Patent US2820530A successfully refreshed from Google Patents.
US2820530A
Expired / Lapsed
US
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Operating mechanism for disc brakes
Assignee: Whitnash PLC
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Filing: 1954-02-23
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Granted: 1958-01-21
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Chouings Leslie Cyril
- 👤 Warnke Eric Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:06
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D55/225; F16D55/226; F16D65/00; F16D65/14; F16D65/16; F16D65/18; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/561; F16D65/563; F16D65/567; F16D2055/0004; F16D2055/0016; F16D2055/007; F16D2121/00; F16D2121/02; F16D2121/14; F16D2123/00; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1592715A
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US1463112A
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US1875095A
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US2245987A
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US2351041A
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US2672223A
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US2612969A
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US2539090A
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US2669327A
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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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |