Patent US2600529A successfully refreshed from Google Patents.
US2600529A
Expired / Lapsed
US
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Engine cylinder construction for cooling valve seat inserts
Assignee: Fairchild Engine and Airplane Corp
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Filing: 1946-06-19
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Granted: 1952-06-17
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Expires: 1966-06-19
Abstract
No abstract record available.
Inventors
- 👤 Alfred T Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:59
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/22; F01P; F01P1/00; F01P1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1233964A
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US1168752A
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US1562555A
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US2136690A
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US2112232A
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US2275503A
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US2134250A
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US2191485A
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US2331554A
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US2280660A
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US2369025A
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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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |