US2684891A
Expired / Lapsed
US
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Method for the continuous crystallization of solids from their solutions
Assignee: Directie van de Staatsmijnen in Limburg
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Filing: 1948-10-25
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Granted: 1954-07-27
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Expires: 1968-10-25
Abstract
No abstract record available.
Inventors
- 👤 Hoek Theodorus Johann Josephus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |