Patent US2443543A successfully refreshed from Google Patents.
US2443543A
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Screen clearing mechanism for grain and seed sizing machines
Assignee: SUPERIOR SEPARATOR Co
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Filing: 1945-04-11
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Granted: 1948-06-15
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Expires: 1965-04-11
Abstract
No abstract record available.
Inventors
- 👤 William J Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:33
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/50; B07B1/52; B07B1/522; B07B1/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US190572A
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US403088A
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US427774A
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US1122765A
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US1247427A
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US1202378A
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US1286389A
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US1234299A
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US2051085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |