Granted Patent
Utility
US 4,997,193 · App. 07/525,592
Oil pan gasket and method of making same
Inventor:
Daniel E. Czernik
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: May 18, 1990
Inventor
Daniel E. Czernik
Assignee (at issue)
Fel-Pro Incorporated
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.