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Patent US2639757A successfully refreshed from Google Patents.
US2639757A
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US
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Apparatus for forming metal articles
Assignee: Individual
•
Filing: 1946-03-25
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Granted: 1953-05-26
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Expires: 1966-03-25
Abstract
No abstract record available.
Inventors
- 👤 Hiram R Cheek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:58
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44; B21D51/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US766227A
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US931043A
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US1010740A
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US1771534A
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US2005215A
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US2215731A
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US2215845A
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US2145587A
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US2372011A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |