US3846335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for recovering oil from water
Assignee: Cal-Ment Corp
•
Filing: 1973-06-06
•
Granted: 1974-11-05
•
Expires: 1993-06-06
Abstract
Abstract A matrix material is provided for recovering oil from water comprised of finely divided coal particles bonded in spaced relation by polyethylene. The oil sorption capability of the matrix is exceptionally high and the matrix is highly selective to oil in the presence of oil and water. A closed system is provided for forming the matrix material and for separating the sorbed oil from the matrix material for reuse of the latter. The matrix material can be in the form of a fixed or movable bed through which the oil and water pass for selective sorption of the oil, or the material can be dispersed on the water surface and collected following oil sorption.
Inventors
- 👤 C Bunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:05
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; E; E02; E02B; E02B15/00; E02B15/04; E02B15/046; E02B15/047; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/924; Y10T; Y10T428/00; Y10T428/26; Y10T428/268
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
COMPOSITION PREPARED BY THE METHOD CONSISTING OF THE FOLLOWING STEPS: A. MIXING FINELY DIVIDED COAL-200 MESH OR FINER IN SIZE AND POWDERED POLYETHYLENE IN THE PRESENCE OF A LIQUID IN SUFFICIENT AMOUNT TO EFFECT INTIMATE OD SAID COAL AND POLYETHYLENE TO FORM A MATRIX SLURRY OR PASTE, SAID COAL COMPRISING AT LEAST 65 PERCENT BY WEIGHT OF SAID MIXTURE,
Claim 2
Dependent Claim
59 words
COMPOSITION PREPARED BY THE METHOD CONSISTING OF THE FOLLOWING STEPS: A. MIXING FINELY DIVIDED COAL-200 MESH OR FINER IN SIZE AND POWDERED POLYETHYLENE IN THE PRESENCE OF A LIQUID IN SUFFICIENT AMOUNT TO EFFECT INTIMATE OD SAID COAL AND POLYETHYLENE TO FORM A MATRIX SLURRY OR PASTE, SAID COAL COMPRISING AT LEAST 65 PERCENT BY WEIGHT OF SAID MIXTURE,
References Cited (Backward Citations)
US3536615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |