Granted Patent
Utility
US 6,131,661 · App. 09/127,842
Method for removing filtercake
Inventors:
Richard Conner, Joseph R. Murphey
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Aug 3, 1998
Inventors
Richard Conner
Joseph R. Murphey
Assignee (at issue)
TETRA Technologies, 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.