Patent US2561665A successfully refreshed from Google Patents.
US2561665A
Expired / Lapsed
US
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Continuous classifier for solids
Assignee: Individual
•
Filing: 1947-12-03
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Granted: 1951-07-24
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Expires: 1967-12-03
Abstract
No abstract record available.
Inventors
- 👤 Fred T Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:22
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US895092A
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US701851A
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US968242A
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US1035864A
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GB325031A
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US1914039A
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US2150226A
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US2314421A
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US2358181A
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US2371615A
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US2405976A
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US2408221A
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US2425551A
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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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |