Granted Patent
Utility
US 5,018,577 · App. 07/561,854
Phosphinate inhibitor for scale squeeze applications
Inventors:
Jerry E. Pardue, James F. Kneller
Patented Case
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Granted: May 28, 1991
Filed: Aug 2, 1990
Inventors
Jerry E. Pardue
James F. Kneller
Assignee (at issue)
Nalco Chemical 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.