US2447386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining aluminum hydroxide from silicates
Assignee: Individual
•
Filing: 1943-10-25
•
Granted: 1948-08-17
•
Expires: 1963-10-25
Abstract
No abstract record available.
Inventors
- 👤 Antonoff George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:20
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US683000A
Cited
GB190806449A
Cited
GB191506727A
Cited
US1290269A
Cited
FR496117A
Cited
US1382808A
Cited
US1359002A
Cited
US1661618A
Cited
US1559179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |