Granted Patent
Utility
US 5,020,809 · App. 07/477,417
High-speed easy-maintenance split seal
Inventor:
John J. Mullaney
Patented Case
View Patent ↗
Granted: Jun 4, 1991
Filed: Feb 9, 1990
Inventor
John J. Mullaney
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.