US2480474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing aluminum
Assignee: Reynolds Metals Co
•
Filing: 1945-12-14
•
Granted: 1949-08-30
•
Expires: 1965-12-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:12
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189801697A
Cited
US1070454A
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US1297946A
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US1267141A
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US1545383A
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US1545384A
Cited
US1851817A
Cited
US1833806A
Cited
US2312452A
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US2399254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |