US2450491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter
Assignee: AIREX Manufacturing Co Inc
•
Filing: 1943-05-03
•
Granted: 1948-10-05
•
Expires: 1963-05-03
Abstract
No abstract record available.
Inventors
- 👤 Nicholas N Solovioff
- 👤 Nelson G Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:17
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/08; B64C27/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2384516A
Cited
US1701762A
Cited
US1800470A
Cited
US2037745A
Cited
US2156334A
Cited
US2256918A
Cited
US2256635A
Cited
US2368698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |