Granted Patent
Utility
US 4,697,650 · App. 06/654,186
Method for estimating formation characteristics of the exposed bottomhole formation
Inventor:
John E. Fontenot
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Sep 24, 1984
Inventor
John E. Fontenot
Assignee (at issue)
NL 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.