US3713995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining activity of oxygen in liquid and solid metals and alloys
Assignee: Individual
•
Filing: 1969-12-12
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Granted: 1973-01-30
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Expires: 1989-12-12
Abstract
Abstract AN APPARATUS FOR DETERMING THE ACTIVITY OF OXYGEN IN A LIQUID AND SOLID METAL AND ALLOYS WHICH INCLUDES A CONTROL FOR THE PARTIAL PRESSURE OF OXYGEN IN A REFERENCE ELECTRODE, WHICH LATTER ELECTRODE IS ONE OF A PAIR OF ELECTRODES OF AN OXYGEN CONCENTRATION CELL. WHEN THE ELECTROMOTIVE FORCE ACROSS THE PAIR OF ELECTRODES OF THE CELL VARIES FROM A ZERO VALUE, THE CONTROL ADJUSTS THE PARTIAL PRESSURE OF OXYGEN IN THE REFERENCE ELECTRODE TO A VALUE CORRESPONDING TO THE OXYGEN ACTIVITY OF THE METAL OR ALLOY BEING TESTED, THIS METAL OR ALLOY FORMING THE OTHER OF THE PAIR OF ELECTRODES OF THE OXYGEN CONCENTRATION CELL.
Inventors
- 👤 P Cherkasov
- 👤 A Samarin
- 👤 E Kuznetsov
- 👤 V Averin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:55
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/4065; G01N7/00; G01N7/14
Claims Analysis
Total Claims: 0
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |