Granted Patent
Utility
US 5,908,814 · App. 08/498,301
Drilling fluid additive and method for inhibiting hydration
Inventors:
Arvind D. Patel, Carl Thaemlitz, Henry C. McLaurine, Emanuel Stamatakis
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Jul 3, 1995
Inventors
Arvind D. Patel
Carl Thaemlitz
Henry C. McLaurine
Emanuel Stamatakis
Assignee (at issue)
M-I 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.