Patent US2968257A successfully refreshed from Google Patents.
US2968257A
Expired / Lapsed
US
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Conveyor trolley
Assignee: Columbus McKinnon Chain Corp
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Filing: 1957-01-11
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Granted: 1961-01-17
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Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Schreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:33
CPC Classifications
B; B65; B65G; B65G9/00; B65G9/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US476600A
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US743786A
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US1087062A
Cited
FR734007A
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US2234620A
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US2250167A
Cited
US2634851A
Cited
US2566962A
Cited
CH314191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |