Granted Patent
Utility
US 5,141,661 · App. 07/753,591
Wear resistant lubricant additives made of ethylene/.alpha.-olefin polymer grafted with perfluoro-substituents
Inventors:
Thomas F. DeRosa, Benjamin J. Kaufman, Rosemary J. Jennejahn, Joseph M. Russo
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Sep 3, 1991
Inventors
Thomas F. DeRosa
Benjamin J. Kaufman
Rosemary J. Jennejahn
Joseph M. Russo
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.