Granted Patent
Utility
US 4,982,889 · App. 07/391,166
Floating dual direction seal assembly
Inventor:
Edward P. Eardley
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Aug 9, 1989
Inventor
Edward P. Eardley
Assignee (at issue)
Union Carbide 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.