Granted Patent
Utility
US 6,405,796 · App. 09/699,862
Method for improving oil recovery using an ultrasound technique
Inventors:
Robert J. Meyer, Christine J. Tarnawskyj
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Oct 30, 2000
Inventors
Robert J. Meyer
Christine J. Tarnawskyj
Assignee (at issue)
Xerox Corporation
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.