Patent US4645583A successfully refreshed from Google Patents.
US4645583A
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Reference electrode
Assignee: SHIRAI TSUNEO 1-46-18 CHUO NAKANO-KU TOKYO 164 JAPAN
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Filing: 1986-03-05
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Granted: 1987-02-24
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Expires: 2006-03-05
Abstract
Abstract A reference electrode in the form of a conductor, an ion sensitive field effect transistor or a liquid-membrane electrode kit, coated with a membrane of a high polymer which contains an arsonium borate. Since the reference electrode dispenses with a liquid junction region which has been required of a conventional liquid-junction type reference electrode, it has the following features. (A) It does not matter if the reference electrode is allowed to dry during storage. (B) The test solution is not contaminated by the internal solution. (C) Reduction in size of the reference electrode can be easily attained.
Inventors
- 👤 Tsuneo Shirai
- 👤 Koji Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:44
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/301
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A reference electrode characterized in that it uses as an electrode membrane a membrane of a high polymer containing a salt which consists of a cation represented by the formula (R 1 R 2 R 3 R 4 A s ) + and an anion represented by the formula (R 1 ' R 2 ' R 3 ' R 4 ' B) - (wherein R 1 , R 2 , R 3 , R 4 , R 1 ', R 2 ', R 3 ' and R 4 ' each represent an alkyl group, a phenyl group or a phenyl group having a substituent).
Claim 2
Dependent Claim
104 words
A reference electrode characterized in that it uses as an electrode membrane a membrane of a high polymer containing a salt which consists of a cation represented by the formula (R 1 R 2 R 3 R 4 A s ) + and an anion represented by the formula (R 1 ' R 2 ' R 3 ' R 4 ' B) - (wherein R 1 , R 2 , R 3 , R 4 , R 1 ', R 2 ', R 3 ' and R 4 ' each represent an alkyl group, a phenyl group or a phenyl group having a substituent).
Claim 3
Dependent Claim
15 words
A reference electrode as set forth in claim 1, wherein said salt is tetraphenylarsonium tetraphenylborate.
Claim 4
Dependent Claim
20 words
A reference electrode as set forth in claim 1, wherein the thickness of said high polymer membrane is 5-500 μm.
Claim 5
Dependent Claim
20 words
A reference electrode as set forth in claim 1, wherein the high polymer of said high polymer membrane is plasticized.
Claim 6
Dependent Claim
17 words
A reference electrode as set forth in claim 1, wherein said high polymer is plasticized polyvinyl chloride.
Claim 7
Dependent Claim
24 words
A reference electrode as set forth in claim 1, wherein the electrode coated with said electrode membrane is an ion sensitive field effect transistor.
References Cited (Backward Citations)
US4269682A
Cited
US4592824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |