Patent US3082981A successfully refreshed from Google Patents.
US3082981A
Expired / Lapsed
US
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Airplane construction embodying reduced aerodynamic drag and isolated fuel compartments
Assignee: Individual
•
Filing: 1961-08-25
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Granted: 1963-03-26
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Expires: 1981-08-25
Abstract
No abstract record available.
Inventors
- 👤 Gruen Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:42
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/26; B64D; B64D37/00; B64D37/02; B64D37/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1355624A
Cited
GB387719A
Cited
US2090038A
Cited
US2689698A
Cited
US2841344A
Cited
DE1045810B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |