US2430947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airscrew
Assignee: McDonnell Aircraft Corp
•
Filing: 1943-09-23
•
Granted: 1947-11-18
•
Expires: 1963-09-23
Abstract
No abstract record available.
Inventors
- 👤 Haviland H Platt
- 👤 Page Wynn Laurence Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:21
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1455442A
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US1872337A
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US1977834A
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US2088413A
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US2265366A
Cited
US2203012A
Cited
US2122428A
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US2169849A
Cited
US2273303A
Cited
US2317629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |