Granted Patent
Utility
US 5,447,660 · App. 08/162,830
Method for making a calcium halophosphate phosphor
Inventor:
Chung-Nin Chau
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Dec 6, 1993
Inventor
Chung-Nin Chau
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.