US2809222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction process
Assignee: Phillips Petroleum Co
•
Filing: 1953-11-27
•
Granted: 1957-10-08
•
Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Harold M Hawkins
- 👤 John A Weedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:55
CPC Classifications
C; C10; C10G; C10G21/00; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD FOR THE SOLVENT EXTRACTION OF A LIQUID IN A SOLVENT EXTRACTION ZONE WITH A SOLVENT WHICH IS HIGHER BOILING THAN EXTRACT REMOVED FROM SAID LIQUID IN SAID ZONE TO WHICH IS FED SAID LIQUID AT A POING INTERMEDIATE ITS ENDS AND FROM WHICH THERE ARE REMOVED A RAFFINATE AT A RAFFINATE END OF SAID ZONE, AT WHICH END SOLVENT FREE OF EXTRACT IS INTRODUCED, AND AN EXTRACT AT AN EXTRACT END OF SAID ZONE WHICH CMPOISES THE STEPS OF CONTACTING SAID LIQUID WITH SAID SOLVENT UNDER SOVENT EXTRACTION CONDITIONS IN A SOLVENT EXTRACTION ZONE; REMOVING AN EXTRACT PHASE FROM SAID ZONE; PARTIALLY SEPARATING EXRACT MATERIAL FROM SAID EXTRACT PHASE UNDER NON-SOLVENT EXTRACTION SONDITIONS, INCLUDING AT LEAST ONE FLASHING FORMING A PARTIALLY DENUDED
Claim 2
Independent Claim
124 words
A METHOD FOR THE SOLVENT EXTRACTION OF A LIQUID IN A SOLVENT EXTRACTION ZONE WITH A SOLVENT WHICH IS HIGHER BOILING THAN EXTRACT REMOVED FROM SAID LIQUID IN SAID ZONE TO WHICH IS FED SAID LIQUID AT A POING INTERMEDIATE ITS ENDS AND FROM WHICH THERE ARE REMOVED A RAFFINATE AT A RAFFINATE END OF SAID ZONE, AT WHICH END SOLVENT FREE OF EXTRACT IS INTRODUCED, AND AN EXTRACT AT AN EXTRACT END OF SAID ZONE WHICH CMPOISES THE STEPS OF CONTACTING SAID LIQUID WITH SAID SOLVENT UNDER SOVENT EXTRACTION CONDITIONS IN A SOLVENT EXTRACTION ZONE; REMOVING AN EXTRACT PHASE FROM SAID ZONE; PARTIALLY SEPARATING EXRACT MATERIAL FROM SAID EXTRACT PHASE UNDER NON-SOLVENT EXTRACTION SONDITIONS, INCLUDING AT LEAST ONE FLASHING FORMING A PARTIALLY DENUDED
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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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |