US2426296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing soluble impurities from solid substances
Assignee: Individual
•
Filing: 1940-12-10
•
Granted: 1947-08-26
•
Expires: 1960-12-10
Abstract
No abstract record available.
Inventors
- 👤 Chesny Heinz Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:08
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/14; C01F5/145; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB329030A
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US2010207A
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US2099379A
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US2190136A
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US2231154A
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US2214925A
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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) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |