US2440378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of sodium aluminate solutions
Assignee: Alcoa Corp
•
Filing: 1946-09-13
•
Granted: 1948-04-27
•
Expires: 1966-09-13
Abstract
No abstract record available.
Inventors
- 👤 James W Newsome
- 👤 Harold W Heiser
- 👤 James R Wall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:34
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/46; C01F7/47; C01F7/473; C01F7/04; C01F7/06; C01F7/0606; C01F7/14; C01F7/144; C01F7/145; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US955952A
Cited
US1665625A
Cited
DE463953C
Cited
US1653631A
Cited
US1630972A
Cited
US1778100A
Cited
GB270958A
Cited
US1922330A
Cited
US2175541A
Cited
US2190727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |