IP Library Granted Patent US 4,389,050
Granted Patent Utility
US 4,389,050 · App. 06/398,927

Mechanical seal having a seal insert mounted in a laminated shell

Inventors: Norman E. Johnson, Harold F. Greiner
Patented Case View Patent ↗
Granted: Jun 21, 1983 Filed: Jul 16, 1982
Inventors
Norman E. Johnson
Harold F. Greiner
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.

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Quick Facts
Patent No.
US 4,389,050
App. No.
06/398,927
Filed
1982-07-16
Granted
1983-06-21
Kind
A