Granted Patent
Utility
US 5,916,849 · App. 09/121,712
Polysaccharide-containing well drilling and servicing fluids
Inventor:
Roy F. House
Patented Case
View Patent ↗
Granted: Jun 29, 1999
Filed: Jul 24, 1998
Inventor
Roy F. House
Assignee (at issue)
VentureMD Innovations, LLC
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.