Patent US3661774A successfully refreshed from Google Patents.
US3661774A
Expired / Lapsed
US
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Separation of solids from a liquid
Assignee: Atlantic Richfield Co
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Filing: 1970-10-28
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Granted: 1972-05-09
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Expires: 1990-10-28
Abstract
Abstract A METHOD FOR SEPARATING SOLID PARTICLES FROM A LIQUID IN WHICH THEY ARE DISPERSED WHEREIN THE LIQUID IS SUBJECTED TO FORCE CONDITIONS SUCH AS GRAVITY SETTLING, CENTRIFUGATION, AND THE LIKE TO CAUSE THE SOLID PARTICLES TO COLLECT IN A LOCALIZED PORTION THEREOF, AND INTRODUCING A DISPLACEMENT LIQUID INTO THE LOCALIZED PORTION UNDER CONDITIONS SUCH THAT THE DISPLACEMENT LIQUID TAKES THE PLACE OF AT LEAST PART OF THE SOLIDS CONTAINING LIQUID IN THAT LOCALIZED PORTION, THE DISPLACEMENT LIQUID TAKING UP SOLID PARTICLES MIGRATING INTO THE LOCALIZED PROTION, AND REMOV- ING DISPLACEMENT LIQUID HAVING SOLID PARTICLES DISPERSED THEREIN.
Inventors
- 👤 George P Masologites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:42
CPC Classifications
C; C10; C10G; C10G31/00; B; B01; B01D; B01D12/00; B01D21/00; B01D21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |