US2881230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional crystallization process
Assignee: Phillips Petroleum Co
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Filing: 1955-09-26
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Granted: 1959-04-07
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Expires: 1975-09-26
Abstract
No abstract record available.
Inventors
- 👤 Charles K Buell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/0036; B01D9/004; C; C07; C07C; C07C7/00; C07C7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR THE SEPARATION OF A CRYSTALLIZABLE COMPONENT FROM A LIQUID MULTI-COMPONENT MIXTURE, WHICH PROCESS COMPRISES: CHILLING SAID MIXTURE IN A FIRST CHILLING ZONE UNDER LOW TURBULENE CONDITIONS TO A TEMPERATURE SUFFICEINT TO PRECIPIATE A PORTION OF SAID CRYSTALLIZABLE COMPONENT AS CRYSTAL NUCLEI; FURTHER CHILLING SAID CHILLED MIXTURE IN A SECOND CHILLING ZONE UNDER HIGH TURBULENCE CONDITIONS TO A TEMPERATURE SUFFICIENT TO PRECIPITATE ADDITIONAL CRYSTALLIZABLE COMPONENT AND FORM A SLURRY OF CRYSTALS OF SAID CRYSTALLIZABLE COMPONENT; PASSING EFFLUENT FROM SAID SECOND CHILLING ZONE TO A SEPARATION ZONE; AND
Claim 2
Dependent Claim
89 words
A PROCESS FOR THE SEPARATION OF A CRYSTALLIZABLE COMPONENT FROM A LIQUID MULTI-COMPONENT MIXTURE, WHICH PROCESS COMPRISES: CHILLING SAID MIXTURE IN A FIRST CHILLING ZONE UNDER LOW TURBULENE CONDITIONS TO A TEMPERATURE SUFFICEINT TO PRECIPIATE A PORTION OF SAID CRYSTALLIZABLE COMPONENT AS CRYSTAL NUCLEI; FURTHER CHILLING SAID CHILLED MIXTURE IN A SECOND CHILLING ZONE UNDER HIGH TURBULENCE CONDITIONS TO A TEMPERATURE SUFFICIENT TO PRECIPITATE ADDITIONAL CRYSTALLIZABLE COMPONENT AND FORM A SLURRY OF CRYSTALS OF SAID CRYSTALLIZABLE COMPONENT; PASSING EFFLUENT FROM SAID SECOND CHILLING ZONE TO A SEPARATION ZONE; AND
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |