US3706649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical electrode
Assignee: Beckman Coulter Inc
•
Filing: 1970-06-29
•
Granted: 1972-12-19
•
Expires: 1990-06-29
Abstract
Abstract AN ELECTROCHEMICAL ELECTRODE FOR MEASURING THE ION CONCENTRATION OR ACTIVITY OF SOLUTIONS. THE ION SENSITIVE BARRIER OF THE ELECTRODE CONTAINS A MACROCYCLIC COMPOUND, MINERAL OIL, AND A SUFFICIENT AMOUNT OF A COMPOUND LIPID TO RENDER THE BARRIER SUBSTANTIALLY SOLID. PREFERABLY, AN AROMATIC COMPONENT IS INCLUDED IN THE BARRIER TO PROVIDE LONG TERM STABILITY OF THE BARRIER. THE MACROCYCLIC COMPOUND IS PREFERABLY VALINOMYCIN WHEN THE ELECTRODE IS TO BE UTILIZED FOR SELECTIVELY MEASURING THE POTASSIUM ION ACTIVITY OF SOLUTIONS, AND IS PREFERABLY NONACTIN WHEN THE ELECTRODE IS TO BE UTILIZED FOR SELECTIVELY MEASURING THE AMMONIUM ION ACTIVITY OF SOLUTIONS.
Inventors
- 👤 Richard E Cosgrove
- 👤 Irwin H Krull
- 👤 Charles A Mask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335; G01N2410/00; G01N2410/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |