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:
Apr. 18, 1989
Filed:
Jun. 30, 1987
Applicant:
Inventors:
Eric Jones, Chelmsford, GB;
Alan M Doncaster, Maldon, GB;
Assignee:
English Electric Valve Company Limited, Essex, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C / ; G01N / ;
U.S. Cl.
CPC ...
2041921 ; 204410 ; 204431 ; 73 2 / ;
Abstract
Hydrogen Sulphide is a toxic gas present in many environments. It is necessary for a detector to be highly sensitive and not to respond to other common gases. The sensor is made up of electrodes (5) coated with a thin layer (6) of material comprising the oxides of molybdenum and tungsten and in the presence of hydrogen sulphide gas, changes its resistance. The layer is formed in such a way that a bronze-like ordered lattice is formed, containing molybdenum, tungsten and oxygen ions.