Patent US2758680A successfully refreshed from Google Patents.
US2758680A
Expired / Lapsed
US
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Internally expanding shoe brakes
Assignee: Dr Ing HCF Porsche AG
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Filing: 1952-01-12
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Granted: 1956-08-14
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Expires: 1972-01-12
Abstract
No abstract record available.
Inventors
- 👤 Rabe Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:46
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/22; F16D2125/00; F16D2125/18; F16D2125/58; F16D2125/60; F16D2125/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2002006A
Cited
US2109114A
Cited
US2118188A
Cited
US2161640A
Cited
US2192001A
Cited
US2351952A
Cited
GB642991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |