Granted Patent
Utility
US 5,424,284 · App. 08/087,458
Drilling fluid additive and method for inhibiting hydration
Inventors:
Arvind D. Patel, Henry C. McLaurine
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Jul 2, 1993
Inventors
Arvind D. Patel
Henry C. McLaurine
Assignee (at issue)
M-I Drilling Fluids
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.