Granted Patent
Utility
US 4,575,136 · App. 06/579,269
Tank cap having air actuated latch
Inventor:
Russell D. Keller
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Feb 13, 1984
Inventor
Russell D. Keller
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.