US2793631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve timing of four cycle internal combustion engines with a great overlapping of the exhaust-and intakeperiods
Assignee: Daimler Benz AG
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Filing: 1952-04-25
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Granted: 1957-05-28
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Expires: 1972-04-25
Abstract
No abstract record available.
Inventors
- 👤 Schilling Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:46
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F01L1/0532; F02; F02B; F02B2275/00; F02B2275/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1205095A
Cited
US2113077A
Cited
US2306580A
Cited
US2131959A
Cited
US2281987A
Cited
US2305946A
Cited
US2649083A
Cited
US2644436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |