Granted Patent
Utility
US 4,965,046 · App. 07/333,894
Creep resistant zinc-aluminum based casting alloy
Inventor:
Robert J. Barnhurst
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Apr 6, 1989
Inventor
Robert J. Barnhurst
Assignee (at issue)
Noranda 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.