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US3773918A
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Stable,reactive aluminum hydroxide dried gel and method of making same
Assignee: CHATTEM CHEM DIVISION
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Filing: 1971-09-24
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Granted: 1973-11-20
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Expires: 1991-09-24
Abstract
Abstract AN IMPROVED, HIGHLY REACTIVE ALUMINUM HYDROGEL PARTICULARLY SUITABLE FOR USE IN ANTACID COMPOSITIONS AND CHARACTERIZED BY STABILITY AND RETAINED REACTIVITY UPON PROLONGED PERIODS OF STORAGE. THE HYDROGEL IS PRODUCED BY REACTING ALUMINUM CHLORIDE WITH A SOLUTION CONTAINING ALKALI METAL CARBONATE IONS AT A TEMPERATURE OF 0 TO 5*C., RESULTING IN THE PRODUCTION OF A HYDROGEL CONTAINING FROM 0.5 TO 3% BY WEIGHT ALUMINUM OXIDE (AL2O3). THE RESULTING HYDROGEL IS RAPIDLY DRIED TO PRODUCE A GEL HAVING ENHANCED STABILITY UPON STANDING, AND IMPROVED REACTIVITY.
Inventors
- 👤 S Beekman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:35
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; A; A61; A61K; A61K33/00; A61K33/06; A61K33/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |