Granted Patent
Utility
US 4,698,501 · App. 06/734,963
System for simultaneous gamma-gamma formation density logging while drilling
Inventor:
William C. Paske
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: May 16, 1985
Inventor
William C. Paske
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.