Granted Patent
Utility
US 4,403,778 · App. 06/382,492
Face seal assembly and method of use
Inventors:
Edward J. Shevokas, William S. Bathgate
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: May 27, 1982
Inventors
Edward J. Shevokas
William S. Bathgate
Assignee (at issue)
Sundstrand Corporation
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.