Granted Patent
Utility
US 4,594,170 · App. 06/624,423
Method for liquifying chloride-based heavy brine well completion fluids
Inventors:
Richard A. Brown, Robert D. Norris, Joseph C. Richards
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Jun 25, 1984
Inventors
Richard A. Brown
Robert D. Norris
Joseph C. Richards
Assignee (at issue)
FMC CORPORATION
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.