Granted Patent
Utility
US 4,450,052 · App. 06/402,657
Zinc and nickel tolerant trivalent chromium plating baths
Inventors:
Warren H. McMullen, Hyman Chessin, Denise Siracusa
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Jul 28, 1982
Inventors
Warren H. McMullen
Hyman Chessin
Denise Siracusa
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.