System for determining the hydrogen ion concentration of flowing liquids
Abstract
Abstract An enclosed electrode assembly for determining the pH of minute samples of continuously or intermittently flowing liquids. The assembly includes a reference electrode comprised of an elongated tube and a half-cell element positioned within the tube and immersed within a continuously flowing electrolyte. Also included is an indicating electrode comprising an ion sensitive capillary tube, an electrolyte surrounding the capillary and a half-cell element immersed in the electrolyte. The capillary tube, containing a sample to be tested, connects to the elongated tube at an angle and forms a juncture for establishing direct electrical continuity between the flowing sample, the reference electrode, the indicating electrode and an external measuring circuit for determining pH.
Inventors
- 👤 Marion J Stansell
- 👤 Chandler S Cheek
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |