Granted Patent
Utility
US 4,244,828 · App. 05/960,517
Lubricating oil composition
Inventors:
John W. Hodge, Harry Chafetz
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: Nov 13, 1978
Inventors
John W. Hodge
Harry Chafetz
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.