Patent US2866447A successfully refreshed from Google Patents.
US2866447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engines
Assignee: ECONOMY ENGINE Co
•
Filing: 1956-02-27
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Granted: 1958-12-30
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Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Frank J Kaehni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:25
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/12; F02B1/00; F02B1/02; F02B1/04; H; H01; H01T; H01T13/00; H01T13/54; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB466694A
Cited
US1393636A
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US1559411A
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FR586737A
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FR624822A
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US1758829A
Cited
US2025202A
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US2152037A
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US2238852A
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US2456080A
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US2708428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |