Granted Patent
Utility
US 3,953,339 · App. 05/397,299
Coning oil
Inventors:
James E. Obetz, Albert R. Tarini
Patented Case
View Patent ↗
Granted: Apr 27, 1976
Filed: Sep 14, 1973
Inventors
James E. Obetz
Albert R. Tarini
Assignee (at issue)
Diamond Shamrock Corporation
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.