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US3013749A
Expired / Lapsed
US
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Aircraft structure
Assignee: Individual
•
Filing: 1959-09-25
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Granted: 1961-12-19
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Expires: 1979-09-25
Abstract
No abstract record available.
Inventors
- 👤 Charles L Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:01
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/22; B64C27/26; B64D; B64D35/00; B64D35/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1160021A
Cited
US1928560A
Cited
GB493173A
Cited
US2217883A
Cited
US2581320A
Cited
US2699299A
Cited
US2740595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |