Granted Patent
Utility
US 5,226,662 · App. 07/909,613
Expanded graphite and metal core automotive head gasket
Inventor:
Thomas J. Justus
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jul 7, 1992
Inventor
Thomas J. Justus
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.