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US2941844A
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Tractor-trailer brake system
Assignee: ZF Active Safety US Inc
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Filing: 1958-04-07
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Granted: 1960-06-21
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Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Stelzer William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/66; B60T13/68; B60T13/683; B60T15/00; B60T15/02; B60T15/36; B60T15/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2035305A
Cited
US2434050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |