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:
Mar. 21, 2006
Filed:
Sep. 20, 2003
Applicants:
Madis Raukas, Charlestown, MA (US);
Kailash C. Mishra, Chelmsford, MA (US);
Robert T. Mcsweeney, Sayre, PA (US);
Inventors:
Madis Raukas, Charlestown, MA (US);
Kailash C. Mishra, Chelmsford, MA (US);
Robert T. McSweeney, Sayre, PA (US);
Assignee:
Osram Sylvania Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/64 (2006.01);
U.S. Cl.
CPC ...
Abstract
A europium-activated barium aluminate phosphor is described wherein the phosphor is doped with tetravalent ions of Hf, Zr, or Si. Preferably, the phosphor is represented by (BaEu)MgAlO:(Hf,Zr,Si)where 0.05≦x≦0.25 and 0<y≦0.05. The tetravalent dopant ions are shown to enhance the stability of the phosphor in UV/VUV applications.