US2506142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stroke multicylinder engine
Assignee: Individual
•
Filing: 1945-07-10
•
Granted: 1950-05-02
•
Expires: 1965-07-10
Abstract
No abstract record available.
Inventors
- 👤 Echard Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:35
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1350159A
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US1607383A
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US1882448A
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US1811625A
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US1815868A
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GB375668A
Cited
US1999374A
Cited
US1963423A
Cited
US2133578A
Cited
US2159209A
Cited
US2283694A
Cited
US2311936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |