Granted Patent
Utility
US 6,004,908 · App. 09/200,939
Rapid gel formation in hydrocarbon recovery
Inventors:
Rhonda L. Graham, Leonard J. Persinski
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Nov 25, 1998
Inventors
Rhonda L. Graham
Leonard J. Persinski
Assignee (at issue)
ClearWater Holdings, Ltd.
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.