Granted Patent
Utility
US 4,566,972 · App. 06/691,724
Treatment of aqueous systems
Inventors:
John J. Bennison, Stuart W. Longworth, John G. Baker
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Jan 15, 1985
Inventors
John J. Bennison
Stuart W. Longworth
John G. Baker
Assignee (at issue)
Dearborn Chemical Company Limited
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.