Patent US2907634A successfully refreshed from Google Patents.
US2907634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of colloidally soluble aluminum hydroxide
Assignee: BASF SE
•
Filing: 1956-09-11
•
Granted: 1959-10-06
•
Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Ziese Walter
- 👤 Chorbacher Wilhelm
- 👤 Steinhofer Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:40
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
A METHOD OF PREPARING ALUMINUM HYDROXIDE WHICH IS COLLOIDALLY SOLUBLE IN WATER WHICH COMPRISES SUBJECTING PRECIPITATED ALUMINUM HYDROXIDE CONTAINING FROM ABOUT 0.1 TO ABOUT 5.0% OF ANIONS OF STRONG INORGANIC ACIDS TO THE ACTION OF STEAM UNDER A PRESSURE OF FROM ABOUT 5 TO ABOUT 12 EXCESS ATMOSPHERES FOR FROM ABOUT ONE TO ABOUT TEN HOURS.
References Cited (Backward Citations)
US1632829A
Cited
US1868499A
Cited
US2378155A
Cited
US2377547A
Cited
US2390272A
Cited
US2657115A
Cited
US2667404A
Cited
US2776188A
Cited
US2773842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |