US3092453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of low-soda alumina
Assignee: Alcoa Corp
•
Filing: 1959-08-18
•
Granted: 1963-06-04
•
Expires: 1979-08-18
Abstract
No abstract record available.
Inventors
- 👤 Walter H Gitzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:27
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/46; C01P; C01P2004/00; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD OF REMOVING SODA FROM AN ALUMINUM COM: POUND CONTAINING SODA AND SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND ALUMINA HYDRATE, COMPRISING ADMIXING WITH SAID ALUMINUM COMPOUND BORIC OXIDE AND A FLUORIDE MINERALIZER, HEATING SAID ADMIXTURE AT A TEMPERATURE ABOVE 900*C. BUT BELOW THE EFFECTIVE VOLATILIZATION TEMPERATURE OF SODIUM BORATE TO SOLUBILIZE THE SODIUM OXIDE CONTAINED IN SAID COMPOUND, AND SUBSEQUENTLY LEACHING THE HEATED ADMIXTURE WITH A SOLVENT FOR SODIUM BORATE.
Claim 2
Independent Claim
73 words
A METHOD OF REMOVING SODA FROM AN ALUMINUM COM: POUND CONTAINING SODA AND SELECTED FROM THE GROUP CONSISTING OF ALUMINA AND ALUMINA HYDRATE, COMPRISING ADMIXING WITH SAID ALUMINUM COMPOUND BORIC OXIDE AND A FLUORIDE MINERALIZER, HEATING SAID ADMIXTURE AT A TEMPERATURE ABOVE 900*C. BUT BELOW THE EFFECTIVE VOLATILIZATION TEMPERATURE OF SODIUM BORATE TO SOLUBILIZE THE SODIUM OXIDE CONTAINED IN SAID COMPOUND, AND SUBSEQUENTLY LEACHING THE HEATED ADMIXTURE WITH A SOLVENT FOR SODIUM BORATE.
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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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |