Granted Patent
Utility
US 5,451,779 · App. 08/167,672
Formation density measurement apparatus and method
Inventors:
Ronald L. Spross, Thomas Burnett
Patented Case
View Patent ↗
Granted: Sep 19, 1995
Filed: Dec 15, 1993
Inventors
Ronald L. Spross
Thomas Burnett
Assignee (at issue)
Baroid Limited
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.