Granted Patent
Utility
US 4,472,249 · App. 06/295,430
Bright chromium plating baths and process
Inventor:
Hyman Chessin
Patented Case
View Patent ↗
Granted: Sep 18, 1984
Filed: Aug 24, 1981
Inventor
Hyman Chessin
Assignee (at issue)
M&T Chemicals, 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.