Granted Patent
Utility
US 5,801,217 · App. 08/862,206
Chromium-free conversation coating and methods of use
Inventors:
Edward A. Rodzewich, Jiangbo Ouyang, Joseph E. Murphy
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: May 22, 1997
Inventors
Edward A. Rodzewich
Jiangbo Ouyang
Joseph E. Murphy
Assignee (at issue)
Betzdearborn, 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.