US2749893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam shaft drives for the valve gear of multibank internal combustion engines
Assignee: Dr Ing HCF Porsche AG
•
Filing: 1953-10-26
•
Granted: 1956-06-12
•
Expires: 1973-10-26
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand A E Porsche
- 👤 Fuhrmann Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:34
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/02; F01L1/026; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/24; F02B75/243; F01L1/04; F01L1/047; F01L1/053; F01L2001/0537; F01L3/00; F01L2003/25; F02B2275/00; F02B2275/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |