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:
Aug. 23, 1983
Filed:
Nov. 27, 1981
Applicant:
Inventors:
Gulu N Advani, San Jose, CA (US);
Robert Beard, Placerville, CA (US);
Leonard Nanis, Palo Alto, CA (US);
Assignee:
Sierra Monitor Corporation, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 / ; 73 23 ;
Abstract
A gas measurement method for metal-oxide gas sensors. The sensors are thermally cycled by sequential heating and cooling. It has been found that a continuous, concentration-dependent, unique signature for different gases is produced during thermal cycling. Once signature patterns are developed for different concentrations, an unknown gas concentration for which a signature pattern exists may be sampled, either by amplitude or time-dependent samples, in order to identify the gas in its concentration.