Granted Patent
Utility
US 4,443,340 · App. 06/497,612
Control of iron induced fouling in water systems
Inventors:
Roger C. May, Frank C. Sessa
Patented Case
View Patent ↗
Granted: Apr 17, 1984
Filed: May 24, 1983
Inventors
Roger C. May
Frank C. Sessa
Assignee (at issue)
Betz Laboratories, 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.