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US4172015A
Expired / Lapsed
US
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Electrochemical device and analytical method
Assignee: Imperial Chemical Industries Ltd
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Filing: 1978-02-23
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Granted: 1979-10-23
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Expires: 1998-02-23
Abstract
Abstract An electrochemical device of the static-reagent type for the detection and/or monitoring of a component of a fluid, which comprises two or more electrodes in contact with a reagent which reacts chemically with the fluid component to be detected and/or monitored so as to cause an electric current to flow between the electrodes and which comprises an aqueous solution of a deliquescent substance.
Inventors
- 👤 Robert A. Bamford
- 👤 Charles H. Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:46
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/4162
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
An electrochemical device of the static-reagent type for the detection and/or monitoring of a component of a gaseous fluid, which is in the form of a probe comprising two or more wire electrodes wrapped externally and separately around an absorbent support saturated with an electrolyte which is an aqueous solution of a deliquescent substance which substance is capable of undergoing a chemical reaction with the component to be detected and/or monitored when exposed to that substance so as to cause an electric current to flow between the electrodes or to cause a change in an electric current flowing between the electrodes.
Claim 2
Dependent Claim
101 words
An electrochemical device of the static-reagent type for the detection and/or monitoring of a component of a gaseous fluid, which is in the form of a probe comprising two or more wire electrodes wrapped externally and separately around an absorbent support saturated with an electrolyte which is an aqueous solution of a deliquescent substance which substance is capable of undergoing a chemical reaction with the component to be detected and/or monitored when exposed to that substance so as to cause an electric current to flow between the electrodes or to cause a change in an electric current flowing between the electrodes.
Claim 3
Dependent Claim
22 words
An electrochemical device as claimed in claim 1 wherein the absorbent member around which the electrodes are wrapped comprises a fibrous tube.
Claim 4
Dependent Claim
32 words
An electrochemical device as claimed in claim 1 or claim 2 wherein there is provided a reservoir of the reagent in communication with the absorbent member around which the electrodes are wrapped.
Claim 5
Dependent Claim
28 words
An electrochemical device as claimed in claim 3 wherein the reservoir comprises a second absorbent member in contact with the absorbent member around which the electrodes are wrapped.
Claim 6
Dependent Claim
17 words
An electrochemical device as claimed in claim 4 wherein the second absorbent member is a fibrous tube.
Claim 7
Dependent Claim
17 words
An electrochemical device as claimed in claim 4 wherein a water-impermeable sleeve surrounds the second absorbent member.
Claim 8
Dependent Claim
15 words
An electrochemical device as claimed in claim 1 wherein the electrodes are made of platinum.
Claim 9
Dependent Claim
21 words
An electrochemical device as claimed in claim 1 wherein terminals are provided for connecting the device to alarm or recorder systems.
Claim 10
Dependent Claim
18 words
An electrochemical device as claimed in claim 1 wherein the reagent is an aqueous solution of calcium bromide.
Claim 11
Dependent Claim
18 words
An electrochemical device as claimed in claim 1 wherein the reagent is an aqueous solution of lithium iodide.
Claim 12
Dependent Claim
85 words
A method for the detection and/or monitoring of a component of a fluid which comprises applying a voltage potential across the electrodes of a device as claimed in claim 1 to cause an electric current to flow between the electrodes, exposing the device to the fluid containing the component to be detected and/or monitored so causing said component to undergo a chemical reaction with the electrolyte in the device, and measuring the change resulting from the reaction in the electric current flowing between the electrodes.
References Cited (Backward Citations)
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US3096258A
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US3337441A
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US3793158A
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US3856649A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |