US2798845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying alkali aluminate lye
Assignee: Societe Anonyme pour lIndustrie de lAluminium SA
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Filing: 1956-06-11
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Granted: 1957-07-09
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Expires: 1976-06-11
Abstract
No abstract record available.
Inventors
- 👤 Breteque Pierre De La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:56
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/22; C01; C01F; C01F7/00; C01F7/02; C01F7/46; C01F7/47; C01G; C01G17/00; C01G31/00; C22; C22B; C22B58/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
A PROCESS OF PURIFYING A SOLUTION OF AN ALKALI ALUMINATE SOLUTION WITH SIMULTANEOUS RECOVERY OF METALLICGALLIUM AND VANADIUM COMPOUNDS COMPRISING ELECTROLYZING THE SAID ALKALI ALUMINATE SOLUTION BY THE ACTION OF A CATHODE OF LIQUID MERCURY WHILE STIRRING SAID MERCURY AND OF ANODE MEANS MADE FROM A METAL WHICH IS INSOLUBLE UNDER THE CONDITIONS OF THE ELECTROLYSIS, THE TERMINAL VOLTAGE BEING AT LEAST 3 VOLTS, THE CATHODIC POTENTIAL BEING AT LEAST 1.6 VOLTS AND THE CURRENT DENSITY AT THE CATHODE BEING AT LEAST 0.35 AMPERE PER SQUARE DECIMETER.
References Cited (Backward Citations)
US1200025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |