Patents by Inventor Corrie M. J. Leenaars

Corrie M. J. Leenaars 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).

  • Gasoline composition and method for reducing fuel consumption
    Patent number: 4389221
    Abstract: A gasoline motor fuel composition is disclosed comprising a minor and effective amount of at least one sulfurized dioleyl ester of norbornene. Also disclosed is a method for reducing fuel consumption of internal combustion engines by incorporating a sulfurized dioleyl ester of norbornene into the gasoline fuel to said engines and operating the engines for a time sufficient to disperse said ester throughout the oil-contacted surfaces of the engine.
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: June 21, 1983
    Assignee: Shell Oil Company
    Inventors: Leonard B. Graiff, Rudolf F. Heldeweg, Corrie M. J. Leenaars
  • Dithiophosphoric acids and salts thereof and oil compositions containing the salts
    Patent number: 4212751
    Abstract: Novel esters of dithiophosphoric acid and secondary alcohols having two beta quaternary carbon atoms, and salts of such esters suitable as additives in oil compositions are disclosed.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: July 15, 1980
    Assignee: Shell Oil Company
    Inventors: Hendrik Schadenberg, Corrie M. J. Leenaars, Aaldert J. de Jong