US2930544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft having vertical lifting jet engines
Assignee: Individual
•
Filing: 1955-11-02
•
Granted: 1960-03-29
•
Expires: 1975-11-02
Abstract
No abstract record available.
Inventors
- 👤 Alun R Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:28
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE506664A
Cited
US2620624A
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US2734699A
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US1921043A
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FR903462A
Cited
GB588096A
Cited
US2463352A
Cited
US2502045A
Cited
US2567392A
Cited
US2610005A
Cited
US2777649A
Cited
FR1068404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |