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Patent US2637987A successfully refreshed from Google Patents.
US2637987A
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Overload release coupling
Assignee: HIL JON SAFETY CROWN CORP
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Filing: 1947-02-18
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Granted: 1953-05-12
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Expires: 1967-02-18
Abstract
No abstract record available.
Inventors
- 👤 Hill Charles
- 👤 Charles K Johns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:10
CPC Classifications
G; G04; G04B; G04B3/00; G04B3/06; F; F16; F16D; F16D7/00; F16D7/02; G10; G10F; G10F1/00; G10F1/06; F16D2300/00; F16D2300/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US310860A
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US1404816A
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GB200759A
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US1904681A
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US2017591A
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US2288955A
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US2311230A
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US2366257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |