Patent US2013296A successfully refreshed from Google Patents.
Patent US2437700A successfully refreshed from Google Patents.
US2437700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft
Assignee: —
•
Filing: —
•
Granted: 1948-03-16
•
Expires: 1965-03-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:47
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/46; B64C11/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US280595A
Cited
FR375975A
Cited
US1001956A
Cited
FR427217A
Cited
GB159223A
Cited
US1569607A
Cited
US2064195A
Cited
US2085483A
Cited
US2148313A
Cited
US2356746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |