US2463991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for airplanes
Assignee: Individual
•
Filing: 1944-09-29
•
Granted: 1949-03-08
•
Expires: 1964-09-29
Abstract
No abstract record available.
Inventors
- 👤 Harry R Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
B; B64; B64D; B64D25/00; B64D25/08; B64D25/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US190998A
Cited
US1716597A
Cited
US1628098A
Cited
US1831055A
Cited
FR713098A
Cited
US1909697A
Cited
FR829331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |