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:
Jan. 20, 2009
Filed:
Nov. 14, 2002
Applicants:
Seiichi Otani, Tokyo, JP;
Yukio Nakamura, Tokyo, JP;
Mamoru Furusato, Tokyo, JP;
Inventors:
Assignee:
Riken Keiki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 31/12 (2006.01); G01N 27/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hydrogen sensorhas a fitting base platein which a gas-sensing chamberis formed, a specimen gas intakeformed on said fitting base plateopening toward an exit passageand introducing hydrogen gas into the gas-sensing chambera gas-sensing elementheld in the gas-sensing chamberand adapted to sense hydrogen gas, and a water-repelling filtercovering the specimen gas intake