Granted Patent
Utility
US 6,257,253 · App. 08/229,648
Percarboxylic acid rinse method
Inventors:
Steven E. Lentsch, Dale W. Groth, Thomas R. Oakes, Burton M. Baum
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Apr 19, 1994
Inventors
Steven E. Lentsch
Dale W. Groth
Thomas R. Oakes
Burton M. Baum
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.