Patents by Inventor Rolf Sieverding

Rolf Sieverding 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).

  • ORI-inhibited motor fuel composition
    Patent number: 4968321
    Abstract: A motor fuel composition which inhibits engine ORI and intake valve deposit formation and sticking comprises a mixture of hydrocarbons boiling in the range of 90.degree. F.-450.degree. F. and (I) the reaction product of a hydrocarbyl-substituted dibasic acid anhydride and a polyoxyalkylene diamine; (II) a polymeric component which is a polyolefin polymer, copolymer, or the corresponding aminated or hydrogenated polymer or copolymer, or mixtures thereof, of a C.sub.2 -C.sub.10 hydrocarbon; (III) a polyalkylene glycol having a molecular weight in the range of 500-2000; and (IV) a lubricating oil composition.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: November 6, 1990
    Assignees: Texaco Inc., Texaco Technology Europe GmbH
    Inventors: Rodney L. Sung, Daniel T. Daly, Thomas E. Hayden, Rolf Sieverding