Patent US3395535A successfully refreshed from Google Patents.
US3395535A
Expired / Lapsed
US
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Pneumatic-hydraulic tread brake unit
Assignee: Westinghouse Air Brake Co
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Filing: 1966-06-27
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Granted: 1968-08-06
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Robert B Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:48
CPC Classifications
B; B61; B61H; B61H15/00; B61H15/0092; B60; B60T; B60T13/00; B60T13/10; B60T13/58; B60T13/581; B60T13/583; B61H1/00; B61H1/003; F; F16; F16D; F16D65/00; F16D65/38; F16D65/72; F16D65/74; F16D2125/00; F16D2125/02; F16D2125/10
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) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |