US3694355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the removal of solid particles from aqueous suspensions
Assignee: Shell USA Inc
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Filing: 1970-09-16
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Granted: 1972-09-26
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Expires: 1990-09-16
Abstract
Abstract SOLID PARTICLES SUCH AS SOOT ARE REMOVED FROM AQUEOUS SUSPENSIONS BY A TWO STEP PROCESS, THE FIRST STEP BEING TO AGGLOMERATE THE PARTICLES BY CONTACTING THEM WITH GENTLE AGITATION WITH A WATER-IMMISCIBLE LIQUID, AND THEN TO CONTACT THE AGGLOMERATE-CONTAINING AQUEOUS PHASE WITH A CONTINUOUS PHASE THAT IS WATER IMMISCIBLE UNDER CONDITIONS SUCH THAT THE AGGLOMERATES ENTER THE NON-AQUEOUS PHASE.
Inventors
- 👤 Pieter Visser
- 👤 Leonard W Ter Haar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:00
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; B; B01; B01D; B01D12/00; B01J; B01J2/00; B01J2/28; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 0
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |