Granted Patent
Utility
US 4,887,733 · App. 07/256,182
Pressure-release fuel cap
Inventor:
Robert S. Harris
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Oct 11, 1988
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.