Patent US3407844A successfully refreshed from Google Patents.
US3407844A
Expired / Lapsed
US
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Valve for power steering systems
Assignee: ZF Friedrichshafen AG
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Filing: 1966-04-04
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Granted: 1968-10-29
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Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 Linser Joerg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:15
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/20; B62D5/24; B62D5/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3180233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |