Granted Patent
Utility
US 4,473,488 · App. 06/433,080
Process for reclaiming rare-earth metallic oxide and/or rare-earth metallic oxysulfide phosphors
Inventors:
Heinz Beckerle, Volker Gerstle, Gerhard Mauz
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Oct 6, 1982
Inventors
Heinz Beckerle
Volker Gerstle
Gerhard Mauz
Assignee (at issue)
International Standard Electric Corporation
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.