Granted Patent
Utility
US 4,392,376 · App. 06/249,622
Method and apparatus for monitoring borehole conditions
Inventors:
Peter L. Lagus, Edward W. Peterson, William O. Hicks
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Mar 31, 1981
Inventors
Peter L. Lagus
Edward W. Peterson
William O. Hicks
Assignee (at issue)
S-Cubed
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.