US3438598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendable wing flap arrangement for airplanes
Assignee: Entwicklungsring Sued GmbH
•
Filing: 1966-10-13
•
Granted: 1969-04-15
•
Expires: 1986-10-13
Abstract
No abstract record available.
Inventors
- 👤 Karl Vinzenz Tammel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:30
CPC Classifications
B; B64; B64C; B64C9/00; B64C9/14; B64C9/16; B64C9/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2202430A
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US2226811A
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US2502315A
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US2526929A
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US2614774A
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US2624532A
Cited
US2661166A
Cited
US2688455A
Cited
US2836380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |