Granted Patent
Utility
US 4,580,692 · App. 06/738,975
Container sealing cap
Inventors:
Robert L. La Barge, Robert E. Heffner
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: May 29, 1985
Inventors
Robert L. La Barge
Robert E. Heffner
Assignee (at issue)
Aluminum Company of America
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.