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:
Jul. 11, 2023
Filed:
Mar. 01, 2019
Applicant:
Figaro Engineering Inc., Minoo, JP;
Inventor:
Kuniyuki Izawa, Minoo, JP;
Assignee:
FIGARO ENGINEERING INC., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 27/12 (2006.01); G01N 33/00 (2006.01); G01N 1/24 (2006.01);
U.S. Cl.
CPC ...
G01N 27/12 (2013.01); G01N 1/24 (2013.01); G01N 33/0009 (2013.01); G01N 33/0011 (2013.01); G01N 33/0016 (2013.01); G01N 33/0027 (2013.01); G01N 33/0031 (2013.01); G01N 33/0067 (2013.01);
Abstract
A gas detector comprises a metal oxide semiconductor gas sensor whose resistance decreases in reducing gases and a digital information processing device that treats the output of the gas sensor and compares the output with a comparison value for gas detection. The digital information processing device extracts data representing the resistance of the gas sensor in air from the output of the gas sensor and generates the comparison value such that the larger the resistance of the gas sensor in air is, the larger the ratio between the resistance of the gas sensor in air and a resistance value corresponding to the comparison value is.