Patent US3542164A successfully refreshed from Google Patents.
US3542164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-servo,torque responsive brake valving device
Assignee: Dunlop Co Ltd
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Filing: 1969-02-19
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Granted: 1970-11-24
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Expires: 1989-02-19
Abstract
No abstract record available.
Inventors
- 👤 Frank Radcliffe Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:09
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/24; B60T11/28; B60T13/00; B60T13/02
Claims Analysis
Total Claims: 0
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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) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |