Granted Patent
Utility
US 5,007,481 · App. 07/473,863
Method of treating subterranean formations using a non-damaging fracturing fluid
Inventors:
Dennis A. Williams, Roger Horton, John C. Newlove, Robert E. Chumley
Patented Case
View Patent ↗
Granted: Apr 16, 1991
Filed: Feb 2, 1990
Inventors
Dennis A. Williams
Roger Horton
John C. Newlove
Robert E. Chumley
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.