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US2989840A
Expired / Lapsed
US
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Supercharged internal combustion engines
Assignee: S O B E M BREVETS ET D'ETUDES DE MOTEURS Ste
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Filing: 1957-07-18
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Granted: 1961-06-27
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Expires: 1977-07-18
Abstract
No abstract record available.
Inventors
- 👤 Lieberherr Hans Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:16
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/44; F02B37/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |