Granted Patent
Utility
US 5,693,290 · App. 08/638,632
Inhibition of corrosion in aqueous systems
Inventors:
Stephen M. Kessler, Roger C. May
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Apr 26, 1996
Inventors
Stephen M. Kessler
Roger C. May
Assignee (at issue)
Betzdearborn, 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.