US2829090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass electrode for measuring sodium ion
Assignee: COMMONWEALTH MENTAL HEALTH RESEARCH FOUNDATION
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Filing: 1957-02-20
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Granted: 1958-04-01
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Expires: 1977-02-20
Abstract
No abstract record available.
Inventors
- 👤 Eisenman George
- 👤 Donald O Rudin
- 👤 James U Casby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:15
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
A PROCESS OF SELECTIVELY MEASURING SODIUM ION ACTIVITY IN AN IONIC MIXTURE INCLUDING THE POTASSIUM AND HYDROGEN IONS COMPRISING PROVIDING AN ELECTRODE MADE OF A SODA-ALUMINA-SILICA GLASS IN WHICH THE RATIO OF THE MOLE PERCENT OF AL2O3 TO NA2O IS AT LEAST SUBSTANTIALLY 1:1, SUBJECTING THE MIXTURE TO SAID GLASS ELECTRODE AND TO A STANDARD REFERENCE HALF-CELL AND OPERATIVELY CONNECTING THE GLASS ELECTRODE HALF-CELL AND OPERATIVELY CONNECTTEMPEDANCE ELECTROMETRIC AMPLIFIER.
Claim 2
Dependent Claim
69 words
A PROCESS OF SELECTIVELY MEASURING SODIUM ION ACTIVITY IN AN IONIC MIXTURE INCLUDING THE POTASSIUM AND HYDROGEN IONS COMPRISING PROVIDING AN ELECTRODE MADE OF A SODA-ALUMINA-SILICA GLASS IN WHICH THE RATIO OF THE MOLE PERCENT OF AL2O3 TO NA2O IS AT LEAST SUBSTANTIALLY 1:1, SUBJECTING THE MIXTURE TO SAID GLASS ELECTRODE AND TO A STANDARD REFERENCE HALF-CELL AND OPERATIVELY CONNECTING THE GLASS ELECTRODE HALF-CELL AND OPERATIVELY CONNECTTEMPEDANCE ELECTROMETRIC AMPLIFIER.
Claim 3
Dependent Claim
43 words
A GLASS ELECTRODE FOR SELECTIVELY MEASURING SODIUM ION ACTIVITY IN IONIC MIXTURES INCLUDING THE POTASSIUM AND HYDROGEN IONS, SAID ELECTRODE HAVING A MEMBRANE OF SODA-ALUMINA-SILICA COMPOSITION IN WHICH THE RATIO OF THE MOLE PERCENT OF AL2O3 TO NA2O IS AT LEAST SUBSTANTIALLY 1:1.
Claim 4
Dependent Claim
43 words
A GLASS ELECTRODE FOR SELECTIVELY MEASURING SODIUM ION ACTIVITY IN IONIC MIXTURES INCLUDING THE POTASSIUM AND HYDROGEN IONS, SAID ELECTRODE HAVING A MEMBRANE OF SODA-ALUMINA-SILICA COMPOSITION IN WHICH THE RATIO OF THE MOLE PERCENT OF AL2O3 TO NA2O IS AT LEAST SUBSTANTIALLY 1:1.
References Cited (Backward Citations)
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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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |