US2852921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Booster brake mechanism
Assignee: ZF Active Safety US Inc
•
Filing: 1954-09-13
•
Granted: 1958-09-23
•
Expires: 1974-09-13
Abstract
No abstract record available.
Inventors
- 👤 Jr David T Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:25
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/241; B60T13/242; B60T13/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2328637A
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US2433953A
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US2787122A
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US2450160A
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US2407856A
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US2438723A
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US2455985A
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US2658328A
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US2705402A
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US2664707A
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US2761427A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |