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:
Aug. 14, 2007
Filed:
Dec. 28, 2004
Robert T. Mcsweeney, Sayre, PA (US);
Thomas M. Snyder, Laceyville, PA (US);
Eric R. Mercer, Sayre, PA (US);
Robert T. McSweeney, Sayre, PA (US);
Thomas M. Snyder, Laceyville, PA (US);
Eric R. Mercer, Sayre, PA (US);
Osram Sylvania Inc., Danvers, MA (US);
Abstract
A method of making a haloapatite phosphor having a general formula represented by (CaMnSb)(PO)(FClO), where 0<x<0.05, 0.004<y<0.01, and 0<z<0.1. is provided. The method involves (a) formulating a blend of ingredients to make the haloapatite phosphor, the ingredients including CaHPOas a primary source of calcium and phosphorus, (b) partially substituting an amount of an equimolar combination of an ammonium phosphate compound and calcium carbonate for an equal number of moles of CaHPOin the formulation, (c) combining the ingredients in their formulated amounts to form the blend, and (d) firing the blend to form the haloapatite phosphor. The partial substitution has been found to increase the 100-hour brightness of the haloapatite phosphors.