Patent US3894944A successfully refreshed from Google Patents.
US4142969A
Expired / Lapsed
US
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Composition and process for selectively removing oleaginous products from water
Assignee: Citicorp North America Inc
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Filing: 1975-03-12
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Granted: 1979-03-06
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Expires: 1995-03-12
Abstract
Abstract This invention relates to a composition and method of removing oleaginous compounds from aqueous systems, both fresh and salt, by employing a composition comprising a volcanic glass and a fibrous material.
Inventors
- 👤 Richard S. Funk
- 👤 Donald W. Mogg
- 👤 David L. Ruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:32
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/681
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
An oleospecific hydrophobic composition comprising an intimate mixture of expanded volcanic glass consisting of perlite, a cellulosic fiber, and a water repellent sizing consisting of asphalt, wherein said glass is present in an amount by weight of about 73.9% and has a particle size in the range of -8 to +400 mesh in which a major portion thereof passes through a 14 mesh screen and is retained on a 200 mesh screen and in which said fiber is present in an amount by weight of about 19.9% in which no more than about 35% of said fiber is -200 mesh, and water repellent sizing is applied to at least said fiber in an amount of about 6.2% by weight of said composition.
Claim 2
Dependent Claim
122 words
An oleospecific hydrophobic composition comprising an intimate mixture of expanded volcanic glass consisting of perlite, a cellulosic fiber, and a water repellent sizing consisting of asphalt, wherein said glass is present in an amount by weight of about 73.9% and has a particle size in the range of -8 to +400 mesh in which a major portion thereof passes through a 14 mesh screen and is retained on a 200 mesh screen and in which said fiber is present in an amount by weight of about 19.9% in which no more than about 35% of said fiber is -200 mesh, and water repellent sizing is applied to at least said fiber in an amount of about 6.2% by weight of said composition.
Claim 3
Independent Claim
123 words
A method for sorbing oleaginous compounds comprising applying to the area where said oleaginous compounds are to be sorbed, an oleospecific hydrophobic composition comprising an intimate mixture of expanded volcanic glass consisting of perlite, and a cellulosic fiber wherein said glass is present in an amount by weight of about 73.9% and has a particle size in the range of -8 to +400 mesh in which a major portion thereof passes through a 14 mesh screen and is retained on a 200 mesh screen and in which said fiber is present in an amount by weight of about 19.9% in which no more than about 35% of said fiber is -200 mesh, and about 6.2 weight percent of asphalt as a sizing binder.
Claim 4
Independent Claim
123 words
A method for sorbing oleaginous compounds comprising applying to the area where said oleaginous compounds are to be sorbed, an oleospecific hydrophobic composition comprising an intimate mixture of expanded volcanic glass consisting of perlite, and a cellulosic fiber wherein said glass is present in an amount by weight of about 73.9% and has a particle size in the range of -8 to +400 mesh in which a major portion thereof passes through a 14 mesh screen and is retained on a 200 mesh screen and in which said fiber is present in an amount by weight of about 19.9% in which no more than about 35% of said fiber is -200 mesh, and about 6.2 weight percent of asphalt as a sizing binder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |