Patent US3723281A successfully refreshed from Google Patents.
US3723281A
Expired / Lapsed
US
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Bicarbonate ion sensitive electrode
Assignee: Corning Glass Works
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Filing: 1972-01-31
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Granted: 1973-03-27
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Expires: 1992-01-31
Abstract
Abstract ELECTRODE FOR MEASURING THE CONCENTRATION OF BICARBONATE IONS IN THE PRESENCE OF CHLORIDE IONS IN AN AQUEOUS SOLUTION. THE ION SENSING PORTION OF THE ELECTRODE IS AN ORGANIC SOLUTION CONSISTING OF A HIGH MOLECULAR WEIGHT QUATERNARY AMMONIUM SALT DISSLOVED PREFERABLY IN A DUAL SOLVENT SYSTEM CONSISTING OF A TRIFLUOROACETYL-P-ALKYLBENZENE AND AN ALCOHOL OF LOW WATER SOLUBILITY. THE PREFERRED ELECTRODE HAS A SELECTIVITY FOR HCO3-OVER C1-OF BETWEEN ABOUT 15 TO 1 AND 40 TO 1.
Inventors
- 👤 W Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:26
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |