IP Library › Granted Patent US 4,241,927
Granted Patent Utility
US 4,241,927 · App. 06/066,102

Mechanical seal

Inventor: Winfred J. Wiese
Patented Case View Patent ↗
Granted: Dec 30, 1980 Filed: Aug 13, 1979
Inventor
Winfred J. Wiese
Assignee (at issue)
BorgWarner 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 4,241,927
App. No.
06/066,102
Filed
1979-08-13
Granted
1980-12-30
Kind
A