The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2005
Filed:
Nov. 19, 2003
Robert W. Hyland, Jr., Oakmont, PA (US);
James P. Quintenz, Henderson, KY (US);
Brian Tyler Dunville, Sebree, KY (US);
Gowri Subrahmanyam, Kingston, CA;
Robert W. Hyland, Jr., Oakmont, PA (US);
James P. Quintenz, Henderson, KY (US);
Brian Tyler Dunville, Sebree, KY (US);
Gowri Subrahmanyam, Kingston, CA;
KB Alloys, Robards, KY (US);
Abstract
A photoluminescent phosphorescent material for emergency lighting and the like. An alkaline earth aluminate base material is alloyed with a lanthamide earth element and a transition metal element. When exposed to ambient lighting, the material of the present invention emits light in dark areas even after the loss of electrical power. The addition of a transition metal element such as Scandium (Sc) provides longer and brighter photoluminescence than is expected by the use of a lanthanide element alone.