US3898147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicarbonate ion electrode and sensor
Assignee: DS MEDICAL PRODUCTS Co A CORP
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Filing: 1974-08-02
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Granted: 1975-08-05
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Expires: 1994-08-02
Abstract
Abstract A bicarbonate ion electrode is described which has an electrode lead, an electrochemically active region of silver and a silver halide other than a fluoride at one end thereof, an electrolyte containing at least the bicarbonate ion to be detected and an ion which enters into electrochemical equilibrium with the active region of the lead in contact with the active region, a hydrogen ion permeable membrane encapsulating the active region and the electrolyte, and electrical insulation covering the remaining portion of the electrode lead. When the potential of the electrode is measured with respect to that of an external reference electrode, a bicarbonate ion sensor is provided.
Inventors
- 👤 Leonard W Niedrach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:23
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A BICARBONATE ION ELECTRODE COMPRISES A FLEXIBLE ELONGATED ELECTRODE LEAD AN ELECTROCHEMICALLY ACTIVE REGION SHOWING ELECTROCHEMICAL RESPONSE TO BICARBONATE ION CHANGES ADHERING TIGHTLY TO AND IN ELECTRICAL CONTACT WITH ONE END PORTION OF THE ELECTRODE LEAD ELECTRICAL INSULATION SURROUND THE ELECTRODE LEAD AN ELECTROLYTE CONTAINING AT LEAST THE BICARBONATE ION TO BE DETECTED AND AN ION WHICH ENTERS INTO ELECTROCHEMICAL EQUILIBRIUM WITH THE ACTIVE REGION OF THE LEAD CONTACTING THE ELECTROCHEMICALLY ACTIVE REGION AND AN OUTER SHEATH OF A HYDROGEN ION PERMEABLE MEMBRANE ENCAPSULATING THE ELECTROCHEMICALLY ACTIVE REGION AND THE ELECTROLYTE THE HYDROGEN ION PERMEABLE MEMBRANE BEING A HYDROPHOBIX ELASTOMER WITH A DIELECTRIC CONSTANT OF FROM 4 TO 13 AND CONTAINING A HYDROPHOBIC AND LIPOPHILIC H+ ION CARRIER.
Claim 2
Dependent Claim
118 words
A BICARBONATE ION ELECTRODE COMPRISES A FLEXIBLE ELONGATED ELECTRODE LEAD AN ELECTROCHEMICALLY ACTIVE REGION SHOWING ELECTROCHEMICAL RESPONSE TO BICARBONATE ION CHANGES ADHERING TIGHTLY TO AND IN ELECTRICAL CONTACT WITH ONE END PORTION OF THE ELECTRODE LEAD ELECTRICAL INSULATION SURROUND THE ELECTRODE LEAD AN ELECTROLYTE CONTAINING AT LEAST THE BICARBONATE ION TO BE DETECTED AND AN ION WHICH ENTERS INTO ELECTROCHEMICAL EQUILIBRIUM WITH THE ACTIVE REGION OF THE LEAD CONTACTING THE ELECTROCHEMICALLY ACTIVE REGION AND AN OUTER SHEATH OF A HYDROGEN ION PERMEABLE MEMBRANE ENCAPSULATING THE ELECTROCHEMICALLY ACTIVE REGION AND THE ELECTROLYTE THE HYDROGEN ION PERMEABLE MEMBRANE BEING A HYDROPHOBIX ELASTOMER WITH A DIELECTRIC CONSTANT OF FROM 4 TO 13 AND CONTAINING A HYDROPHOBIC AND LIPOPHILIC H+ ION CARRIER.
Claim 3
Dependent Claim
30 words
A bicarbonate ion electrode as in claim 1, in which the electrochemically active region showing a response to bicarbonate changes is silver and a silver halide other than a fluoride.
Claim 4
Dependent Claim
17 words
A bicarbonate ion electrode as in claim 1, in which the electrolyte is an immobilized aqueous solution.
Claim 5
Dependent Claim
20 words
A bicarbonate ion electrode as in claim 1, in which the hydrophobic and lipophilic H ion carrier is p-octadecyloxy-m-chlorophenylhydrazone mesoxalonitrile.
Claim 6
Dependent Claim
26 words
A system for sensing bicarbonate ion comprising a reference electrode, the electrode of claim 1 and means connected to said electrodes for sensing a potential therebetween.
References Cited (Backward Citations)
US3357908A
Cited
US3719575A
Cited
US3811184A
Cited
US3730868A
Cited
US3719576A
Cited
US3767553A
Cited
US3723281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |