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Patent US2920676A successfully refreshed from Google Patents.
US2920676A
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US
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Stretch wrap forming machine
Assignee: Douglas Aircraft Co Inc
•
Filing: 1955-07-20
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Granted: 1960-01-12
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Expires: 1975-07-20
Abstract
No abstract record available.
Inventors
- 👤 Charles R Turnblade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:30
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/02
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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |