24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(21) Application No.0053/DEL/1999 A (22) Date of filing of Application: 12/01/1999
(54) Title of the invention: “A PROCESS FOR THE SYNTHESIS OF NEW GREEN EMITTING Tb 3+
ACTIVATED BORATE PHOSPHORS FOR USE IN LOW PRESSURE MERCURY
VAPOUR LAMPS.”
(51) International Classification 7 : C09K 11/63
(30) Priority Data:
(31) Document No.:09/26746
(32) Date: 05/03/1999
(33) Name of convention country: US
(66) Filed U/s 5(2): NIL
(61) Patent of addition to application No.: NA
(62) Filed on: NA
(63) Divisional to Application No.: NIL
(64) Filed on: NA
Total No Of Page: 12
(57) Abstract:
(71) Name of the applicant:
COUNCIL OF SCIENTIFIC AND
INDUSTRIAL RESEARCH.
Address of the Applicant:
Rafi Marg, New Delhi-110001
(72) Name of the Inventor:
GUNDLAPALLI VENKATA SUBBA
RAO
RAMAKRISHAN SANKAR.
A process for the synthesis of new green emitting Tb 3+ activated borate phosphors having the
formula A6M1-x TbM 1 (bo3) 6 wherein A=Sr; M=Y, Gd, Al, Ga; and 0.02