Granted Patent
Utility
US 5,085,696 · App. 07/735,481
Methods and compositions for treating metals by means of water-borne polymeric films
Inventors:
Frank Müller, Arnold E. Zaelke
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: Jul 25, 1991
Inventors
Frank Müller
Arnold E. Zaelke
Assignee (at issue)
Atochem North America, 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.