Granted Patent
Utility
US 4,668,348 · App. 06/780,469
Method for forming adherent, bright, smooth and hard chromium electrodeposits on ferrous metal substrates from high energy efficient chromium baths
Inventors:
Allen R. Jones, Hyman Chessin
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Sep 26, 1985
Inventors
Allen R. Jones
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.