Granted Patent
Utility
US 6,387,299 · App. 09/630,400
Process for producing electroluminescent phosphor with increased efficiency
Inventors:
Butchi Reddy Vaddi, Shellie K. Northrop
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Aug 2, 2000
Inventors
Butchi Reddy Vaddi
Shellie K. Northrop
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.