Granted Patent
Utility
US 5,217,074 · App. 07/784,532
Method of fracturing formations
Inventors:
Lee A. McDougall, Fati Malekahmadi, Dennis A. Williams
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Oct 29, 1991
Inventors
Lee A. McDougall
Fati Malekahmadi
Dennis A. Williams
Assignee (at issue)
Exxon Chemical Patents, Inc.
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.