Granted Patent
Utility
US 5,273,687 · App. 07/988,053
Microbiological control of recirculating water in evaporative cooling systems at idle conditions
Inventor:
William T. Osborne
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Dec 9, 1992
Inventor
William T. Osborne
Assignee (at issue)
Baltimore Aircoil Company, 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.