US2247979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for hot shaping magnesium alloy plates
Assignee: LEIPZIGER LEICHTMETALL WERK RA
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Filing: 1938-07-05
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Granted: 1941-07-01
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Expires: 1958-07-05
Abstract
No abstract record available.
Inventors
- 👤 Tannenberg Walter Meinel Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:33
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; B; B21; B21D; B21D5/00; B21D5/04; B21D5/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-06-30 | 1944-12-30 | 1945-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-30 | 1948-12-30 | 1949-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-30 | 1952-12-30 | 1953-07-01 | $7700.00 | Window Closed / Lapsed |