Granted Patent
Utility
US 4,404,262 · App. 06/289,586
Composite metallic and refractory article and method of manufacturing the article
Inventor:
Thomas Watmough
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Aug 3, 1981
Inventor
Thomas Watmough
Assignee (at issue)
International Harvester Company
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.