Patent US2564052A successfully refreshed from Google Patents.
US2564052A
Expired / Lapsed
US
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Internal-combustion engine
Assignee: Individual
•
Filing: 1948-02-12
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Granted: 1951-08-14
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Expires: 1968-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Leslie L Chiville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:54
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/28; F02B75/287; F01; F01L; F01L9/00; F01L9/10; F02B71/00; F02B71/04; F02B71/045; F02B75/02; F02B2075/022; F02B2075/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1135587A
Cited
US1835834A
Cited
US2077802A
Cited
US2391972A
Cited
US2403440A
Cited
US2441277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |