Patent US6347913B2 successfully refreshed from Google Patents.
US6347913B2
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Geotextile structure for filtration
Assignee: Solmax France SAS
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Filing: 1998-08-12
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Granted: 2002-02-19
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Expires: 2018-08-12
Abstract
Abstract A geotextile structure for filtering liquid from soil includes a lower layer of geotextile material for contacting soil for filtration thereof. The lower layer presents in its thickness a number of constrictions n included between 15 and 40, and is made of synthetic filaments or fibers presenting a count D wherein D is measured in units of decitex. An upper layer of geotextile material provides mechanical protection of the lower layer. The upper layer presents in its thickness constrictions more open than the constrictions of the lower layer to avoid clogging of the lower layer. The upper layer is made of synthetic filaments or fibers presenting a count at least equal to 2D. The upper and lower layers are bonded to each other.
Inventors
- 👤 Philippe Delmas
- 👤 Olivier Artieres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:03
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B2262/00; B32B2262/02; E; E02; E02D; E02D2300/00; E02D2300/0085; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A geotextile structure for filtering liguid from soil, comprising: a lower layer of geotextile material for contacting soil for filtration thereof, the lower layer presenting in its thickness a number of constrictions n included between 15 and 40 and made of synthetic filaments or fibers presenting a count D wherein D is measured in units of decitex; and an upper layer of geotextile material for mechanical protection of the lower layer, presenting in its thickness constrictions more open than the constrictions of the lower layer for avoiding clogging of the geotextile structure, and made of synthetic filaments or fibers presenting a count at least equal to 2D, said upper and lower layers being bonded to each other.
Claim 2
Dependent Claim
117 words
A geotextile structure for filtering liguid from soil, comprising: a lower layer of geotextile material for contacting soil for filtration thereof, the lower layer presenting in its thickness a number of constrictions n included between 15 and 40 and made of synthetic filaments or fibers presenting a count D wherein D is measured in units of decitex; and an upper layer of geotextile material for mechanical protection of the lower layer, presenting in its thickness constrictions more open than the constrictions of the lower layer for avoiding clogging of the geotextile structure, and made of synthetic filaments or fibers presenting a count at least equal to 2D, said upper and lower layers being bonded to each other.
Claim 3
Dependent Claim
22 words
The geotextile structure of claim 1 , wherein the number of constrictions of the lower layer is included between 20 and 35.
Claim 4
Dependent Claim
23 words
The geotextile structure of claim 1 , wherein the count of the filaments of the upper layer is included between 3D and 4D.
Claim 5
Dependent Claim
29 words
The geotextile structure of claim 1 , wherein the lower layer corresponds to about 3 to 5 decitex and the upper layer corresponds to about 12 to 20 decitex.
Claim 6
Dependent Claim
19 words
The geotextile structure of claim 1 , wherein said upper layer presents a mass adapted to a desired resistance.
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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) | 2005-02-18 | 2005-08-20 | 2006-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-02-18 | 2009-08-20 | 2010-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-02-18 | 2013-08-20 | 2014-02-19 | $7700.00 | Window Closed / Lapsed |