Granted Patent
Utility
US 4,748,849 · App. 07/010,684
Apparatus for dynamically measuring fluid loss characteristics
Inventors:
Dale E. Jamison, James V. Fisk, Jr.
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Feb 4, 1987
Inventors
Dale E. Jamison
James V. Fisk, Jr.
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.