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. 31, 1998
Filed:
Jan. 06, 1995
Applicant:
Inventors:
Jack Silver, Golders Green, GB;
Kenneth Ralph Rickwood, Colchester, GB;
Mustafa Tahsin Ahmet, Beckenham, GB;
Assignee:
British Technology Group, Ltd., London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
422 90 ; 422 86 ; 422 88 ; 422 98 ; 436106 ; 436116 ; 436138 ; 73 232 ; 204415 ; 204426 ;
Abstract
A gas sensor has a gas sensing component which permits measurement of a change in optical absorption and, optionally also a change in electrical conductivity on exposure to an environment containing certain gases. The gas sensing component comprises a metal bis aromatic macrocycle which may be a new mixed rare earth metal bis tetrabenzoporphyrin or tetrabenzoazaporphyrin.