US2416508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of iron from aluminum sulphate solutions
Assignee: Wyeth Holdings LLC
•
Filing: 1944-05-13
•
Granted: 1947-02-25
•
Expires: 1964-05-13
Abstract
No abstract record available.
Inventors
- 👤 Robert B Barnes
- 👤 Garnet P Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:03
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/746; C01F7/748
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1252648A
Cited
US1421804A
Cited
US1778987A
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US2019554A
Cited
US2146439A
Cited
US2169540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-24 | 1950-08-26 | 1951-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-24 | 1954-08-26 | 1955-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-24 | 1958-08-26 | 1959-02-25 | $7700.00 | Window Closed / Lapsed |