US2438254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft
Assignee: Individual
•
Filing: 1943-08-20
•
Granted: 1948-03-23
•
Expires: 1963-08-20
Abstract
No abstract record available.
Inventors
- 👤 Edward A Stalker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:53
CPC Classifications
B; B64; B64C; B64C23/00; B64C23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1704831A
Cited
US1427872A
Cited
GB209435A
Cited
US1725724A
Cited
US2041791A
Cited
GB504747A
Cited
US2165482A
Cited
US2274442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |