Granted Patent
Utility
US 5,183,173 · App. 07/737,220
Auto venting fuel cap
Inventor:
Greg A. Heckman
Patented Case
View Patent ↗
Granted: Feb 2, 1993
Filed: Jul 29, 1991
Inventor
Greg A. Heckman
Assignee (at issue)
Epicor Industries, 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.