Granted Patent
Utility
US 5,846,915 · App. 08/548,646
Delayed breaking of gelled hydrocarbon fracturing fluid
Inventors:
Kevin W. Smith, Todd Thomas
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Oct 26, 1995
Inventors
Kevin W. Smith
Todd Thomas
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.