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:
Jun. 29, 1976
Filed:
Mar. 20, 1974
Applicant:
Inventors:
Kuo Wei Chang, Lexington, MA (US);
Sol Aisenberg, Natick, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
2041 / ; 136 / ; 324 / ;
Abstract
Alcohol concentrations present in a gaseous breath sample are monitored by measuring the magnitude of the short circuit current passing through the external circuit between the anode and cathode of a fuel cell. The anode and cathode are positioned on opposite sides of a cationic exchange membrane and an aqueous acid electrolyte between the cathode and membrane assists ion and electron transfer. Alcohol introduced at the anode is electrooxidized while oxygen supplied to the cathode is electroreduced.