US5079792A
Expired / Lapsed
US
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Absorbent element for non-aqueous liquids
Assignee: ENGICOM E JACQMAINLAAN 162 BUS 55 B - 1210 BRUSSEL (BELGIUM) NV
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Filing: 1989-07-12
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Granted: 1992-01-14
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Expires: 2009-07-12
Abstract
Abstract Absorbent element, characterized in that it principally consists of at least two layers (1, 2, 6) of which one layer (1), which is destined to be brought into direct contact with the product to be absorbed, primarily consists of a strongly liquid absorbing hydrophobic material.
Inventors
- 👤 Eduard J. D'Haen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:02
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/32; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/237; Y10T428/239; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249986; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T428/30; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/676; Y10T442/679
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
89 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of said non-aqueous components whilst absorbing a minimum amount of said aqueous components; and (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough.
Claim 2
Dependent Claim
89 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of said non-aqueous components whilst absorbing a minimum amount of said aqueous components; and (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough.
Claim 3
Dependent Claim
19 words
An absorbent element according to claim 1, wherein said first absorbent layer is made of a non-woven polyolefin-based material.
Claim 4
Dependent Claim
17 words
An absorbent element according to claim 1, wherein said first absorbent layer is made of polypropylene fiber.
Claim 5
Dependent Claim
15 words
An absorbent element according to claim 1, wherein said protective layer is made of plastic.
Claim 6
Dependent Claim
16 words
An absorbent element according to claim 1, wherein said protective layer is made of plastic foil.
Claim 7
Dependent Claim
20 words
An absorbent element according to claim 1, wherein said first absorbent layer consists essentially of a non-woven polyolefin based material.
Claim 8
Dependent Claim
29 words
An absorbent element according to claim 1, wherein said protective layer is produced in the form of a reversible envelope capable of being reversed to sealably encase said element.
Claim 9
Dependent Claim
16 words
An absorbent element according to claim 1, wherein said first absorbent layer is provided with pleats.
Claim 10
Dependent Claim
112 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of non-aqueous components whilst absorbing a minimum amount of aqueous components; (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough; and (c) a second absorbent layer of liquid-absorbing and retaining active carbon, said second absorbent layer being interposed between said first layer and said protective layer.
Claim 11
Dependent Claim
112 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of non-aqueous components whilst absorbing a minimum amount of aqueous components; (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough; and (c) a second absorbent layer of liquid-absorbing and retaining active carbon, said second absorbent layer being interposed between said first layer and said protective layer.
Claim 12
Dependent Claim
21 words
An absorbent element according to claim 9, wherein said second absorbent layer comprises carbon granules surrounded by a porous polyester pellicle.
Claim 13
Dependent Claim
18 words
An absorbent element according to claim 9, wherein said second absorbent layer is made of activated carbon felt.
Claim 14
Dependent Claim
16 words
An absorbent element according to claim 9, wherein said layers are supported on a fabric mitten.
Claim 15
Dependent Claim
17 words
An absorbent element according to claim 9, wherein said second absorbing layer consists essentially of pure charcoal.
Claim 16
Dependent Claim
96 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of non-aqueous components whilst absorbing a minimum amount of aqueous components; and (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough, wherein said protective layer is made of butyl rubber.
Claim 17
Dependent Claim
96 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of non-aqueous components whilst absorbing a minimum amount of aqueous components; and (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough, wherein said protective layer is made of butyl rubber.
Claim 18
Dependent Claim
121 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of non-aqueous components whilst absorbing a minimum amount of aqueous components; and (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough, wherein said protective layer is made of a plastic foil comprising a laminate which comprises at least three layers, the middle layer being made of polyvinylidenechloride and being responsible for the barrier properties thereof.
Claim 19
Dependent Claim
121 words
An absorbent element for absorbing liquids comprising: (a) a first absorbent layer made of a strongly hydrophobic liquid-absorbing material for making direct contact with a liquid having aqueous components and non-aqueous components, said first absorbent layer having the characteristic of being able to absorb a maximum amount of non-aqueous components whilst absorbing a minimum amount of aqueous components; and (b) a protective layer backing said first absorbent layer and made of a barrier material which is able to substantially completely prevent passage of the absorbed liquid therethrough, wherein said protective layer is made of a plastic foil comprising a laminate which comprises at least three layers, the middle layer being made of polyvinylidenechloride and being responsible for the barrier properties thereof.
Claim 20
Independent Claim
109 words
A method of absorbing liquids comprising the steps of: (a) directly contacting a first side of a an element with a liquid having aqueous components and non-aqueous components, said first side of said element comprising a first absorbent layer made of a strongly hydrophobic liquid-absorbent material; (b) absorbing a maximum amount of said non-aqueous components whilst absorbing a minimum amount of said aqueous components; and (c) substantially completely preventing passage of the absorbed non-aqueous components through a second side of said element by contacting the absorbed non-aqueous liquid with a second layer which comprises a barrier material separating said first absorbent layer from said second side of said element.
Claim 21
Independent Claim
109 words
A method of absorbing liquids comprising the steps of: (a) directly contacting a first side of a an element with a liquid having aqueous components and non-aqueous components, said first side of said element comprising a first absorbent layer made of a strongly hydrophobic liquid-absorbent material; (b) absorbing a maximum amount of said non-aqueous components whilst absorbing a minimum amount of said aqueous components; and (c) substantially completely preventing passage of the absorbed non-aqueous components through a second side of said element by contacting the absorbed non-aqueous liquid with a second layer which comprises a barrier material separating said first absorbent layer from said second side of said element.
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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) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |