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Patent US3056480A successfully refreshed from Google Patents.
US3056480A
Expired / Lapsed
US
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Sealed ratchet lever hoist
Assignee: Duff Norton Co Inc
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Filing: 1958-08-07
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Granted: 1962-10-02
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Expires: 1978-08-07
Abstract
No abstract record available.
Inventors
- 👤 Carroll Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:54
CPC Classifications
B; B66; B66D; B66D3/00; B66D3/12; B66D3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2243361A
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US2310135A
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US2687196A
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US2760615A
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US2736408A
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GB795659A
Cited
US2808915A
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US2848083A
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US2905292A
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US2894610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |