US3753887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal specific measuring electrode
Assignee: T-HYDRONAUTICS Inc A CORP OF TX
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Filing: 1970-05-25
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Granted: 1973-08-21
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Expires: 1990-05-25
Abstract
Abstract AN ELECTRODE FOR MEASURING THE ACTIVITY OF ALKALI METAL IONS IN SOLUTIONS, A SOLID MEMBRANE COMPRISING A POLYMERIC SUPPORT MATERIAL, AN UNCHARGED ION CARRIER AND A SOLVENT FOR THE ION CARRIER IN WHICH THE SOLVENT MAY ACT AS A PLASTICIZER FOR THE SUPPORT AND IN WHICH THE SUPPORT AND THE SOLVENT TOGETHER PROVIDE A NEGGATIVE CHARGE TO THE MEMBRANE CORRESPONDING TO AN ANION CONCENTRATION OF 10-6 TO 10-3 MILLEQUIVALENTS PER GRAM OF SOLVENT.
Inventors
- 👤 O Kedem
- 👤 E Loebel
- 👤 M Furmansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:16
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |