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1. (WO1991007659) GAS SENSORS AND COMPOUNDS SUITABLE THEREFOR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007659 International Application No.: PCT/GB1990/001707
Publication Date: 30.05.1991 International Filing Date: 07.11.1990
Chapter 2 Demand Filed: 29.04.1991
IPC:
G01N 27/12 (2006.01) ,G01N 31/22 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27
Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
02
by investigating impedance
04
by investigating resistance
12
of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
31
Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroups; Apparatus specially adapted for such methods
22
using chemical indicators
Applicants:
BRITISH TECHNOLOGY GROUP LTD. [GB/GB]; 101 Newington Causeway London SE1 6BU, GB (AllExceptUS)
SILVER, Jack [GB/GB]; GB (UsOnly)
RICKWOOD, Kenneth, Ralph [GB/GB]; GB (UsOnly)
AHMET, Mustafa, Tahsin [GB/GB]; GB (UsOnly)
Inventors:
SILVER, Jack; GB
RICKWOOD, Kenneth, Ralph; GB
AHMET, Mustafa, Tahsin; GB
Agent:
EYLES, Winifred, Joyce; Patents Department British Technology Group Ltd. 101 Newington Causeway London SE1 6BU, GB
Priority Data:
8925246.408.11.1989GB
8925247.208.11.1989GB
9001634.624.01.1990GB
9001637.924.01.1990GB
Title (EN) GAS SENSORS AND COMPOUNDS SUITABLE THEREFOR
(FR) DETECTEURS DE GAZ ET COMPOSES UTILISABLES A CET EFFET
Abstract:
(EN) A gas sensor has a gas-sensing component which changes colour and/or conductivity on exposure to certain gases, which component comprises a (mono, di or tri) azatetrabenzoporphyrin. Certain (mono, di or tri) azatetrabenzoporphyrins containing a transition metal ion selected from chromium (III), vanadyl, manganese, cobalt or iron (III) are novel.
(FR) L'invention se rapporte à un détecteur de gaz contenant un composant de détection de gaz qui change de couleur et/ou de conductivité lors de son exposition à certains gaz et qui comprend une (mono-, di- ou tri-) azatétrabenzoporphyrine. Certaines (mono-, di- ou tri-) azatétrabenzoporphyrines qui contiennent un ion métallique de transition choisi dans un groupe formé du chrome (III), du vanadyle, du manganèse, du cobalt et du fer (III) constituent des composés nouveaux.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0500644US5318912US5451674JPH05505871