Granted Patent
Utility
US 6,220,348 · App. 09/175,595
Retrievable bridge plug and retrieving tool
Inventors:
Vitold P. Serafin, Barry J. Tate, Piro Shkurti
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Oct 20, 1998
Inventors
Vitold P. Serafin
Barry J. Tate
Piro Shkurti
Assignee (at issue)
Polar Completions Engineering, 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.