Granted Patent
Utility
US 4,487,258 · App. 06/523,376
Hydraulically set well packer
Inventors:
Alan Tancel Jackson, William David Henderson
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Aug 15, 1983
Inventors
Alan Tancel Jackson
William David Henderson
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.