Granted Patent
Utility
US 4,669,735 · App. 06/782,414
Fail safe high pressure shaft seal
Inventors:
Jack G. Sundberg, Andrew Gahura
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Oct 1, 1985
Inventors
Jack G. Sundberg
Andrew Gahura
Assignee (at issue)
Colt 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.