Granted Patent
Utility
US 5,203,409 · App. 07/826,087
Geothermal well apparatus and eccentric hanger spool therefor
Inventors:
G. Ray Seid, Joe Wilson, John B. Williams, Jr.
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Jan 27, 1992
Inventors
G. Ray Seid
Joe Wilson
John B. Williams, Jr.
Assignee (at issue)
Cooper Industries Holdings
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.