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Patent US2466255A successfully refreshed from Google Patents.
US2466255A
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US
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Balanced double-acting engine
Assignee: Individual
•
Filing: 1942-10-27
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Granted: 1949-04-05
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Expires: 1962-10-27
Abstract
No abstract record available.
Inventors
- 👤 Mercier Ernest Frederic
- 👤 Mercier Pierre Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:21
CPC Classifications
F; F02; F02B; F02B71/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1930786A
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US2132083A
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US2159197A
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US2241957A
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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) | 1952-04-04 | 1952-10-04 | 1953-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-04 | 1956-10-04 | 1957-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-04 | 1960-10-04 | 1961-04-05 | $7700.00 | Window Closed / Lapsed |