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:
Feb. 10, 2015
Filed:
Sep. 06, 2012
Edward D. Kingsley, Stow, MA (US);
Satish Agrawal, Concord, MA (US);
Edward D. Kingsley, Stow, MA (US);
Satish Agrawal, Concord, MA (US);
Performance Indictor, LLC, Lowell, MA (US);
Abstract
A low rare earth mineral photoluminescent structure for generating long-persistent luminescence that utilizes at least a phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent, and one or more fluorescent layers is disclosed. Further disclosed are methods for fabricating and using the inventive low rare earth mineral photoluminescent structure. A low rare earth mineral photoluminescent composition for generating long-persistent luminescence that utilizes at least one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent and one or more fluorescent materials is also disclosed, as well as, the methods for fabricating and using the inventive low rare earth mineral photoluminescent composition.