Patents by Inventor Norman Tunkel

Norman Tunkel 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).

  • Lubricating oil composition
    Patent number: 4502970
    Abstract: There is disclosed an improved lubricating oil composition useful in both gasoline and diesel engines which contains polyisobutenyl succinic anhydride as a supplemental dispersant-detergent in combination with a conventional lubricating oil dispersant.
    Type: Grant
    Filed: May 12, 1983
    Date of Patent: March 5, 1985
    Assignee: Exxon Research & Engineering Co.
    Inventors: Alan A. Schetelich, Norman Tunkel, Darrell W. Brownawell
  • Copolymers of ethylene and ethylenically unsaturated monomers, process for their preparation and distillate oil containing said copolymers
    Patent number: 4087255
    Abstract: Polymers of 1,000 to 50,000 and preferably of 1,000 to 2,900 number average molecular weight, comprising 3 to 40 molar proportions of ethylene per molar proportion of an ethylenically unsaturated monomer, are prepared by free radical catalysis in a solvent at temperatures of less than 130.degree. C. in order to minimize ethylene branching, for use as wax crystal modifying agents, e.g. pour depressants and flow improvers for distillate mineral oil, e.g. middle distillate fuel oil.
    Type: Grant
    Filed: January 14, 1974
    Date of Patent: May 2, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventors: Max J. Wisotsky, Norman Tunkel
  • Process for preparing copolymers of ethylene and vinyl esters or mixtures with other ethylenically unsaturated monomers
    Patent number: 3981850
    Abstract: Polymers of 1,000 to 50,000 and preferably of 1,000 to 2,900 number average molecular weight, comprising 3 to 40 molar proportions of ethylene per molar proportion of an ethylenically unsaturated monomer, are prepared by free radical catalysts in a solvent at temperatures of less than 130.degree.C. in order to minimize ethylene branching, for use as wax crystal modifying agents, e.g. pour depressants and flow improvers for distillate mineral oil, e.g. middle distillate fuel oil.
    Type: Grant
    Filed: August 19, 1975
    Date of Patent: September 21, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: Max J. Wisotsky, Norman Tunkel