Granted Patent
Utility
US 5,710,108 · App. 08/628,368
Biopolymer/oil suspension compositions utilized in aqueous-based fluids used in the oil service industry including completion and drilling fluids
Inventors:
Keith R. McNally, James Gambino, Charles A. Cody, Wilbur Mardis
Patented Case
View Patent ↗
Granted: Jan 20, 1998
Filed: Apr 5, 1996
Inventors
Keith R. McNally
James Gambino
Charles A. Cody
Wilbur Mardis
Assignee (at issue)
Rheox 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.