Granted Patent
Utility
US 4,736,863 · App. 06/868,551
Ball-valve fuel cap
Inventor:
Robert S. Harris
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: May 30, 1986
Inventor
Robert S. Harris
Assignee (at issue)
Stant 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.