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:
Oct. 07, 2025
Filed:
Nov. 17, 2022
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Toyoda Gosei Co., Ltd., Aichi, JP;
Taizo Masuda, Yokohama, JP;
Ryota Tomizawa, Mishima, JP;
Kenichi Okumura, Gotemba, JP;
Tatsuya Hasegawa, Ama, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
TOYODA GOSEI CO., LTD., Kiyosu, JP;
Abstract
In an apparatus producing hydrogen gas by a decomposition reaction of water using a photocatalyst, the water is warmed with waste heat of a light source for improving the production efficiency of hydrogen gas. The hydrogen gas producing apparatuscomprises a container portion receiving water; a photocatalyst body, dispersed or placed in the water, having a photocatalyst material to generate excited electrons and electron holes by irradiation of light, causing the decomposition reaction of water which decomposes water into hydrogen and oxygen to generate hydrogen gas; a light source emitting the light to be irradiated to the photocatalyst body; and a housing carrying the light source; wherein the housing is placed in the water, which is warmed by the waste heat of the light source discharged from the housing surface which is coated with a photocatalyst material.