US2611355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catapult for launching model airplanes
Assignee: Individual
•
Filing: 1949-07-29
•
Granted: 1952-09-23
•
Expires: 1969-07-29
Abstract
No abstract record available.
Inventors
- 👤 Norman D Ashwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:51
CPC Classifications
A; A63; A63H; A63H27/00; A63H27/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191209403A
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US1832740A
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US1846157A
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US2144805A
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US2070721A
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US2204546A
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FR835594A
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US2330733A
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US2406131A
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US2426437A
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US2425886A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |