Granted Patent
Utility
US 6,216,786 · App. 09/092,886
Method for forming a fracture in a viscous oil, subterranean formation
Inventors:
Lawrence Gene Griffin, Carl T. Montgomery
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Jun 8, 1998
Inventors
Lawrence Gene Griffin
Carl T. Montgomery
Assignee (at issue)
Atlantic Richfield Company
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.