Granted Patent
Utility
US 5,169,015 · App. 07/839,099
Vehicle radiator cap with auxiliary vacuum seal
Inventor:
Lawrence H. Burke
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Feb 20, 1992
Inventor
Lawrence H. Burke
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.