US2398601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft control
Assignee: A EARLE WEATHERWAX
•
Filing: 1943-12-02
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Granted: 1946-04-16
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Expires: 1963-12-02
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Seifert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:47
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/02; B64C13/04; B64C13/042; B64C13/0423; Y; Y10; Y10S; Y10S414/00; Y10S414/122; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20474
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-15 | 1949-10-15 | 1950-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-15 | 1953-10-15 | 1954-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-15 | 1957-10-15 | 1958-04-16 | $7700.00 | Window Closed / Lapsed |