US2884633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical take off and landing apparatus for use with aircraft
Assignee: Individual
•
Filing: 1955-07-11
•
Granted: 1959-04-28
•
Expires: 1975-07-11
Abstract
No abstract record available.
Inventors
- 👤 Stahmer Bernhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:53
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US220473A
Cited
US1195624A
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FR340357A
Cited
US1820467A
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US1783458A
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US2549313A
Cited
US2633311A
Cited
US2613752A
Cited
FR1068404A
Cited
US2717131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |