US3691071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pelleted carbon black containing surfactant
Assignee: Phillips Petroleum Co
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Filing: 1970-04-13
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Granted: 1972-09-12
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Expires: 1990-04-13
Abstract
Abstract PELLETED CARBON BLACK, AND PROCESS FOR PREPARING SAME, CONTAINING AT LEAST ONE OF (A) AN OIL-DISPLACING SURFACTANT AND (B) A SUSPENDING AND STABILIZING SURFACTANT. THE PELLETED CARBON BLACK AND SURFACTANTS ARE USEFUL IN THE PRODUCTION OF OIL FROM AN OIL STRATUM BY WATER FLOODING.
Inventors
- 👤 Myron L Corrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:49
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/92; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/14; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |