Granted Patent
Utility
US 5,871,691 · App. 08/534,364
Inhibition of corrosion in aqueous systems
Inventors:
William S. Carey, William C. Ehrhardt, Andrew Solov
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Sep 27, 1995
Inventors
William S. Carey
William C. Ehrhardt
Andrew Solov
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.