Patent US2988070A successfully refreshed from Google Patents.
US2988070A
Expired / Lapsed
US
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Two-stroke engines
Assignee: Automobiles Citroen SA
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Filing: 1956-11-28
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Granted: 1961-06-13
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Expires: 1976-11-28
Abstract
No abstract record available.
Inventors
- 👤 Brueder Antoine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:14
CPC Classifications
F; F02; F02B; F02B25/00; F02B2720/00; F02B2720/13; F02B2720/137
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1574130A
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US1745020A
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US1967069A
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US2067984A
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US2067757A
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US2164451A
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US2330866A
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US2230740A
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US2281585A
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US2252512A
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US2728333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |