Granted Patent
Utility
US 5,976,413 · App. 09/067,464
Method of preparing a lead and manganese co-activated calcium metasilicate phosphor
Inventors:
Anthony Diaz, Jenace A. Yurchisin
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Apr 28, 1998
Inventors
Anthony Diaz
Jenace A. Yurchisin
Assignee (at issue)
OSRAM SYLVANIA 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.