US3563875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coulometric titration
Assignee: Individual
•
Filing: 1968-04-02
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Granted: 1971-02-16
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Expires: 1988-04-02
Abstract
Abstract APPARATUS AND METHOD FOR SEMI-AUTOMATIC COULOMETRIC TITRATION BY CONTINUOUSLY MONITORING A POTENTIAL OF A SENSOR ELECTRODE IN AN ELECTROLYTIC SOLUTION INTO WHICH A TITRANT WHEN THE POTENTIAL REACHES A PRESELECTED VALUE AND PREVENTING INCOMPLETE ADDITION OF TITRANT BY SUPERIMPOSING AT REGULAR INTERVALS A NEGATIVE WAVE PULSE ONTO THE POTENTIAL BEING MONITORED.
Inventors
- 👤 Dale M Coulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:52
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/44; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/115831; Y10T436/116664; Y10T436/19; Y10T436/193333
Claims Analysis
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |