Patent US2551739A successfully refreshed from Google Patents.
US2551739A
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US
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Spring clutch and energizing means
Assignee: Marquette Metal Products Co
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Filing: 1950-02-03
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Granted: 1951-05-08
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Expires: 1970-02-03
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:43
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/08; F16H; F16H55/00; F16H55/32; F16H55/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1501978A
Cited
US2001120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |