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:
Dec. 18, 2007
Filed:
Apr. 25, 2005
Applicants:
Chen-wen Fan, Sayre, PA (US);
Thomas M. Snyder, Laceyville, PA (US);
Eric A. Thomason, Towanda, PA (US);
Inventors:
Chen-Wen Fan, Sayre, PA (US);
Thomas M. Snyder, Laceyville, PA (US);
Eric A. Thomason, Towanda, PA (US);
Assignee:
Osram Sylvania Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/63 (2006.01);
U.S. Cl.
CPC ...
Abstract
A UV-emitting phosphor comprising SrBO:Eu phosphor particles that have been treated to yield a surface layer containing from greater than 0 to about 25 atomic percent aluminum. The holdover stability of the treated SrBO:Eu phosphor improves the 100-hour maintenance in a fluorescent tanning lamp to the extent that the treated phosphor may be subject to a holdover period of more than 25 days without a significant change in its 100-hour maintenance.