US2840326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerodynamic brake for aircraft
Assignee: Martin Co
•
Filing: 1949-12-24
•
Granted: 1958-06-24
•
Expires: 1969-12-24
Abstract
No abstract record available.
Inventors
- 👤 Urban W Richardson
- 👤 Rauth John Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:34
CPC Classifications
B; B64; B64D; B64D27/00; B64D27/02; B64D27/023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR539842A
Cited
US1773521A
Cited
US1879187A
Cited
US2116276A
Cited
US2421870A
Cited
GB507103A
Cited
FR891348A
Cited
US2204404A
Cited
FR914026A
Cited
US2460843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |