Granted Patent
Utility
US 5,111,879 · App. 07/533,838
Sanitary locking lip split well seal
Inventors:
Terry H. Jozwiak, Eugene C. Hunley, Jr.
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Jun 6, 1990
Inventors
Terry H. Jozwiak
Eugene C. Hunley, Jr.
Assignee (at issue)
Amtrol, 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.