Patent US2440378A successfully refreshed from Google Patents.
US2440378A
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Treatment of sodium aluminate solutions
Assignee: Alcoa Corp
•
Filing: 1946-09-13
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Granted: 1948-04-27
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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 22:44
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
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References Cited (Backward Citations)
US955952A
Cited
US1665625A
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DE463953C
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US1653631A
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US1630972A
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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 |