US2644295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound combustion engine
Assignee: Individual
•
Filing: 1950-01-03
•
Granted: 1953-07-07
•
Expires: 1970-01-03
Abstract
No abstract record available.
Inventors
- 👤 Adolphe C Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:01
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/12; F01K23/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2176021A
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US2348518A
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US2346587A
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US2431563A
Cited
US2468157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |