Granted Patent
Utility
US 5,866,013 · App. 08/909,802
Method for inhibiting scale and controlling corrosion in cooling water systems
Inventors:
Stephen M. Kessler, Donald T. Freese
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Aug 12, 1997
Inventors
Stephen M. Kessler
Donald T. Freese
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.