US4670127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion-sensitive membrane electrode
Assignee: Avl AG
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Filing: 1985-11-18
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Granted: 1987-06-02
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Expires: 2005-11-18
Abstract
Abstract In order to produce a sensitive membrane electrode with high selectivity with respect to other anions and lipophilic ions or interfering substances, the membrane is based on an unplasticized polymer matrix whose content of electroactive component is between 50 and 90 percent by weight.
Inventors
- 👤 Christoph Ritter
- 👤 Massoud Ghahramani
- 👤 Hermann Marsoner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:29
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
68 words
An ion-sensitive membrane electrode which includes an anion-sensitive membrane, said anion-sensitive membrane containing no plasticizer component and comprising an unplasticized polymer matrix which consists of an unplasticized polyvinyl chloride matrix and between 50 and 90% by weight of at least one electroactive component incorporated in said polyvinyl chloride matrix, said electroactive component being selected from the group consisting of a quaternary ammonium compound and a phosphonium halide compound.
Claim 2
Dependent Claim
68 words
An ion-sensitive membrane electrode which includes an anion-sensitive membrane, said anion-sensitive membrane containing no plasticizer component and comprising an unplasticized polymer matrix which consists of an unplasticized polyvinyl chloride matrix and between 50 and 90% by weight of at least one electroactive component incorporated in said polyvinyl chloride matrix, said electroactive component being selected from the group consisting of a quaternary ammonium compound and a phosphonium halide compound.
Claim 3
Dependent Claim
22 words
An ion-sensitive membrane electrode according to claim 1, wherein said electroactive component incorporated in said unplasticized polyvinyl chloride matrix is methyl-tri-dodecyl-ammonium chloride.
Claim 4
Dependent Claim
22 words
An ion-sensitive membrane electrode according to claim 2, wherein said anion-sensitive membrane includes 60 to 80% by weight of said methyl-tri-dodecyl-ammonium chloride.
Claim 5
Dependent Claim
17 words
An ion-sensitive membrane electrode according to claim 1, wherein said anion-sensitive membrane is sensitive to chloride ions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |