Patents by Inventor Thomas L. Zahalka

Thomas L. Zahalka 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).

  • Fuel compositions and additives therefor
    Patent number: 5514190
    Abstract: A highly effective fuel additive composition for control of intake valve deposits is described. It comprises (a) a gasoline-soluble Mannich reaction product of (i) a high molecular weight alkyl-substituted phenol, (ii) amine, and (iii) aldehyde; (b) a gasoline-soluble poly(oxyalkylene) carbamate; and (c) a gasoline-soluble poly(oxyalkylene) alcohol, glycol or polyol, or mono or diether thereof. Fuel compositions and methods of controlling engine deposits are also described.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: May 7, 1996
    Assignee: Ethyl Corporation
    Inventors: Lawrence J. Cunningham, Thomas L. Zahalka