Patents by Inventor Robert E. Ernhoffer

Robert E. Ernhoffer 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).

  • Complex alkoxy borates of alkylated phenols as lubricant stabilizers
    Patent number: 5252237
    Abstract: Alkoxy borates of alkylated phenols have been found to be effective cleanliness agents for lubricants and additives for improving the dropping point of greases.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: October 12, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Harry J. Andress, Jr., Henry Ashjian, William F. Olszewski, Robert E. Ernhoffer
  • Thiadiazole-aryl sulfonate reaction products as multifunctional additives and compositions containing same
    Patent number: 5171861
    Abstract: Dimercaptothiadiazole reacted with arylsulfonic acids preformed or formed in situ in lubricants provide multifunctional antioxidant, antiwear, and corrosion inhibiting properties thereto.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: December 15, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Robert E. Ernhoffer, Arjun K. Goyal, Andrew G. Horodysky, Derek A. Law, Shi-Ming Wu
  • Mixed alkoxylated alcohol-hydroquinone/resorcinol borates-antioxidants
    Patent number: 4985157
    Abstract: Mixed alkoxylated alcohol-hydroquinone or alkoxylated alcohol-resorcinol borates are effective multifunctional antioxidants for lubricants.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: January 15, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Liehpao O. Farng, Andrew G. Horodysky, Robert E. Ernhoffer, John A. Keller, Jr.