Patent US3530951A successfully refreshed from Google Patents.
US3530951A
Expired / Lapsed
US
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Dual control system
Assignee: ZF Friedrichshafen AG
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Filing: 1968-04-01
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Granted: 1970-09-29
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Expires: 1988-04-01
Abstract
No abstract record available.
Inventors
- 👤 Willy Beig
- 👤 Willi Kuhnle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:12
CPC Classifications
B; B62; B62D; B62D1/00; B62D1/02; B62D1/22; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/18; B60W10/184; B60W30/00; B60W30/18; B60W30/18181; B60W50/00; B60W50/08; B60W50/12
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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |