Granted Patent
Utility
US 4,808,335 · App. 07/115,330
Oxidation and corrosion resistant diesel engine lubricant
Inventors:
Rodney L. Sung, Benjamin H. Zoleski, Ronald L. O'Rourke
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Nov 2, 1987
Inventors
Rodney L. Sung
Benjamin H. Zoleski
Ronald L. O'Rourke
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.