Granted Patent
Utility
US 4,446,357 · App. 06/316,464
Resistance-heated boat for metal vaporization
Inventor:
Dennis Wayne Barshter
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Oct 30, 1981
Inventor
Dennis Wayne Barshter
Assignee (at issue)
Kennecott Holdings 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.