continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6813/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :07/08/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "METHODS FOR STORING HOLOGRAPHIC DATA AND ARTICLES HAVING ENHANCED
DATA STORAGE LIFETIME DERIVED THEREFROM"
(51) International classification :G11B 7/246 (71)Name of Applicant :
(31) Priority Document No :11/359,958
1)GENERAL ELECTRIC COMPANY
(32) Priority Date :22/02/2006
Address of Applicant :1 RIVER ROAD, SCHENECTADY,
(33) Name of priority country :U.S.A.
NY 12345 U.S.A. U.S.A.
(86) International Application No :PCT/US2007/001429 (72)Name of Inventor :
Filing Date
:18/01/2007
1)ERBEN CHRISTOPH GEORG
(87) International Publication No :WO 2007/097847 2)BODEN EUGENE PAULING
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
3)SHI XIAOLEI
4)LONGLEY KATHRYN LYNN
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
The present invention provides a method for storing holographic data comprising providing an optically transparent substrate
comprising a photochemically active dye; irradiating the optically transparent substrate with a holographic interference pattern,
wherein the pattern has a first wavelength and an intensity both sufficient to convert, within a volume element of the substrate, at least
some of the photochemically active dye into a photo-product, producing within the irradiated volume element concentration variations
of the photo-product corresponding to the holographic interference pattern, thereby producing a first optically readable datum
corresponding to the volume element; activating the optically transparent substrate to form an intramolecular hydrogen bond to a
nitrone oxygen in residual photochemically active dye, to stabilize the optically readable datum.
No. of Pages : 54 No. of Claims : 25
The Patent Office Journal 24/10/2008 26273