Patent US2621769A successfully refreshed from Google Patents.
US2621769A
Expired / Lapsed
US
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Flexible plate clutch or brake
Assignee: CARDWELL Mfg CO Inc
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Filing: 1947-05-15
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Granted: 1952-12-16
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Expires: 1967-05-15
Abstract
No abstract record available.
Inventors
- 👤 Harland W Cardwell
- 👤 Earl R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:36
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/04; F16D55/06; F16D25/00; F16D25/04; F16D25/042; F16D25/044; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2937; Y10T137/294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US427085A
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FR372825A
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US1048299A
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US1578815A
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US2183761A
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US2307456A
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US2267650A
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US2381941A
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US2446694A
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US2467830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |