Granted Patent
Utility
US 5,261,676 · App. 07/803,007
Sealing arrangement with pressure responsive diaphragm means
Inventor:
Robert E. Rockwood
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Dec 4, 1991
Inventor
Robert E. Rockwood
Assignee (at issue)
Environamics 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.