Patent US2242627A successfully refreshed from Google Patents.
US2773538A
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US
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Convolution forming machine
Assignee: Solar Aircraft Co
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Filing: 1950-11-10
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Granted: 1956-12-11
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Expires: 1970-11-10
Abstract
No abstract record available.
Inventors
- 👤 Mers Francis F De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21D15/10
Claims Analysis
Total Claims: 0
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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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |