Granted Patent
Utility
US 5,146,984 · App. 07/682,811
Emergency release device for connecting between tubular members in oil and gas wells
Inventor:
Charles W. Pleasants
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Apr 9, 1991
Inventor
Charles W. Pleasants
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.