US2683494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller
Assignee: Individual
•
Filing: 1949-12-24
•
Granted: 1954-07-13
•
Expires: 1969-12-24
Abstract
No abstract record available.
Inventors
- 👤 Chilton Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:54
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/04; B64C11/06; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2440115A
Cited
FR595288A
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US614094A
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US1384672A
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FR521487A
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US1638695A
Cited
US2083993A
Cited
US2289400A
Cited
US2298021A
Cited
US2385070A
Cited
US2457325A
Cited
US2438542A
Cited
US2478252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |