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. 20, 2012
Filed:
Feb. 23, 2010
Digamber Gurudas Porob, Bangalore, IN;
Alok Mani Srivastava, Niskayuna, NY (US);
Prasanth Kumar Nammalwar, Bangalore, IN;
Gopi Chandran Ramachandran, Bangalore, IN;
Holly Ann Comanzo, Niskayuna, NY (US);
Digamber Gurudas Porob, Bangalore, IN;
Alok Mani Srivastava, Niskayuna, NY (US);
Prasanth Kumar Nammalwar, Bangalore, IN;
Gopi Chandran Ramachandran, Bangalore, IN;
Holly Ann Comanzo, Niskayuna, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
A method of recovering a rare earth constituent from a phosphor is presented. The method can include a number of steps (a) to (d). In step (a), the phosphor is fired with an alkali material under conditions sufficient to decompose the phosphor into a mixture of oxides. A residue containing rare earth oxides is extracted from the mixture in step (b). In step (c), the residue is treated to obtain a solution, which comprises rare earth constituents in salt form. Rare earth constituents are separated from the solution in step (d).