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:
Dec. 23, 2003
Filed:
Aug. 14, 2002
Applicant:
Inventors:
Wenfeng Peng, Mississauga, CA;
P. Richard Warburton, Moon Township, PA (US);
Assignee:
Industrial Scientific Corporation, Oakdale, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/726 ; G01N 2/7404 ;
U.S. Cl.
CPC ...
G01N 2/726 ; G01N 2/7404 ;
Abstract
A compact, long-lived oxygen sensor having an aqueous electrolyte and three gas diffusion electrodes, a working electrode, a reference electrode and a counter electrode. A porous, hydrophobic means is employed in conjunction with the counter electrode to allow air pressure in the sensor to be balanced with atmospheric pressure. The working and reference electrodes are further protected from contact with flow of electrolyte from the reservoir by a separator, so that the current output is fairly independent of sensor movement.