US2668043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch type speed responsive device with magnetic link
Assignee: WINTERBURN
•
Filing: 1951-03-31
•
Granted: 1954-02-02
•
Expires: 1971-03-31
Abstract
No abstract record available.
Inventors
- 👤 George A Winterburn
- 👤 Clarence B Walworth
- 👤 Leroy E Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:10
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/54; H01H3/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2347613A
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GB562799A
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US2415916A
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US2529481A
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US2524261A
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US2600011A
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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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |