US3586613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic reduction of oxides using plasma electrodes
Assignee: Dow Chemical Co
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Filing: 1967-03-31
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Granted: 1971-06-22
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Expires: 1987-03-31
Abstract
Abstract A METHOD OF REDUCING OXIDES OF METALS AND METALLOIDS USING A GASEOUS PLASMA WHICH FORMS AN IONIZED GAS ANODE AS PART OF THE ELECTROLYTIC CELL. THE INVENTION IS APPLICABLE FOR THE PRODUCTION OF METALS AND METALLOIDS WHICH FORM OXIDES HAVING A MELTING POINT LOWER THAN THE BOILING POINT OF THE METAL OR METALLOID.
Inventors
- 👤 Russell L Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:58
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; C; C22; C22B; C22B4/00; C22B4/005; C25; C25C; C25C3/00; C25C7/00; C25C7/005
Claims Analysis
Total Claims: 0
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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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |