US2926069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal aluminates
Assignee: Diamond Shamrock Corp
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Filing: 1956-06-27
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Granted: 1960-02-23
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Expires: 1976-06-27
Abstract
No abstract record available.
Inventors
- 👤 Tom S Perrin
- 👤 Robert G Banner
- 👤 Robert C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:22
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/06; C01F7/062; C01F7/0633
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR PRODUCING SODIUM ALUMINATE FROM AN ALUMINA-CONTAINING MATERIAL CONTAMINATED WITH SILICA, VANADIUM, AND HEXAVALENT CHROMIUM IMPURITIES WHICH COMPRISES ADDING CONCENTRATED SODIUM HYDROXIDE, LIME AND A FERROUS SALT TO SAID MATERIAL, SAID LIME BEING ADDED IN A WEIGHT RATIO OF AT LEAST 20:1 FOR SILICA AND UP TO 80:1 FOR VANADIUM, HEATING SAID MIXTURE AT AN ELEVATED PRESSURE AND RECOVERING THEREFROM A SODIUM ALUMINATE SUBSTANTIALLY FREE OF SILICA, VANADIUM, AND HEXAVALENT CHROMIUM IMPURITIES.
Claim 2
Dependent Claim
74 words
A PROCESS FOR PRODUCING SODIUM ALUMINATE FROM AN ALUMINA-CONTAINING MATERIAL CONTAMINATED WITH SILICA, VANADIUM, AND HEXAVALENT CHROMIUM IMPURITIES WHICH COMPRISES ADDING CONCENTRATED SODIUM HYDROXIDE, LIME AND A FERROUS SALT TO SAID MATERIAL, SAID LIME BEING ADDED IN A WEIGHT RATIO OF AT LEAST 20:1 FOR SILICA AND UP TO 80:1 FOR VANADIUM, HEATING SAID MIXTURE AT AN ELEVATED PRESSURE AND RECOVERING THEREFROM A SODIUM ALUMINATE SUBSTANTIALLY FREE OF SILICA, VANADIUM, AND HEXAVALENT CHROMIUM IMPURITIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |