Granted Patent
Utility
US 5,857,955 · App. 08/622,417
Centrifuge control system
Inventors:
Victor Phillips, Che-Liang Chang, Troy Martin
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Mar 27, 1996
Inventors
Victor Phillips
Che-Liang Chang
Troy Martin
Assignee (at issue)
M-I Drilling Fluids L.L.C.
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.