US3491731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-cooled cylinder head of an internal combustion engine
Assignee: Daimler Benz AG
•
Filing: 1967-12-27
•
Granted: 1970-01-27
•
Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Hans Dinger
- 👤 Herbert Deutschmann
- 👤 Ulrich Conrad
- 👤 Willi Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:37
CPC Classifications
F; F01; F01P; F01P3/00; F01P3/12; F01P3/14; F02; F02B; F02B19/00; F02B19/14; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/38; F02F1/40; F02F1/42; F02F1/4214; F02B2275/00; F02B2275/14; F02F2001/244; F02F2001/247; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1845521A
Cited
US2234780A
Cited
US2619078A
Cited
US2739579A
Cited
US2736300A
Cited
GB724461A
Cited
US3081755A
Cited
US3353522A
Cited
US3377996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |