Device for determining the activity of oxygen in molten metals
Abstract
Abstract AN EXPENDABLE ELECTROCHEMICAL CELL FOR IMMERSION INTO MOLTEN METAL TO DETERMINE THE ACTIVITY OF OXYGEN THEREIN COMPRISE A TUBE OF SOLID ELECTROLYTE WHICH IS IMMERSED INTO A BATH OF MOLTEN METAL AND CONFINES A REFERENCE SUBSTANCE CONTAINING OXYGEN WHOSE PARTIAL PRESSURE AT VARIOUS TEMPERATURES IS KNOWN, AND AN ELECTRODE WHICH IS EXPOSED TO MOLTEN METAL UPON IMMERSION OF THE CELL. A THERMOCOUPLE IN THE TUBE IS SURROUNDED BY THE REFERENCE SUBSTANCE AND ITS BRANCHES ARE CONNECTED TO TERMINALS PROVIDED ON A HEAT-RESISTANT INSULATING SUPPORT FOR THE TUBE AND ELECTRODE. THE ELECTROMOTIVE FORCE IS MEASURED ACROSS ONE OF THE TERMINALS AND THE ELECTRODE, AND THE TEMPERATURE OF MOLTEN METAL IS MEASURED ACROSS THE TERMINALS.
Inventors
- 👤 Michel Olette
- 👤 Christian Gatellier
Bibliographic Details
Claims Analysis
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |