Patent US2222885A successfully refreshed from Google Patents.
Patent EP0072627A2 successfully refreshed from Google Patents.
EP0072627A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fibre optic sensor with bonded dye
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1982-07-20
•
Granted: —
•
Expires: 2002-07-20
Abstract
Abstract For detecting changes in chemical or physical parameters an optical fibre core has bonded to its surface a chromophore responsive to the parameter. The core preferably has a porous surface with the chromophore coating extending into the porous'structure.
Inventors
- 👤 John Harry William Cramp
- 👤 Robert Ferguson Reid
- 👤 Robertthomas Murray
- 👤 Roy Marcel Mortier
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/7703; G01N2021/7706; G01N2021/7709; G01N2021/7713; G01N2021/7716; G01N21/78; G01N21/80
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
30 words
A sensor for detecting changes in a chemical or physical parameter comprising an optical fibre core to the surface of which is chemically bonded a chromophore responsive to the parameter.
Claim 2
Dependent Claim
30 words
A sensor for detecting changes in a chemical or physical parameter comprising an optical fibre core to the surface of which is chemically bonded a chromophore responsive to the parameter.
Claim 3
Dependent Claim
35 words
A sensor as claimed in claim 1 wherein the surface to which the chromophore is bonded is a surface of a porous material and includes at least some of the surface area within the pores.
Claim 4
Dependent Claim
25 words
A sensor as claimed in claim 2 wherein the core comprises a non-porous portion surrounded by a porous layer to which the chromophore is bonded.
Claim 5
Dependent Claim
26 words
A sensor as claimed in claim 3 wherein the porous layer is integral with the non-porous portion, having been formed by etching a substantially non-porous fibre.
Claim 6
Dependent Claim
31 words
A sensor as claimed in claim 3 wherein the optical fibre core is a composite of a non-porous material surrounded by and in intimate contact with a layer of porous material.
Claim 7
Dependent Claim
25 words
A sensor as claimed in any one of the preceding claims, wherein the chromophore is a dye molecule whose colour is responsive to the parameter.
Claim 8
Dependent Claim
12 words
A sensor as claimed in claim 6 wherein the parameter is pH.
Claim 9
Dependent Claim
56 words
A sensor as claimed in any one of the preceding claims, wherein the material forming the surface to which the chromophore is.bonded is a silicate glass, the chromophore being bonded to the glass using an intermediate silane coupling agent comprising a silane functional group with affinity for the glass and a group reactive with the chromophore.
Claim 10
Dependent Claim
24 words
A sensor as claimed in claim 8 wherein the chromophore is a dye molecule linked to the silane coupling agent via a triazine ring.
Claim 11
Dependent Claim
47 words
A sensitive fibre optic probe comprising a sensor as claimed in any one of the preceding claims and fibre optic means for launching light into the sensor and for collecting the light or modification thereof after it has been transmitted through at least part of the sensor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.