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:
Jul. 18, 2000
Filed:
Dec. 01, 1998
Applicant:
Inventors:
Nathaniel E Brese, Lansdale, PA (US);
Vaddi Butchi Reddy, Sayre, PA (US);
Assignee:
Osram Sylvania Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C09K / ;
U.S. Cl.
CPC ...
25230165 ; 2523 / ; 2523 / ;
Abstract
An electroluminescent phosphor containing an alkali iodide dopant, such as lithium iodide or potassium iodide, and having CIE coordinates of x=0.173 to 0.187 and y=0.392 to <0.424. The phosphor without alkali iodide dopant has CIE coordinates of x.apprxeq.0.180 to 0.184 and y.apprxeq.0.424 to 0.426. The method of making the phosphor includes adding the alkali iodides during a second firing step.