Granted Patent
Utility
US 5,470,613 · App. 08/186,962
Composition and method of forming a black no-rinse conversion coating on metal surfaces
Inventor:
Edward A. Rodzewich
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Jan 27, 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.