IP Library › Granted Patent US 4,844,154
Granted Patent Utility
US 4,844,154 · App. 07/210,232

Well packer

Inventors: Colby M. Ross, Pat M. White
Patented Case View Patent ↗
Granted: Jul 4, 1989 Filed: Jun 23, 1988
Inventors
Colby M. Ross
Pat M. White
Assignee (at issue)
Otis Engineering 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.

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 4,844,154
App. No.
07/210,232
Filed
1988-06-23
Granted
1989-07-04
Kind
A