Granted Patent
Utility
US 6,465,397 · App. 09/502,637
Synthetic crosslinked copolymer solutions and direct injection to subterranean oil and gas formations
Inventor:
Daniel Patterson
Patented Case
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Granted: Oct 15, 2002
Filed: Feb 11, 2000
Inventor
Daniel Patterson
Assignee (at issue)
Clariant Finance (BVI) Limited
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.