Patent US1852579A successfully refreshed from Google Patents.
Patent US166350A successfully refreshed from Google Patents.
US2846292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous crystallization apparatus
Assignee: Sunoco Inc
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Filing: 1955-08-23
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Granted: 1958-08-05
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Expires: 1975-08-23
Abstract
No abstract record available.
Inventors
- 👤 James I Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:36
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/0063; C; C07; C07C; C07C7/00; C07C7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
A FRACTIONAL CRYSTALLIZATION APPARATUS INCLUDING IN COMBINATION A SEPARATION TUBE, A HEATING ZONE IN ONE END OF SAID SEPARATION TUBE, MEANS FOR SUPPLYING HEAT TO SAID HEATING ZONE, A FIRST LIQUID OUTLET CONNECTING WITH THE SEPARATION TUBE ASSOCIATED WITH SAID HEATING ZONE, A RECIPROCABLE PISTON WITHIN SAID TUBE AND REMOVED FROM SAID HEATING ZONE, A MOTOR ADAPTED TO IMPART RECIPROCATING MOTION TO SAID PISTON, A SECOND LIQUID OUTLET CONNECTING WITH THE SEPARATION TUBE AHEAD OF SAID RECIPROCABLE PISTON AT ITS POINT OF FURTHEST ENTRY INTO SAID TUBE, MEANS ASSOCIATED WITH SAID SECOND LIQUID OUTLET ADAPTED TO ALLOW PASSAGE OF LIQUID THERETHROUGH ONLY DURING THE MOVEMENT OF THE PISTON FROM ITS POINT OF LEAST ENTRY INTO THE TUBE TO ITS POINT OF FURTHEST ENTRY INTO THE TUBE, A THIRD LIQUID OUTLET CONNECTING WITH THE SEPARATION TUBE AHEAD OF THE RECIPROCATING PISTON AT ITS POINT OF LEAST ENTRY INTO SAID TUBE AND ADJACENT TO AND BEHIND SAID PISTON AT ITS POINT OF FURTHEST ENTRY INTO SAID TUBE, VALVE MEANS ASSOCIATED WITH SAID THIRD LIQUID OUTLET, AN INLET FOR INTRODUCING A SLURRY OF SOLIDS IN LIQUID CONNECTING WITH THE SEPARATION TUBE AT A POINT BETWEEN THE SECOND LIQUID OUTLET AND THE THIRD LIQUID OUTLET AND ADJACENT TO AND AHEAD OF SAID RECIPROCABLE PISTON
Claim 2
Dependent Claim
210 words
A FRACTIONAL CRYSTALLIZATION APPARATUS INCLUDING IN COMBINATION A SEPARATION TUBE, A HEATING ZONE IN ONE END OF SAID SEPARATION TUBE, MEANS FOR SUPPLYING HEAT TO SAID HEATING ZONE, A FIRST LIQUID OUTLET CONNECTING WITH THE SEPARATION TUBE ASSOCIATED WITH SAID HEATING ZONE, A RECIPROCABLE PISTON WITHIN SAID TUBE AND REMOVED FROM SAID HEATING ZONE, A MOTOR ADAPTED TO IMPART RECIPROCATING MOTION TO SAID PISTON, A SECOND LIQUID OUTLET CONNECTING WITH THE SEPARATION TUBE AHEAD OF SAID RECIPROCABLE PISTON AT ITS POINT OF FURTHEST ENTRY INTO SAID TUBE, MEANS ASSOCIATED WITH SAID SECOND LIQUID OUTLET ADAPTED TO ALLOW PASSAGE OF LIQUID THERETHROUGH ONLY DURING THE MOVEMENT OF THE PISTON FROM ITS POINT OF LEAST ENTRY INTO THE TUBE TO ITS POINT OF FURTHEST ENTRY INTO THE TUBE, A THIRD LIQUID OUTLET CONNECTING WITH THE SEPARATION TUBE AHEAD OF THE RECIPROCATING PISTON AT ITS POINT OF LEAST ENTRY INTO SAID TUBE AND ADJACENT TO AND BEHIND SAID PISTON AT ITS POINT OF FURTHEST ENTRY INTO SAID TUBE, VALVE MEANS ASSOCIATED WITH SAID THIRD LIQUID OUTLET, AN INLET FOR INTRODUCING A SLURRY OF SOLIDS IN LIQUID CONNECTING WITH THE SEPARATION TUBE AT A POINT BETWEEN THE SECOND LIQUID OUTLET AND THE THIRD LIQUID OUTLET AND ADJACENT TO AND AHEAD OF SAID RECIPROCABLE PISTON
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |