Granted Patent
Utility
US 4,303,535 · App. 06/149,223
Hydrocarbyl carbamidopropanamide, its method of preparation and lubricating oil composition containing same
Inventor:
Kechia J. Chou
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: May 12, 1980
Inventor
Kechia J. Chou
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.