Granted Patent
Utility
US 5,468,412 · App. 08/306,041
Low foaming aqueous cleaning and passivating treatment for metals
Inventor:
Edward A. Rodzewich
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: Sep 14, 1994
Inventor
Edward A. Rodzewich
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.