Granted Patent
Utility
US 4,611,663 · App. 06/719,383
Casing hanger and running apparatus
Inventors:
Gregg A. Goris, John Pettit
Patented Case
View Patent ↗
Granted: Sep 16, 1986
Filed: Apr 2, 1985
Inventors
Gregg A. Goris
John Pettit
Assignee (at issue)
Vetco Offshore Industries, 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.