Granted Patent
Utility
US 5,538,257 · App. 08/366,552
Spring device and method for holding a component on a shaft and pusher seal assembly using same
Inventor:
Jan E. Sandgren
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Dec 30, 1994
Inventor
Jan E. Sandgren
Assignee (at issue)
EG&G 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.