Patent JPS5684599A successfully refreshed from Google Patents.
Patent US2141204A successfully refreshed from Google Patents.
US2642239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Float-equipped aircraft
Assignee: Individual
•
Filing: 1951-10-08
•
Granted: 1953-06-16
•
Expires: 1971-10-08
Abstract
No abstract record available.
Inventors
- 👤 Charles C Crossley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:27
CPC Classifications
B; B64; B64C; B64C35/00; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1157423A
Cited
US1396894A
Cited
US1746669A
Cited
US1812265A
Cited
US1894256A
Cited
US2062384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |