Granted Patent
Utility
US 4,285,823 · App. 06/109,701
Diesel lubricant containing 5-amino tetrazoles
Inventors:
Rodney L. Sung, Benjamin H. Zoleski
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Jan 4, 1980
Inventors
Rodney L. Sung
Benjamin H. Zoleski
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.