US2866447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engines
Assignee: ECONOMY ENGINE Co
•
Filing: 1956-02-27
•
Granted: 1958-12-30
•
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 16:04
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB466694A
Cited
US1393636A
Cited
US1559411A
Cited
FR586737A
Cited
FR624822A
Cited
US1758829A
Cited
US2025202A
Cited
US2152037A
Cited
US2238852A
Cited
US2456080A
Cited
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 |