Patent US3534841A successfully refreshed from Google Patents.
US3534841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch disc with dampers in series
Assignee: ZF Friedrichshafen AG
•
Filing: 1969-01-21
•
Granted: 1970-10-20
•
Expires: 1989-01-21
Abstract
No abstract record available.
Inventors
- 👤 Gustav Schneider
- 👤 Johann Dantele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:39
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/12; F16F15/129; F16F15/121; F16F15/123; F16F15/1238
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |