Granted Patent
Utility
US 5,851,038 · App. 08/770,661
Sealing ring
Inventors:
Darrell Robinson, Allen V. Pruehs
Patented Case
View Patent ↗
Granted: Dec 22, 1998
Filed: Dec 20, 1996
Inventors
Darrell Robinson
Allen V. Pruehs
Assignee (at issue)
Ekstrom Industries, 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.