US2426438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine cylinder construction
Assignee: Fairchild Engine and Airplane Corp
•
Filing: 1944-03-01
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Granted: 1947-08-26
•
Expires: 1964-03-01
Abstract
No abstract record available.
Inventors
- 👤 Chester C Depew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:24
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/28; F02F1/30; F02F1/32; F02B; F02B2275/00; F02B2275/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB170436A
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US1848008A
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US2024334A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |