Patent US3093649A successfully refreshed from Google Patents.
US3093649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional crystallization process
Assignee: Phillips Petroleum Co
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Filing: 1957-04-03
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Granted: 1963-06-11
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Expires: 1977-04-03
Abstract
No abstract record available.
Inventors
- 👤 John D Ratje
- 👤 Harold W Tompkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:44
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/0063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A PROCESS WHICH COMPRISES COOLING A LIQUID MULTICOMPONENT MIXTURE TO FORM A SLURRY OF SOLIDS IN MOTHER LIQUOR, PASSING SAID SLURRY OF SOLIDS IN MOTHER LIQUOR INTO A PURIFICATION ZONE, SEPARATING MOTHER LIQUOR FROM SAID SLURRY WITHIN SAID PURIFICATION ZONE, MOVING SOLIDS THROUGH SAID PURIFICATION ZONE TOWARD A MELTING ZONE, MELTING SOLIDS IN SAID MELTING ZONE, DISPLACING A PORTION OF THE RESULTING MELT INTO SAID MOVING SOLIDS, AND RECOVERING A PURIFIED PRODUCT FROM SAID MELTING ZONE, THE IMPROVEMENT COMPRISING MEASURING THE DIELECTRIC PROPERTIES OF SAID SLURRY PASSING INTO SAID PURIFICATION ZONE, AND ADJUSTING SAID COOLING TO REGULATE THE SOLIDS CONTENT OF THE SLURRY BEING FORMED IN RESPONSE TO SAID MEASUREMENT.
Claim 2
Dependent Claim
111 words
IN A PROCESS WHICH COMPRISES COOLING A LIQUID MULTICOMPONENT MIXTURE TO FORM A SLURRY OF SOLIDS IN MOTHER LIQUOR, PASSING SAID SLURRY OF SOLIDS IN MOTHER LIQUOR INTO A PURIFICATION ZONE, SEPARATING MOTHER LIQUOR FROM SAID SLURRY WITHIN SAID PURIFICATION ZONE, MOVING SOLIDS THROUGH SAID PURIFICATION ZONE TOWARD A MELTING ZONE, MELTING SOLIDS IN SAID MELTING ZONE, DISPLACING A PORTION OF THE RESULTING MELT INTO SAID MOVING SOLIDS, AND RECOVERING A PURIFIED PRODUCT FROM SAID MELTING ZONE, THE IMPROVEMENT COMPRISING MEASURING THE DIELECTRIC PROPERTIES OF SAID SLURRY PASSING INTO SAID PURIFICATION ZONE, AND ADJUSTING SAID COOLING TO REGULATE THE SOLIDS CONTENT OF THE SLURRY BEING FORMED IN RESPONSE TO SAID MEASUREMENT.
References Cited (Backward Citations)
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |