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. 28, 2020
Filed:
May. 25, 2016
Applicant:
Nitto Denko Corporation, Osaka, JP;
Inventor:
Qianxi Lai, Carlsbad, CA (US);
Assignee:
Nitto Denko Corporation, Osaka, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 27/12 (2006.01); G01N 33/497 (2006.01);
U.S. Cl.
CPC ...
G01N 27/125 (2013.01); G01N 33/497 (2013.01);
Abstract
Gas sensors are described herein that are useful for selectively detecting a second gas (e.g. isoprene) in the presence of a first gas (e.g. acetone). The gas sensors include a sensor element which includes a semiconductor sensing material and a porous material. The sensor element is configured so that the porous material absorbs more of the first gas than the second gas. Thus, when the gas being analyzed, such as a mammalian (including human) breath, a greater proportion of the second gas comes into contact with the semiconductor sensing material.