Granted Patent
Utility
US 5,729,013 · App. 08/740,875
Wellbore infrared detection device and method
Inventor:
Frank E. Bergren
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Nov 4, 1996
Inventor
Frank E. Bergren
Assignee (at issue)
Atlantic Richfield Company
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.