Granted Patent
Utility
US 6,502,637 · App. 09/812,422
Treating shale and clay in hydrocarbon producing formations
Inventor:
Kevin W. Smith
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Mar 20, 2001
Inventor
Kevin W. Smith
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.