Patent US3011639A successfully refreshed from Google Patents.
US3011639A
Expired / Lapsed
US
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Screening apparatus for separating material
Assignee: State Steel Products Inc
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Filing: 1958-03-04
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Granted: 1961-12-05
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Expires: 1978-03-04
Abstract
No abstract record available.
Inventors
- 👤 Lee B Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:53
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/06; B07B1/28; B07B1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US82011A
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US456584A
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US545185A
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US1459840A
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US1284095A
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CH113165A
Cited
US2696302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |