US3520289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion process for internal combustion engines
Assignee: Daimler Benz AG
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Filing: 1968-03-21
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Granted: 1970-07-14
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Expires: 1988-03-21
Abstract
Abstract 1,091,750. Combustion chambers. DAIMLER-BENZ A. G. Nov. 23, 1965 [Dec. 5, 1964; June 3, 1965], No. 49675/65. Heading F1B. In a spark ignition engine the combustible mixture rotates about the cylinder axis and is compressed into a combustion chamber 6 in the piston head.
Inventors
- 👤 Heinrich Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:53
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/08; F02B31/00; F02M; F02M1/00; G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; F02B1/00; F02B1/02; F02B1/04; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
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References Cited (Backward Citations)
US1701537A
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US2749900A
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US3045655A
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US3104922A
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US3145696A
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US3150654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |