US3723310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for flocculating oil and clay containing slimes
Assignee: International Minerals and Chemical Corp
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Filing: 1969-10-07
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Granted: 1973-03-27
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Expires: 1989-10-07
Abstract
Abstract FINELY-DIVIDED CLAY HAVING HYDROCARBONS IN INTIMATE ASSOCIATION THEREWITH IS FLOCCULATED AND SETTLED FROM AN AQUEOUS SUSPENSION THEREOF BY ADDING ACRYLIC ACID OR A WATER-DISPERSIBLE ANIONIC ACRYLIC ACID-DERIVED POLYMER, AND ALLOWING RESULTING FLOCCULATED SOLIDS TO SETTLE. SUSPENDED SILICA MAY ALSO BE FLOCCULATED AND SETTLED BY ADDING A WATER-DISPERSIBLE CATIONIC OR NONIONIC POLYMER OR AN INORGANIC SALT AS A SECONDARY FLOCCULANT.
Inventors
- 👤 W Lang
- 👤 D Hentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:00
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; B; B01; B01D; B01D21/00; B01D21/01; C02F1/54
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |