Patent US2946561A successfully refreshed from Google Patents.
US2946561A
Expired / Lapsed
US
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Hoisting apparatus
Assignee: IDECO Inc
•
Filing: 1956-03-28
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Granted: 1960-07-26
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Expires: 1976-03-28
Abstract
No abstract record available.
Inventors
- 👤 Warren K Thorson
- 👤 Archie R Mclerran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:37
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; B; B66; B66D; B66D1/00; B66D1/28; B66D1/36; B66D2700/00; B66D2700/01; B66D2700/0183; B66D2700/0191
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR709875A
Cited
US2151057A
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US2241274A
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US2293958A
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US2404368A
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US2570901A
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US2556948A
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US2681793A
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US2654571A
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US2738161A
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US2737367A
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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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |