Granted Patent
Utility
US 5,167,845 · App. 07/631,531
Polymeric additives to enhance anti-wear, anti-oxidancy, and dispersancy in lubricants
Inventors:
Thomas F. DeRosa, Rodney L. Sung, Benjamin J. Kaufman, Rosemary J. Jennejahn
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Dec 21, 1990
Inventors
Thomas F. DeRosa
Rodney L. Sung
Benjamin J. Kaufman
Rosemary J. Jennejahn
Assignee (at issue)
Texaco Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.