US3034747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft with discoid sustaining airfoil
Assignee: Individual
•
Filing: 1957-01-08
•
Granted: 1962-05-15
•
Expires: 1977-01-08
Abstract
No abstract record available.
Inventors
- 👤 Constantin P Lent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:08
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/06; B64C39/062; B64C39/064
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190816153A
Cited
GB129142A
Cited
FR691627A
Cited
US1846125A
Cited
US1911041A
Cited
GB406971A
Cited
US2008464A
Cited
US2399218A
Cited
US2468787A
Cited
US2547266A
Cited
US2730311A
Cited
US2876964A
Cited
US2726829A
Cited
FR1138029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |