Granted Patent
Utility
US 4,299,810 · App. 06/183,819
Process for separating selenium and telurium from each other
Inventor:
Gary N. Snow
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Sep 3, 1980
Inventor
Gary N. Snow
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.