US3932233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium electrode and membrane and composition for use therein
Assignee: Radiometer AS
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Filing: 1973-09-28
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Granted: 1976-01-13
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Expires: 1993-09-28
Abstract
Abstract Calcium di(aryl)phosphates, the aryl groups each carrying at least one carbon chain containing at least 3 carbon atoms, are used as electroactive materials in calcium electrodes. In a preferred calcium electrode, the calcium di(aryl)phosphate is calcium di(p-n-octylphenyl)phosphate which is incorporated in a membrane of polyvinyl chloride plasticized with di(p-n-octyl)-phenylphosphonate.
Inventors
- 👤 Jaromir Ruzicka
- 👤 Jens Christian Tjell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
91 words
An electrode for measuring the activity of calcium ions in a solution, comprising 1. an internal reference system, and 2. a calcium di(aryl)phosphate, said calcium di(aryl)phosphate being positioned in the electrode so as to be contactable with said measured solution and to be in electrical contact with said internal reference system, the aryl groups of said calcium di(aryl)phosphate each carrying at least one carbon chain containing at least three carbon atoms, the aryl groups of said calcium di(aryl)phosphate further carry electrophilic substitution, and the electrophilic substitution is nitro or halogen substitution.
Claim 2
Dependent Claim
91 words
An electrode for measuring the activity of calcium ions in a solution, comprising 1. an internal reference system, and 2. a calcium di(aryl)phosphate, said calcium di(aryl)phosphate being positioned in the electrode so as to be contactable with said measured solution and to be in electrical contact with said internal reference system, the aryl groups of said calcium di(aryl)phosphate each carrying at least one carbon chain containing at least three carbon atoms, the aryl groups of said calcium di(aryl)phosphate further carry electrophilic substitution, and the electrophilic substitution is nitro or halogen substitution.
Claim 3
Dependent Claim
50 words
An electrode for measuring the activity of calcium ions in a solution, comprising: a. an internal reference system, and b. calcium di(p-n-octylphenyl)phosphate, said calcium di(p-n-octylphenyl)phosphate being positioned in the electrode so as to be contactable with said measured solution and to be in electrical contact with said internal reference system.
Claim 4
Dependent Claim
50 words
An electrode for measuring the activity of calcium ions in a solution, comprising: a. an internal reference system, and b. calcium di(p-n-octylphenyl)phosphate, said calcium di(p-n-octylphenyl)phosphate being positioned in the electrode so as to be contactable with said measured solution and to be in electrical contact with said internal reference system.
Claim 5
Dependent Claim
17 words
An electrode as claimed in claim 2, wherein the calcium di(p-n-octylphenyl)phosphate is incorporated in an organic carrier.
Claim 6
Dependent Claim
19 words
An electrode as claimed in claim 3, wherein the organic carrier is a plastic plasticized with an organic plasticizer.
Claim 7
Dependent Claim
13 words
An electrode as claimed in claim 4, wherein the plastic is polyvinyl chloride.
Claim 8
Dependent Claim
13 words
An electrode as claimed in claim 5, wherein the plasticizer is a di(alkyl)arylphosphonate.
Claim 9
Dependent Claim
12 words
An electrode as claimed in claim 6, wherein the di(alkyl)arylphosphonate is di(n-octyl)phenylphosphonate.
Claim 10
Dependent Claim
14 words
An electrode as claimed in claim 3, wherein the organic carrier is a di(alkyl)arylphosphonate.
Claim 11
Dependent Claim
21 words
An electrode as claimed in claim 2, wherein the phenyl groups of said calcium di(p-n-octylphenyl)phosphate further carry nitro or halogen substitution.
Claim 12
Dependent Claim
21 words
An electrode as claimed in claim 2, wherein the calcium di(p-n-octylphenyl)phosphate is present in admixture with the corresponding di(p-n-octylphenyl) phosphoric acid.
Claim 13
Dependent Claim
24 words
A membrane for use in an electrode as claimed in claim 4, comprising calcium di(p-n-octylphenyl)phosphate incorporated in a plastic plasticized with an organic plasticizer.
Claim 14
Dependent Claim
13 words
A membrane as claimed in claim 11, wherein the plastic is polyvinyl chloride.
Claim 15
Dependent Claim
13 words
A membrane as claimed in claim 12, wherein the plasticizer is a di(alkyl)arylphosphonate.
Claim 16
Dependent Claim
17 words
A membrane as claimed in claim 13, comprising calcium di(p-n-octylphenyl)phosphate incorporated in polyvinyl chloride plasticized with di(n-octyl)phenylphosphonate.
Claim 17
Dependent Claim
19 words
A composition for use in an electrode as claimed in claim 2, comprising calcium di(p-n-octylphenyl)phosphate dissolved in a di(alkyl)arylphosphonate.
Claim 18
Dependent Claim
12 words
A composition as claimed in claim 15, wherein the di(alkyl)arylphosphonate is di(n-octyl)phenylphosphonate.
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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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |