Patent US4528085A successfully refreshed from Google Patents.
US4528085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion selective electrode and process of preparing the same
Assignee: Fujifilm Holdings Corp
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Filing: 1983-03-15
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Granted: 1985-07-09
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Expires: 2003-03-15
Abstract
Abstract An ion selective electrode comprising a support having provided thereon, in sequence, a conductive layer and an ion selective layer, which is characterized by having at least one groove through the conductive layer and covering the surface of the groove with the ion selective layer is disclosed. Half cells or electrodes useful for the measurement of ionic activity of chlorine, sodium, potassium or, carbonate or hydrogen carbonate ions in blood or other aqueous sample liquids can be prepared in an extremely simple manner. The single ion selective electrode element comprising paired ion selective electrodes in accordance with the present invention are electrochemically equivalent. A process for forming the same is also disclosed.
Inventors
- 👤 Masao Kitajima
- 👤 Osamu Seshimoto
- 👤 Shigemitsu Mizutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:50
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
45 words
An ion selective electrode comprising a support having provided thereon, in sequence, a conductive layer and a substantially electrically insulating ion selective layer, said conductive layer having at least one groove therethrough, and, the surface of said groove being covered with said ion selective layer.
Claim 2
Dependent Claim
45 words
An ion selective electrode comprising a support having provided thereon, in sequence, a conductive layer and a substantially electrically insulating ion selective layer, said conductive layer having at least one groove therethrough, and, the surface of said groove being covered with said ion selective layer.
Claim 3
Dependent Claim
25 words
The ion selective electrode as claimed in claim 1 wherein said groove has a depth at least 10 times the thickness of said conductive layer.
Claim 4
Dependent Claim
22 words
The ion selective electrode as claimed in claim 1 wherein said groove has an opening width of 10 μm to 1 mm.
Claim 5
Dependent Claim
34 words
The ion selective electrode as claimed in claim 1 wherein said conductive layer is selected from the group consisting of a layer of a conductive metal and a layer of a conductive metal oxide.
Claim 6
Dependent Claim
42 words
The ion selective electrode as claimed in claim 4 wherein a layer of a water insoluble salt of the conductive metal employed for said conductive layer (a water-insoluble metal salt layer) is provided between said conductive layer and said ion selective layer.
Claim 7
Dependent Claim
26 words
The ion selective electrode as claimed in claim 5 wherein an electrolyte layer is provided between said water-insoluble metal salt layer and said ion selective layer.
Claim 8
Dependent Claim
29 words
The ion selective electrode as claimed in claim 5 wherein said conductive layer is a silver layer and said water insoluble metal salt layer is a silver halide layer.
Claim 9
Dependent Claim
19 words
The ion selective electrode as claimed in claim 7 wherein said silver halide layer is a silver chloride layer.
Claim 10
Dependent Claim
33 words
The ion selective electrode as claimed in claim 1 wherein at least one of the conductive layers separated from each other by said groove have an area sufficient to provide an electro-motive force.
Claim 11
Dependent Claim
35 words
A single electrode element comprising a pair of the ion selective electrodes of claim 1 wherein said support and said substantially electrically insulating ion selective layer are common to the pair of ion selective electrodes.
Claim 12
Dependent Claim
25 words
The single electrode element as claimed in claim 10 wherein said groove has a depth at least 10 times the thickness of said conductive layer.
Claim 13
Dependent Claim
22 words
The single electrode element as claimed in claim 10 wherein said groove has an opening width of 10 μm to 1 mm.
Claim 14
Dependent Claim
33 words
The single electrode element as claimed in claim 10 wherein at least one of the conductive layers separated from each other by said groove have an area sufficient to provide an electro-motive force.
Claim 15
Dependent Claim
34 words
The single electrode element as claimed in claim 10 wherein said conductive layer is selected from the group consisting of a layer of a conductive metal and a layer of a conductive metal oxide.
Claim 16
Dependent Claim
42 words
The single electrode element as claimed in claim 14 wherein a layer of a water insoluble salt of the conductive metal employed for said conductive layer (a water-insoluble metal salt layer) is provided between said conductive layer and said ion selective layer.
Claim 17
Dependent Claim
26 words
The single electrode element as claimed in claim 15 wherein an electrolyte layer is provided between said water-insoluble metal salt layer and said ion selective layer.
Claim 18
Dependent Claim
29 words
The single electrode element as claimed in claim 15 wherein said conductive layer is a silver layer and said water insoluble metal salt layer is a silver halide layer.
Claim 19
Dependent Claim
19 words
The single electrode element as claimed in claim 17 wherein said silver halide layer is a silver chloride layer.
References Cited (Backward Citations)
US4020830A
Cited
US4020830B1
Cited
US4053381A
Cited
US4269682A
Cited
US4214968A
Cited
US4184936A
Cited
US4273639A
Cited
EP0023156A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |