Granted Patent
Utility
US 5,954,341 · App. 08/895,501
Bellows seal with drive collar for reverse pressure capability
Inventors:
Yoram Ringer, Fred Rathburn
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Jul 16, 1997
Inventors
Yoram Ringer
Fred Rathburn
Assignee (at issue)
John Crane Sealol 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.