Granted Patent
Utility
US 3,938,692 · App. 05/510,483
Pressure-vacuum relief fuel tank cap with roll-over safety valve feature
Inventor:
Billy G. Crute
Patented Case
View Patent ↗
Granted: Feb 17, 1976
Filed: Sep 30, 1974
Inventor
Billy G. Crute
Assignee (at issue)
Stant Manufacturing 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.