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. 29, 2003
Filed:
Sep. 01, 2001
Applicant:
Inventors:
Butchi Reddy Vaddi, Sayre, PA (US);
Shellie K. Northrop, Sayre, PA (US);
Assignee:
Osram Sylvania Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 1/154 ; C09K 1/156 ;
U.S. Cl.
CPC ...
C09K 1/154 ; C09K 1/156 ;
Abstract
A process for improving the half-life of ZnS:Cu,Cl electroluminescent phosphor wherein the improvement comprises firing a previously first fired material comprised of ZnS:Cu,Cl with a quantity of MgSO .7H O to form a second fired material. The quantity is from 0.015 to 0.15 mole of MgSO .7H O/mole of ZnS.