US2676469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for dehydration of liquids by freezing
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1950-11-20
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Granted: 1954-04-27
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Expires: 1970-11-20
Abstract
No abstract record available.
Inventors
- 👤 Wenzelberger Elwood Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:22
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/12; B; B01; B01D; B01D9/00; B01D9/02; B01D9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US994555A
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US1546669A
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US1906534A
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US2186887A
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US2337317A
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US2448802A
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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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |