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:
Jan. 06, 1987
Filed:
Apr. 21, 1986
Applicant:
Inventors:
Anthony D Tantram, Great Bookham, GB;
Yat S Chan, London, GB;
Assignee:
City Technology Limited, , GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 23 ; 204 / ; 204415 ;
Abstract
The housing 1 of a gas sensor carries a diffusion barrier 2 for restricting the access of gas to the sensing element 4 and a filter 3 mounted between the diffusion barrier 2 and the sensing element 4. As a result, gas reaching the filter 3 must first pass through the diffusion barrier 2 so that its flux is substantially reduced and the life of the filter is increased correspondingly.