US2740513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable width roller skate-type gravity conveyor
Assignee: Alvey Ferguson Co
•
Filing: 1953-03-18
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Granted: 1956-04-03
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Expires: 1973-03-18
Abstract
No abstract record available.
Inventors
- 👤 Norman M Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:08
CPC Classifications
B; B65; B65G; B65G13/00; B65G13/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US312468A
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US492416A
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US842156A
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US984379A
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US1021876A
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US1534334A
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US1842981A
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US1824276A
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US2309723A
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US2438527A
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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) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |