Patent US2767767A successfully refreshed from Google Patents.
US2767767A
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Method and apparatus for straightening integrally reinforced metal extrusions
Assignee: LONGREN AIRCRAFT Co
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Filing: 1952-06-06
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Granted: 1956-10-23
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Expires: 1972-06-06
Abstract
No abstract record available.
Inventors
- 👤 Albin K Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:26
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/02; B21D3/05; B21D1/00; Y; Y10; Y10S; Y10S29/00; Y10S29/046; Y10S72/00; Y10S72/71
Claims Analysis
Total Claims: 0
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US2692421A
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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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |