing at least 6% by weight of the star polymer. The grafting is accomplished by contacting the polymer with from about 3.0 to about 5.5 wt % N-vinylimidazole when N-vinylimidazole is the sole reactant and from about 1.0 to about 5.0 wt % N-vinylimidazole when N-vinylimidazole is used in combination with N-vinylpyrrolidone.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: July 30, 1991
    Assignee: Shell Oil Company
    Inventors: Robert B. Rhodes, Rudolf J. A. Eckert
  • Reinforced polymers
    Patent number: 5034431
    Abstract: Glass fiber reinforced linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon show good mechanical properties when the glass fiber employed for reinforcement contains a sizing with an aminosilane functional group, and a polymeric film former with polyurethane and epoxy functional groups, and is present in an amount of from about 1 to 45 weight percent of the reinforced fiber.
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: July 23, 1991
    Assignee: Shell Oil Company
    Inventor: Stephen J. Hanley
  • Flame retardant composition #3
    Patent number: 5030674
    Abstract: Flame retardant compositions comprise linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and a minor quantity, relative to the polymer, of a thermally stable cyclic phosphonate ester and polytetrafluoroethylene resin.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: July 9, 1991
    Assignee: Shell Oil Company
    Inventor: Vincent J. Notorgiacomo, Jr.
  • Stabilized polymer compositions of linear alternating polyketones and zinc aluminate
    Patent number: 5028652
    Abstract: Stabilized polymer compositions comprise a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon incorporating a stabilizing quantity of a zinc aluminate and, optionally, an acidic polymer containing moieties of an .alpha.-olefin and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid. The compositions demonstrate improved melt stability.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: July 2, 1991
    Assignee: Shell Oil Company
    Inventors: Edgar J. Smutny, Lynn H. Slaugh