Granted Patent
Utility
US 4,879,186 · App. 07/147,215
Photoluminescent materials for outputting reddish-orange light and a process for making the same
Inventor:
Joseph Lindmayer
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Jan 22, 1988
Inventor
Joseph Lindmayer
Assignee (at issue)
QUANEX 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.