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:
Apr. 27, 2010
Filed:
May. 17, 2007
Michael Karl Crawford, Glen Mills, PA (US);
Kurt Richard Mikeska, Hockessin, DE (US);
Michael Karl Crawford, Glen Mills, PA (US);
Kurt Richard Mikeska, Hockessin, DE (US);
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The invention is directed to a composition having a carrier matrix, and a particulate luminescent composition dispersed therein, the particulate luminescent composition comprising a rare-earth-doped alkaline earth fluoride represented by the formulaREAFOwherein RE represents a three-valent rare-earth element, A is alkaline earth, 0.002≦x≦0.20, and 0≦y≦x; the particulate luminescent composition exhibiting a luminescence spectrum having a plurality of intensity peaks at characteristic wavelengths. It is further directed to a process by contacting a surface with the composition and articles made therefrom.