Patent US2470602A successfully refreshed from Google Patents.
US2470602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tandem wing aircraft
Assignee: Blackburn Aircraft Ltd
•
Filing: 1945-10-16
•
Granted: 1949-05-17
•
Expires: 1965-10-16
Abstract
No abstract record available.
Inventors
- 👤 Campbell Thomas Coehrane
- 👤 Hall Eric Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:07
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE474955C
Cited
US1869871A
Cited
US2003206A
Cited
FR789619A
Cited
US2112755A
Cited
FR803976A
Cited
US2156994A
Cited
US2271226A
Cited
US2406625A
Cited
US2421694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |