Patent US4172015A successfully refreshed from Google Patents.
US4172015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 17:31
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)
US3038848A
Cited
US2943028A
Cited
US3096258A
Cited
US3337441A
Cited
US3793158A
Cited
US3856649A
Cited
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 |