Patent US4282079A successfully refreshed from Google Patents.
US4282079A
Expired / Lapsed
US
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Planar glass ion-selective electrode
Assignee: Clinical Diagnostic Systems Inc
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Filing: 1980-02-13
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Granted: 1981-08-04
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Expires: 2000-02-13
Abstract
Abstract A planar glass ion-selective electrode is described comprising an inherently conductive internal reference electrode, a cation-selective glass membrane and means for adhering the reference electrode to the glass membrane. The thickness of the glass membrane is uniform in regions intended for contact with a sample for analysis. The glass electrode is useful in assaying for the presence of sodium, hydrogen, potassium and other cations present in samples such as blood, urine, plasma, and serum.
Inventors
- 👤 Jack C. Chang
- 👤 James R. Sandifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:32
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/36
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A planar ion-selective glass electrode comprising: (a) an inherently conductive internal reference electrode comprising a metal/metal salt reference material, said reference electrode comprising a conducting layer of a metal in contact with a layer of an insoluble salt of said metal, and an inherently conductive adhesive electrolyte layer comprising a water-soluble salt having as an anion the anion of said metal salt layer and a polymeric binder; (b) a cation-selective glass membrane of predetermined uniform thickness in regions intended for contact with a sample for analysis; and (c) means for adhering said reference electrode to said glass membrane comprising said inherently conductive adhesive electrolyte layer.
Claim 2
Dependent Claim
105 words
A planar ion-selective glass electrode comprising: (a) an inherently conductive internal reference electrode comprising a metal/metal salt reference material, said reference electrode comprising a conducting layer of a metal in contact with a layer of an insoluble salt of said metal, and an inherently conductive adhesive electrolyte layer comprising a water-soluble salt having as an anion the anion of said metal salt layer and a polymeric binder; (b) a cation-selective glass membrane of predetermined uniform thickness in regions intended for contact with a sample for analysis; and (c) means for adhering said reference electrode to said glass membrane comprising said inherently conductive adhesive electrolyte layer.
Claim 3
Dependent Claim
21 words
The electrode of claim 1 wherein said binder comprises an interpolymer comprising acrylic acid, unsaturated carboxylic acid ester, and sulfobetaine units.
Claim 4
Dependent Claim
43 words
The electrode of claim 2 further including a support which comprises an electrically insulating polymeric film, said conducting metal layer comprises silver, said layer of insoluble salt comprises a halide salt of silver, and said glass membrane comprises a sodium-selective homogeneous glass membrane.
Claim 5
Dependent Claim
38 words
The electrode of claim 1 wherein said binder comprises a member selected from the group consisting of hydrated or otherwise inherently conductive forms of polyvinyl alcohol, gelatin, agarose, polyacrylamide, polyvinyl pyrrolidone, polyhydroxyethyl methacrylate, poly(hydroxyethyl acrylate) and polyacrylic acid.
Claim 6
Dependent Claim
18 words
The electrode of claim 1 wherein said layer of insoluble salt comprises a halide salt of said metal.
Claim 7
Dependent Claim
75 words
A planar ion-selective glass electrode comprising: (a) an inherently conductive redox internal reference electrode comprising an inherently conductive, adhesive redox couple layer comprising a redox couple and a binder over an electrically conducting layer; (b) a cation-selective glass membrane of predetermined uniform thickness in a region thereof intended for contact with a sample for analysis; and (c) means for adhering said reference electrode to said glass electrode comprising said inherently conductive, adhesive redox couple layer.
Claim 8
Dependent Claim
75 words
A planar ion-selective glass electrode comprising: (a) an inherently conductive redox internal reference electrode comprising an inherently conductive, adhesive redox couple layer comprising a redox couple and a binder over an electrically conducting layer; (b) a cation-selective glass membrane of predetermined uniform thickness in a region thereof intended for contact with a sample for analysis; and (c) means for adhering said reference electrode to said glass electrode comprising said inherently conductive, adhesive redox couple layer.
Claim 9
Dependent Claim
22 words
The electrode of claim 6 wherein said conducting layer comprises a conductor selected from the group consisting of carbon, platinum, and nickel.
Claim 10
Dependent Claim
10 words
The electrode of claim 6 wherein said conductor is carbon.
Claim 11
Dependent Claim
16 words
The electrode of claim 6 wherein said conducting layer comprises a particulate conductor and a binder.
Claim 12
Dependent Claim
12 words
The electrode of claim 9 wherein said particulate conductor is particulate carbon.
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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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |