US3700595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrofluid composition
Assignee: Avco Corp
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Filing: 1970-06-15
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Granted: 1972-10-24
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Expires: 1990-06-15
Abstract
Abstract THE PRESENT INVENTION RELATES TO A FERROFLUID COMPOSITION USABLE TO CONTROL OIL SPILLS FLOATING ON OPEN BODIES OF WATER. SUCH A PROCESS INVOLVES DISPERSING THE PRESENT HYDROCARBON BASE FERROFLUID INTO THE OIL SLICK, THEN USING A MAGNETIC FIELD TO ATTRACT AN PICK UP THE OIL. THE SAME FERROFLUID COMPOSITION IS ASLO USEFUL TO SEPARATE WATER HYDROCARBON OIL EMULSIONS.
Inventors
- 👤 Robert Kaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/005; B03C1/01; H; H01; H01F; H01F1/00; H01F1/44
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |