US2803596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-cleaning of vanadium
Assignee: Union Carbide Corp
•
Filing: 1954-03-16
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Granted: 1957-08-20
•
Expires: 1974-03-16
Abstract
No abstract record available.
Inventors
- 👤 Charles M Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:46
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF ELECTRICALLY REMOVING THE CONTAMIUATED, HIGH OXYGEN-CONTAINING SURFACE LAYER OF VANADIUM METAL WHICH COMPRISES MAKING THE METAL TO BE TREATED THE ANODE OF AN ELECTROLYTIC CELL HAVING AN AQUEOUS ELECTROLYTE CONSISTING OF IONS SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL CARBONATES AND ALKALI METAL BICARBONATES, APPLYING A DIRECT CURRENT OF PRE-DETERMINED VOLTAGE AND CONTINUING ELECTROLYTIC ACTION UNTIL THE BRITTLE LAYER OF THE VANADIUM METAL HAS BEEN REMOVED.
Claim 2
Independent Claim
71 words
THE METHOD OF ELECTRICALLY REMOVING THE CONTAMIUATED, HIGH OXYGEN-CONTAINING SURFACE LAYER OF VANADIUM METAL WHICH COMPRISES MAKING THE METAL TO BE TREATED THE ANODE OF AN ELECTROLYTIC CELL HAVING AN AQUEOUS ELECTROLYTE CONSISTING OF IONS SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL CARBONATES AND ALKALI METAL BICARBONATES, APPLYING A DIRECT CURRENT OF PRE-DETERMINED VOLTAGE AND CONTINUING ELECTROLYTIC ACTION UNTIL THE BRITTLE LAYER OF THE VANADIUM METAL HAS BEEN REMOVED.
References Cited (Backward Citations)
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US1731269A
Cited
US1663564A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |