Granted Patent
Utility
US 5,143,384 · App. 07/337,828
Bi-directional, non-contact face seal
Inventor:
Abraham Lipschitz
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Apr 14, 1989
Inventor
Abraham Lipschitz
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.