US3730769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for processing soluble crystals
Assignee: HAFTUNG FRIED KRUPP 4300 ESSEN 1 GERMANY GmbH
•
Filing: 1971-05-26
•
Granted: 1973-05-01
•
Expires: 1991-05-26
Abstract
Abstract SOLUBLE CRYSTALS ARE TREATED IN A CENTRIFUGE DRUM WHICH ROTATES AT A PREDETERMINED PREPHERAL SPEED. THE CRYSTALS ARE EJECTED THROUGH AN OUTLET OF THE DRUM INTO A RECEIVER OF ANNULAR CONFIGURATION AND TUBULAR CROSS-SECTION, HAVING A CIRCUMFERENTIAL SLOT THROUGH WHICH THE CRYSTALS ARE EJECTED INTO IT. A LIQUID IN WHICH THE CRYSTALS ARE SOLUBLE IS CONTAINED IN THE RECEIVER AND ROTATES AT A SECOND PERIPHERAL SPEED WHICH IS SMALLER THAN THE PERIPHERAL SPEED OF THE CENTRIFUGE DRUM.
Inventors
- 👤 B Fiedler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:17
CPC Classifications
B; B04; B04B; B04B3/00; B04B7/00; B04B7/02; B04B7/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |