Granted Patent
Utility
US 5,282,905 · App. 07/907,428
Method and composition for treatment of galvanized steel
Inventors:
David W. Reichgott, Fu Chen
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Jul 1, 1992
Inventors
David W. Reichgott
Fu Chen
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.