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:
Mar. 07, 2006
Filed:
Jun. 16, 2003
Chuan-bao Wang, Oakdale, PA (US);
Beth Tomasovic, Cranberry Township, PA (US);
P. Richard Warburton, Moon Township, PA (US);
Annie Q. Wang, Pittsburgh, PA (US);
Chuan-Bao Wang, Oakdale, PA (US);
Beth Tomasovic, Cranberry Township, PA (US);
P. Richard Warburton, Moon Township, PA (US);
Annie Q. Wang, Pittsburgh, PA (US);
Industrial Scientific Corporation, Oakdale, PA (US);
Abstract
A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner layer coated on the electric heating element and containing a precious metal catalyst supported on a porous oxide, the precious metal catalyst catalyzing combustion of a combustible gas to be detected by the element, and an outer layer overlaying the first layer, and containing a catalytic compound capable of trapping gases which poison the precious metal catalyst, the catalytic compound being supported on a porous oxide.