Granted Patent
Utility
US 4,717,540 · App. 06/904,536
Method and apparatus for dissolving nickel in molten zinc
Inventors:
Dale L. McRae, Robert D. H. Willans, Eric L. Mawer
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Sep 8, 1986
Inventors
Dale L. McRae
Robert D. H. Willans
Eric L. Mawer
Assignee (at issue)
Cominco, Ltd.
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.