US2943065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing alumina compositions
Assignee: ChampionX LLC
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Filing: 1955-12-08
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Granted: 1960-06-28
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Expires: 1975-12-08
Abstract
No abstract record available.
Inventors
- 👤 David G Braithwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:20
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A METHOD FOR PREPARING A COMPOSITION CONTAINING A CONTROLLED AMOUNT OF GELATINOUS ALUMINUM TRIHYDRATE WHICH COMPRISES ADMIXING, IN AQUEOUS SOLUTION, AN ALKALI METAL BICARBONATE AND A SOLUBLE ALUMINATE FROM THE GROUP CONSISTING OF SODIUM ALUMINATE AND CALCIUM ALUMINATE, THE WEIGHT RATIO OF SAID BICARBONATE TO SAID ALUMINATE SALTS, CALCULATED AS A12O3, USED IN THE PREPARATION OF SAID COMPOSITION BEING WITHIN THE RANGE FROM 0.1 TO 1.5 AND THE REACTION TIME BEING SUFFICIENT TO PRODUCE A PRODUCT AFTER DRYING IN WHICH THE AMOUNT OF ALUMINUM TRIHYDRATE IS WITHIN THE RANGE OF 10% TO 60% BY WEIGHT OF SAID PRODUCT, REDUCING THE PH OF THE RESULTANT MIXTURE TO AN ACIDIC PH BY ADDING TO SAID MIXTURE AN ACIDIC SUBSTANCE FROM THE GROUP CONSISTING OF SULFURIC ACID, HYDROCHLORIC ACID, NITRIC ACID AND ALUMINUM SULFATE, THEREAFTER RAISING THE PH OF THE RESULTANT MIXTURE TO AN ALKALINE PH BY ADDING SODIUM ALUMINATE TO SAID MIXTURE, AND SEPARATING THE RESULTANT SOLIDS CONTAINING ALUMINUM TRIHYDRATE FROM SAID MIXTURE.
Claim 2
Independent Claim
161 words
A METHOD FOR PREPARING A COMPOSITION CONTAINING A CONTROLLED AMOUNT OF GELATINOUS ALUMINUM TRIHYDRATE WHICH COMPRISES ADMIXING, IN AQUEOUS SOLUTION, AN ALKALI METAL BICARBONATE AND A SOLUBLE ALUMINATE FROM THE GROUP CONSISTING OF SODIUM ALUMINATE AND CALCIUM ALUMINATE, THE WEIGHT RATIO OF SAID BICARBONATE TO SAID ALUMINATE SALTS, CALCULATED AS A12O3, USED IN THE PREPARATION OF SAID COMPOSITION BEING WITHIN THE RANGE FROM 0.1 TO 1.5 AND THE REACTION TIME BEING SUFFICIENT TO PRODUCE A PRODUCT AFTER DRYING IN WHICH THE AMOUNT OF ALUMINUM TRIHYDRATE IS WITHIN THE RANGE OF 10% TO 60% BY WEIGHT OF SAID PRODUCT, REDUCING THE PH OF THE RESULTANT MIXTURE TO AN ACIDIC PH BY ADDING TO SAID MIXTURE AN ACIDIC SUBSTANCE FROM THE GROUP CONSISTING OF SULFURIC ACID, HYDROCHLORIC ACID, NITRIC ACID AND ALUMINUM SULFATE, THEREAFTER RAISING THE PH OF THE RESULTANT MIXTURE TO AN ALKALINE PH BY ADDING SODIUM ALUMINATE TO SAID MIXTURE, AND SEPARATING THE RESULTANT SOLIDS CONTAINING ALUMINUM TRIHYDRATE FROM SAID MIXTURE.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |