IP Library Granted Patent US 4,643,437
Granted Patent Utility
US 4,643,437 · App. 06/840,369

Mechanical seal with automatic gap convergence control

Inventors: Richard F. Salant, William E. Key, Peter Kay
Patented Case View Patent ↗
Granted: Feb 17, 1987 Filed: Mar 17, 1986
Inventors
Richard F. Salant
William E. Key
Peter Kay
Assignee (at issue)
Borg-Warner Industrial Products, 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,643,437
App. No.
06/840,369
Filed
1986-03-17
Granted
1987-02-17
Kind
A