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

(12) PATENT APPLICATION PUBLICATION (21) Application No.6586/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :29/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "PHOTOCATALYST MATERIAL, PHOTOCATALYST COMPOSITION USING THE SAME AND
PHOTOCATALYST PRODUCT"
(71)Name of Applicant :
1)TOSHIBA MATERIALS CO. LTD.
(51) International classification :B01J 35/02
Address of Applicant :8 SHINSUGITA-CHO, ISOGO-KU,
(31) Priority Document No :2066-024918
YOKOHAMA-SHI, KANAGAWA 235-8522 JAPAN. Japan
(32) Priority Date :01/02/2006
(72)Name of Inventor :
(33) Name of priority country :Japan
1)NAKANO KAYO
(86) International Application No :PCT/JP2007/051600
2)SATO AKIRA
Filing Date
:31/01/2007
3)SHIRAKAWA YASUHIRO
(87) International Publication No :WO 2007/088891
4)OKAMURA MASAMI
(61) Patent of Addition to Application
:NA
5)MATSUDA RYOTARO
Number
:NA
6)KAMAKURA TAKAYA
Filing Date
7)OTSUKA KAZUNARI
(62) Divisional to Application Number :NA
8)YOKOKURA KIYOSHI
Filing Date
:NA
9)OKAWA HIDEKI
10)ISHIZAKI ARIYOSHI
(57) Abstract :
An object of the invention is to provide a photocatalyst material having a higher catalyst effect than conventional photocatalyst
materials. The photocatalyst material of the invention contains, as its major component, a tungsten oxide powder excited by a light
source which emits light having a wavelength of 430 to 500 nm, the photocatalyst material having a decomposition ability of 50% or
more wherein the decomposition ability is given by the following equation based on the following test: [Test for decomposition
ability] lg of a tungsten oxide powder and 20 ppm of acetaldehyde (amount A) are poured into a 3-liter glass container, and
acetaldehyde (amount B) is measured after light having a peak wavelength of 460 nm ± 10 nm is irradiated to the mixture for 2 hours
to measure the decomposition ability (%): Decomposition ability (%) = [(acetaldehyde amount A - acetaldehyde amount
B)/acetaldehyde amount A] x 100.
No. of Pages : 92 No. of Claims : 15
The Patent Office Journal 24/10/2008 26075