Patent US2719642A successfully refreshed from Google Patents.
US2719642A
Expired / Lapsed
US
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Hopper car with multiple reciprocating conveyors
Assignee: Joy Manufacturing Co
•
Filing: 1949-12-31
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Granted: 1955-10-04
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Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:14
CPC Classifications
E; E21; E21F; E21F13/00; E21F13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1085630A
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US1209312A
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US1341239A
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US1592316A
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US1837994A
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US2093148A
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US2107682A
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US2420009A
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US2559541A
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US2588341A
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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) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |