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US2984992A
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Apparatus for freeze dehydration of liquid bearing solids
Assignee: Union Carbide Corp
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Filing: 1954-07-28
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Granted: 1961-05-23
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Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Elwood P Wenzelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:02
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/02; B01D9/04; A; A23; A23B; A23B2/00; A23B2/90; A23B2/92; A23F; A23F5/00; A23F5/24; A23F5/28; A23F5/30; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1738275A
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US2354633A
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US2436218A
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US2575374A
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US2563093A
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US2676469A
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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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |