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. 26, 2013
Filed:
Aug. 01, 2008
Kayo Nakano, Yokohama, JP;
Akira Sato, Yokohama, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Masami Okamura, Yokohama, JP;
Ryotaro Matsuda, Yokosuka, JP;
Takaya Kamakura, Yokosuka, JP;
Kazunari Otsuka, Yokohama, JP;
Kiyoshi Yokokura, Yokosuka, JP;
Hideki Okawa, Yokohama, JP;
Ariyoshi Ishizaki, Yokohama, JP;
Kayo Nakano, Yokohama, JP;
Akira Sato, Yokohama, JP;
Yasuhiro Shirakawa, Yokohama, JP;
Masami Okamura, Yokohama, JP;
Ryotaro Matsuda, Yokosuka, JP;
Takaya Kamakura, Yokosuka, JP;
Kazunari Otsuka, Yokohama, JP;
Kiyoshi Yokokura, Yokosuka, JP;
Hideki Okawa, Yokohama, JP;
Ariyoshi Ishizaki, Yokohama, JP;
Toshiba Materials Co., Ltd., Yokohama-shi, JP;
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]: 1 g 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]×100.