Patent US5556389A successfully refreshed from Google Patents.
US4059666A
Expired / Lapsed
US
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Method of converting oil and waste containing sludge to dry waste
Assignee: Individual
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Filing: 1975-04-17
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Granted: 1977-11-22
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Expires: 1995-04-17
Abstract
Abstract This disclosure is a method of converting oil and water containing sludge to dry waste in a plurality of steps as follows: 1. Adding to the sludge a petrophylic material to absorb the oil and to separate out the water which is permitted to drain. 2. Adding fibrous material for strength to bond the petrophylic material. 3. Having drained the excess water from the sludge add hydrophylic material to absorb any of the water which may be intermixed. 4. Sealing the external surface of the substantially dry material.
Inventors
- 👤 Leslie L. Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:47
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/32; C02; C02F; C02F11/00; C02F11/008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
The method of converting oil and water containing sludge to dry waste comprising the steps of: 1. adding to the sludge petrophylic material selected from the group consisting of waste roofing felt and polyurethane fibers, in an amount sufficient to absorb the oily component of the sludge material; 2. adding to the mixture of sludge and petrophylic material fibrous material selected from the group consisting of fiberglass wastes, chopped glass fibers, Spanish moss, hay, straw and cornstalks in an amount sufficient to strengthen and bond the particles of petrophylic material; 3. allowing the entrained water to drain from the mixture as the oil components of the sludge are absorbed in the petrophylic material;
Claim 2
Independent Claim
113 words
The method of converting oil and water containing sludge to dry waste comprising the steps of: 1. adding to the sludge petrophylic material selected from the group consisting of waste roofing felt and polyurethane fibers, in an amount sufficient to absorb the oily component of the sludge material; 2. adding to the mixture of sludge and petrophylic material fibrous material selected from the group consisting of fiberglass wastes, chopped glass fibers, Spanish moss, hay, straw and cornstalks in an amount sufficient to strengthen and bond the particles of petrophylic material; 3. allowing the entrained water to drain from the mixture as the oil components of the sludge are absorbed in the petrophylic material;
Claim 3
Dependent Claim
73 words
adding to the mixture a hydrophylic material selected from the group consisting of volcanic ash and bentonite in an amount sufficient to absorb and bond the remaining water in the mixture; 5. forming the mixture into suitably sized volumes or packages; and 6. coating the external surface of said packages with an air drying liquid selected from the group consisting of sodium silicate, and asphalt tar to form a water impervious layer thereon.
Claim 4
Dependent Claim
73 words
adding to the mixture a hydrophylic material selected from the group consisting of volcanic ash and bentonite in an amount sufficient to absorb and bond the remaining water in the mixture; 5. forming the mixture into suitably sized volumes or packages; and 6. coating the external surface of said packages with an air drying liquid selected from the group consisting of sodium silicate, and asphalt tar to form a water impervious layer thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |