US3455178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic hydraulic driving chain tensioning device
Assignee: Dr Ing HCF Porsche AG
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Filing: 1967-09-08
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Granted: 1969-07-15
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Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 Karl Ruoff
- 👤 Walter Mittermeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:59
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F01; F01L; F01L1/00; F01L1/02; F01L1/022; F01L1/024; F01L3/00; F01L2003/25; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2275/00; F02B2275/08; F02B75/16; F02B75/18; F02B75/24; F02B75/243; F16H2007/0802; F16H2007/0806; F16H7/0848; F16H2007/0859; F16H2007/0863; F16H2007/0872; F16H2007/0889; F16H2007/0891; F16H2007/0893
Claims Analysis
Total Claims: 0
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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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |