US3512926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purification of sodium aluminate liquors
Assignee: Pechiney SA
•
Filing: 1967-05-19
•
Granted: 1970-05-19
•
Expires: 1987-05-19
Abstract
No abstract record available.
Inventors
- 👤 Henri Antoine Mercier
- 👤 Joseph Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:34
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/46; C01F7/47; C01F7/473
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US328478A
Cited
US1919308A
Cited
US2375343A
Cited
US2591436A
Cited
US2885261A
Cited
US3301695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |