US3349909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating particles of different water wettability
Assignee: Shell USA Inc
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Filing: 1964-11-02
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Granted: 1967-10-31
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Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Heinz P Studer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:08
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06; B03D1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR SEPARATING A MIXTURE OF MORE WATER WETTABLE MATERIAL FROM LESS WATER WETTABLE MATERIALS COMPRISING: (1) COMINUTING SAID MIXTURE INTO PARTICLES FROM ABOUT 1 TO ABOUT 20 MICRONS; (2) INTRODUCING SAID MIXTURE OF PARTICLES INTO A TWOPHASE THREE-LIQUID SYSTEM CONTAINING AN AQUEOUS LIQUID, A WATER-IMMISCIBLE LIQUID AND A THIRD LIQUID MISCIBLE WITH BOTH THE AQUEOUS AND WATER-IMMISCIBLE LIQUIDS, SAID THIRD LIQUID BEING PRESENT IN AN AMOUNT LESS THAT THAT WHICH WILL CAUSE A COMPLETE MIXTURE OF THE THREE LIQUIDS THEREBY FORMING AN AQUEOUS PHASE AND A NON-AQUEOUS PHASE; (3) AGITATING SAID MIXTURE IN SAID LIQUID SYSTEM TO BRING THE MIXTURE INTO CONTACT WITH BOTH PHASES THEREBY CAUSING THE LESS WATER-WETTABLE MATERIALS TO SEPARATE INTO THE NON-AQUEOUS PHASE AND THE MORE WATER-WETTABLE MATERIALS TO SEPARATE INTO THE AQUEOUS PHASE; AND (4) RECOVERING THE SEPARATED PARTICLES FROM EACH OF SAID PHASES.
Claim 2
Dependent Claim
141 words
A PROCESS FOR SEPARATING A MIXTURE OF MORE WATER WETTABLE MATERIAL FROM LESS WATER WETTABLE MATERIALS COMPRISING: (1) COMINUTING SAID MIXTURE INTO PARTICLES FROM ABOUT 1 TO ABOUT 20 MICRONS; (2) INTRODUCING SAID MIXTURE OF PARTICLES INTO A TWOPHASE THREE-LIQUID SYSTEM CONTAINING AN AQUEOUS LIQUID, A WATER-IMMISCIBLE LIQUID AND A THIRD LIQUID MISCIBLE WITH BOTH THE AQUEOUS AND WATER-IMMISCIBLE LIQUIDS, SAID THIRD LIQUID BEING PRESENT IN AN AMOUNT LESS THAT THAT WHICH WILL CAUSE A COMPLETE MIXTURE OF THE THREE LIQUIDS THEREBY FORMING AN AQUEOUS PHASE AND A NON-AQUEOUS PHASE; (3) AGITATING SAID MIXTURE IN SAID LIQUID SYSTEM TO BRING THE MIXTURE INTO CONTACT WITH BOTH PHASES THEREBY CAUSING THE LESS WATER-WETTABLE MATERIALS TO SEPARATE INTO THE NON-AQUEOUS PHASE AND THE MORE WATER-WETTABLE MATERIALS TO SEPARATE INTO THE AQUEOUS PHASE; AND (4) RECOVERING THE SEPARATED PARTICLES FROM EACH OF SAID PHASES.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |