Granted Patent
Utility
US 6,652,728 · App. 09/786,242
Cyanide-free aqueous alkaline bath used for the galvanic application of zinc or zinc-alloy coatings
Inventors:
Birgit Sonntag, Udo Grieser, Barrie Sydney James
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Jun 25, 2001
Inventors
Birgit Sonntag
Udo Grieser
Barrie Sydney James
Assignee (at issue)
Atotech Deutschland GmbH
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.