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Patent US2448993A successfully refreshed from Google Patents.
US2448993A
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US
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Grain refining magnesium alloys
Assignee: Reconstruction Finance Corp
•
Filing: 1944-08-26
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Granted: 1948-09-07
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Expires: 1964-08-26
Abstract
No abstract record available.
Inventors
- 👤 Charles H Mahoney
- 👤 Harley C Lee
- 👤 Allan L Tarr
- 👤 Grand Pierre E Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:12
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2101919A
Cited
US2101904A
Cited
US2126786A
Cited
US2151779A
Cited
GB517994A
Cited
US2262220A
Cited
US2380863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |