Granted Patent
Utility
US 6,015,015 · App. 08/564,357
Insulated and/or concentric coiled tubing
Inventors:
H. Bernie Luft, Graham Wilde, Peter J. Pelensky
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Jan 27, 1997
Inventors
H. Bernie Luft
Graham Wilde
Peter J. Pelensky
Assignees (at issue)
BJ Services Company, U.S.A.
Nowsco Well Service Ltd.
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.