US3137544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallizing apparatus and method of operating the same
Assignee: GEA Group AG
•
Filing: 1958-05-20
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Granted: 1964-06-16
•
Expires: 1978-05-20
Abstract
No abstract record available.
Inventors
- 👤 Ebner Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:27
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
AN APPARATUS FOR OBTAINING LARGE AND UNIFORM CRYSTALS FROM SOLUTIONS WHICH COMPRISES A CLOSED VESSEL HAVING AN INWARDLY AND DOWNWARDLY TAPERING BOTTOM PORTION, SAID BOTTOM PORTION TERMINATING IN A CRYSTAL DISCHARGE OUTLET, SAID VESSEL BEING DIVIDED INTO AN UPPER EVAPORATION ZONE AND A LOWER CRYSTALLIZATION ZONE, MEANS DEFINING A FUNNEL-SHAPED CHAMBER BEING OPEN AT BOTH ITS UPPER AND LOWER ENDS COMPLETELY DISPOSED WITHIN SAID VESSEL AND SPACED FROM THE SIDES THEREOF AT BOTH SAID UPPER AND LOWER ENDS, THE UPPER END OF SID FUNNEL-SHAPED CHAMBER EXTENDING INTO SAID EVAPORATION ZONE AND THE LOWER END OF SAID FUNNEL-SHAPED CHAMBER EXTENDING INTO SAID CRYSTALLIZATION ZONE,SAID VESSEL BEING CAPABLE OF CONTAINING A SOLUTION AT A LEVEL AT LEAST BELOW THE UPPER END OF SAID FUNNEL-SHAPED CHAMBER, MEANS FOR REMOVING VAPORS FROM THE TOP OF SAID VESSEL, CIRCULATING MEANS FOR WITHDRAWING SOLUTION FROM SAID VESSEL TO A LOWER LEVEL AND THENCE TO ANUPPER LEVEL AND TERMINATING IN A DISCHARGE OPENING ABOVE AND SPACED FROM SAID FUNNEL-SHAPED CHAMBER, SAID LOWER LEVEL BEING BELOW THE LEVEL OF SAID SOLUTION A DISTANCE OF FROM ABOUT 10 TO 20 TIME THE DISTANCE SAID UPPER LEVEL IS ABOVE THE LEVEL OF SAID SOLUTION, AN AIR INLET MEANS CONNECTED TO SAID CIRCULATING MEANS AT SAID LOWER LEVEL, AND MEANS FOR ADDING FRESH SOLUTION TO SAID APPARATUS.
Claim 2
Independent Claim
216 words
AN APPARATUS FOR OBTAINING LARGE AND UNIFORM CRYSTALS FROM SOLUTIONS WHICH COMPRISES A CLOSED VESSEL HAVING AN INWARDLY AND DOWNWARDLY TAPERING BOTTOM PORTION, SAID BOTTOM PORTION TERMINATING IN A CRYSTAL DISCHARGE OUTLET, SAID VESSEL BEING DIVIDED INTO AN UPPER EVAPORATION ZONE AND A LOWER CRYSTALLIZATION ZONE, MEANS DEFINING A FUNNEL-SHAPED CHAMBER BEING OPEN AT BOTH ITS UPPER AND LOWER ENDS COMPLETELY DISPOSED WITHIN SAID VESSEL AND SPACED FROM THE SIDES THEREOF AT BOTH SAID UPPER AND LOWER ENDS, THE UPPER END OF SID FUNNEL-SHAPED CHAMBER EXTENDING INTO SAID EVAPORATION ZONE AND THE LOWER END OF SAID FUNNEL-SHAPED CHAMBER EXTENDING INTO SAID CRYSTALLIZATION ZONE,SAID VESSEL BEING CAPABLE OF CONTAINING A SOLUTION AT A LEVEL AT LEAST BELOW THE UPPER END OF SAID FUNNEL-SHAPED CHAMBER, MEANS FOR REMOVING VAPORS FROM THE TOP OF SAID VESSEL, CIRCULATING MEANS FOR WITHDRAWING SOLUTION FROM SAID VESSEL TO A LOWER LEVEL AND THENCE TO ANUPPER LEVEL AND TERMINATING IN A DISCHARGE OPENING ABOVE AND SPACED FROM SAID FUNNEL-SHAPED CHAMBER, SAID LOWER LEVEL BEING BELOW THE LEVEL OF SAID SOLUTION A DISTANCE OF FROM ABOUT 10 TO 20 TIME THE DISTANCE SAID UPPER LEVEL IS ABOVE THE LEVEL OF SAID SOLUTION, AN AIR INLET MEANS CONNECTED TO SAID CIRCULATING MEANS AT SAID LOWER LEVEL, AND MEANS FOR ADDING FRESH SOLUTION TO SAID APPARATUS.
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |