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Patent US2510221A successfully refreshed from Google Patents.
US2510221A
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Apparatus and method for solvent extraction
Assignee: Blaw Knox Co
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Filing: 1943-10-18
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Granted: 1950-06-06
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Expires: 1963-10-18
Abstract
No abstract record available.
Inventors
- 👤 Guy N Harcourt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:08
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/44; B65D5/48; B65D5/48024; B65D5/48046; C; C11; C11B; C11B1/00; C11B1/10; C11B1/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2107537A
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US2111360A
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US2183837A
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US2231154A
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US2204777A
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US2264390A
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US2227605A
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US2280811A
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US2276298A
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US2381965A
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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) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |