US3395221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gel froming aluminum hydroxide
Assignee: Warner Lambert Co LLC
•
Filing: 1965-04-15
•
Granted: 1968-07-30
•
Expires: 1985-04-15
Abstract
No abstract record available.
Inventors
- 👤 Herbert T Snyder
- 👤 Arthur J Sikora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:42
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/06; A61K33/08; C; C01; C01F; C01F7/00; C01F7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD FOR THE PREPARATION OF GEL FORMING ALUMINUM HYDROXIDE WHICH COMPRISES, (A) REACTING AN ALUMINUM SALT WITH AN ALKALI METAL HYDROXIDE IN AN AQUEOUS REACTION MEDIUM HAVING A PH MAINTAINED AT ABOUT 8.2 TO ABOUT 8.9, A REACTION TEMPERATURE OF FROM ABOUT 45*C. TO ABOUT 60*C., AND A REACTION TIME OF FROM ABOUT 5 TO ABOUT 15 MINUTES; (B) FILTERING THE REACTION SLURRY PREPARED BY STEP (A) AFTER DILUTING THE SLURRY WITH FROM ABOUT 5 PARTS TO ABOUT 10 PARTS BY WEIGHT OF WATER PER PART BY WEIGHT OF SLURRY; AND (C) RECOVERING GEL FORMING ALUMINUM HYDROXIDE.
Claim 2
Independent Claim
98 words
A METHOD FOR THE PREPARATION OF GEL FORMING ALUMINUM HYDROXIDE WHICH COMPRISES, (A) REACTING AN ALUMINUM SALT WITH AN ALKALI METAL HYDROXIDE IN AN AQUEOUS REACTION MEDIUM HAVING A PH MAINTAINED AT ABOUT 8.2 TO ABOUT 8.9, A REACTION TEMPERATURE OF FROM ABOUT 45*C. TO ABOUT 60*C., AND A REACTION TIME OF FROM ABOUT 5 TO ABOUT 15 MINUTES; (B) FILTERING THE REACTION SLURRY PREPARED BY STEP (A) AFTER DILUTING THE SLURRY WITH FROM ABOUT 5 PARTS TO ABOUT 10 PARTS BY WEIGHT OF WATER PER PART BY WEIGHT OF SLURRY; AND (C) RECOVERING GEL FORMING ALUMINUM HYDROXIDE.
References Cited (Backward Citations)
US2999790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |