Granted Patent
Utility
US 4,966,233 · App. 07/409,178
Tracer deployment tools
Inventors:
Curtis G. Blount, Frank E. Bergren
Patented Case
View Patent ↗
Granted: Oct 30, 1990
Filed: Sep 19, 1989
Inventors
Curtis G. Blount
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.