US4925544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical sensor with solid phase electrolyte
Assignee: BTG International Ltd
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Filing: 1988-05-13
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Granted: 1990-05-15
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Expires: 2008-05-13
Abstract
Abstract An electrochemical sensor comprising an electrolyte and an analyte separated by a selectively permeable membrane preferably characterized in that the electrolyte is an electrically conductive solid comprising a homogeneous dispersion of a polymeric matrix phase and an electrically conductive salt and substantially free of water. Preferably the polymeric matrix phase is plasticized, the plasticizer forming a continuous phase in which the conductive salt is dissolved. The sensor is used, for example, for sensing and measuring gases especially in transcutaneous measurement of blood gases.
Inventors
- 👤 Lionel S. Goldring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
64 words
An electrochemical sensor comprising an electrolyte and an analyte separated by a selectively permeable membrane where the electrolyte comprises an electrically conductive solid comprising a homogeneous dispersion of a polymeric matrix phase, where the polymeric matrix phase is plasticized, and an electrically conductive salt said dispersion being substantially free of water, the plasticizer forming a continuous phase in which the conductive salt is dissolved.
Claim 2
Dependent Claim
64 words
An electrochemical sensor comprising an electrolyte and an analyte separated by a selectively permeable membrane where the electrolyte comprises an electrically conductive solid comprising a homogeneous dispersion of a polymeric matrix phase, where the polymeric matrix phase is plasticized, and an electrically conductive salt said dispersion being substantially free of water, the plasticizer forming a continuous phase in which the conductive salt is dissolved.
Claim 3
Dependent Claim
14 words
A sensor according to claim 1 where the polymetric phase is a polyvinyl alcohol.
Claim 4
Dependent Claim
33 words
A sensor according to claim 2 where the polymetric phase is a hydrolyzed polyvinyl acetate having a degree of hydrolysis of from 80 to 99% and a molecular weight of at least 5,000.
Claim 5
Dependent Claim
41 words
A sensor according to claim 3 where the plasticizer comprises an aliphatic or cycloaliphatic polyhydric alcohol having from 2 to 9 carbon atoms or a mixture of the least two alcohols having an average of from 2 to 3 hydroxy groups.
Claim 6
Dependent Claim
18 words
A sensor according to claim 3 where the plasticizer comprises a mixture of glycerol with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol or 2,2-diethyl-1,3-propanediol.
Claim 7
Dependent Claim
41 words
A sensor according to claim 2 where the plasticizer comprises an aliphatic or cycloaliphatic polyhydric alcohol having from 2 to 8 carbon atoms or a mixture of at least two alcohols having an average of from 2 to 3 hydroxy groups.
Claim 8
Dependent Claim
18 words
A sensor according to claim 2 where the plasticizer comprises a mixture of glycerol with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol or 2,2-diethyl-1,3-propanediol.
Claim 9
Dependent Claim
37 words
A sensor according to claim 1 where the polymetric phase has a solubility parameter of at least 24 megaPascalsq, and a hydrogen bonding parameter γ c (Crowley) greater than 18 or δ H (Hansen) greater than 17.
Claim 10
Dependent Claim
23 words
A sensor according to claim 8 where the plasticizer has about the same solubility parameter and hydrogen bonding parameter as the polymetric phase.
Claim 11
Dependent Claim
24 words
A sensor according to claim 9 where the plasticizer has a boiling point of at least 225° C. at 25° C. and 1 atmosphere.
Claim 12
Dependent Claim
14 words
A sensor according to claim 9 where the boiling point is at least 250°.
Claim 13
Dependent Claim
24 words
A sensor according to claim 8 where the plasticizer has a boiling point of at least 225° C. at 25° C. and 1 atmosphere.
Claim 14
Dependent Claim
14 words
A sensor according to claim 8 where the boiling point is at least 250°.
Claim 15
Dependent Claim
24 words
A sensor according to any one of claims 1 and 3-11 and 4-11 where the electrolyte has a thickness not greater than 25 micrometers.
References Cited (Backward Citations)
US4076596A
Cited
GB2054869A
Cited
GB2124387A
Cited
US4587101A
Cited
US4818361A
Cited
US4728588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |