Granted Patent
Utility
US 4,969,502 · App. 07/350,290
Method and apparatus for the casting of metals
Inventors:
Eric L. Mawer, Martin Vanderminnen, Robert D. H. Willans
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: May 11, 1989
Inventors
Eric L. Mawer
Martin Vanderminnen
Robert D. H. Willans
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.