Granted Patent
Utility
US 5,692,757 · App. 08/277,549
Bidirectional shaft seal with intersecting spiral grooves
Inventor:
Carole L. Straub
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Jul 19, 1994
Inventor
Carole L. Straub
Assignee (at issue)
Mather Seal Company
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.