US2437684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft having high-lift wing channels
Assignee: Individual
•
Filing: 1940-08-31
•
Granted: 1948-03-16
•
Expires: 1960-08-31
Abstract
No abstract record available.
Inventors
- 👤 Willard R Custer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:51
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1153248A
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US1550149A
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US1704449A
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US1824250A
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US1868832A
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US1794923A
Cited
FR717575A
Cited
US2194596A
Cited
FR812893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |