US2672306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flywheel type catapult launching means
Assignee: All American Engineering Co
•
Filing: 1951-01-05
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Granted: 1954-03-16
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Expires: 1971-01-05
Abstract
No abstract record available.
Inventors
- 👤 Donald B Doolittle
- 👤 Ii Raymond B Janney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:50
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/04; B64F1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US371599A
Cited
US1620785A
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US1892357A
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FR817237A
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US2217946A
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US2240947A
Cited
US2375449A
Cited
US2483655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |