US2594072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper with bottom discharge opening and means for metering the passage of granular material through said opening into a delivery conduit
Assignee: Individual
•
Filing: 1949-03-29
•
Granted: 1952-04-22
•
Expires: 1969-03-29
Abstract
No abstract record available.
Inventors
- 👤 Ian M Ridley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/06; B65G53/10; B65G53/12; B28; B28C; B28C7/00; B28C7/04; B28C7/06; B28C7/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US184234A
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US1323663A
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US991814A
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US1216197A
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US1539606A
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US1559666A
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US2002420A
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US2102993A
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US2120003A
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US2202848A
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US2240205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |