Granted Patent
Utility
US 5,770,039 · App. 08/642,427
Method and apparatus for measuring and controlling active oxygen concentration in a bleach environment
Inventors:
Martin P. Rigney, Richard J. Mehus, Mark Toetschinger, John R. Spriggs
Patented Case
View Patent ↗
Granted: Jun 23, 1998
Filed: May 3, 1996
Inventors
Martin P. Rigney
Richard J. Mehus
Mark Toetschinger
John R. Spriggs
Assignee (at issue)
ECOLAB 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.