Patent US2372516A successfully refreshed from Google Patents.
US2372516A
Expired / Lapsed
US
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Machine for forming material
Assignee: Douglas Aircraft Co Inc
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Filing: 1942-09-07
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Granted: 1945-03-27
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Expires: 1962-09-07
Abstract
No abstract record available.
Inventors
- 👤 George D Rechton
- 👤 Delbert J Ward
- 👤 Jack H Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/02; B21D22/04
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) | 1948-03-26 | 1948-09-25 | 1949-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-03-26 | 1952-09-25 | 1953-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-03-26 | 1956-09-25 | 1957-03-27 | $7700.00 | Window Closed / Lapsed |