US5688073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth drains
Assignee: ALIDRAIN ASIA Sdn Bhd
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Filing: 1994-05-18
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Granted: 1997-11-18
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Expires: 2014-05-18
Abstract
Abstract An earth drain comprising a core consisting of an elongated flexible web having on at least one surface thereof, and preferably on both surfaces, an array of discreet projections spaced transversely across the width of the web, and longitudinally in the lengthwise orientation of the web. The array of projections is interrupted by a plurality of elongated projection-free zones extending in the longitudinal direction of the web, and spaced transversely across the width of the web. A filter of sheet-like water permeable material encases the core, and is adapted to be maintained in spaced relationship to the web by the free ends of the projections thereon.
Inventors
- 👤 Joseph Clement Brodeur
- 👤 Vicko M. Von Stedingk
- 👤 Mark E. Siemonsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:26
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005; E02D; E02D3/00; E02D3/02; E02D3/10; E02D31/00; E02D31/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
An earth drain comprising a core consisting of an elongated flexible web having on at least one surface thereof an array of spaced projections, each having a base end affixed to said web, and a free end spaced from said web, the projections of said array being evenly spaced in parallel rows extending longitudinally and transversely of said web and a filter of sheet-like water permeable material encasing said at least one surface and adapted to be maintained in spaced relationship to said web by the free ends of said projections, characterized in that said array of projections is interrupted by a plurality of transversely spaced elongated projection free zones extending longitudinally of said web, the dimensions of said projection free zones in the transverse and longitudinal directions of the web being greater than the spacing between adjacent projections.
Claim 2
Dependent Claim
139 words
An earth drain comprising a core consisting of an elongated flexible web having on at least one surface thereof an array of spaced projections, each having a base end affixed to said web, and a free end spaced from said web, the projections of said array being evenly spaced in parallel rows extending longitudinally and transversely of said web and a filter of sheet-like water permeable material encasing said at least one surface and adapted to be maintained in spaced relationship to said web by the free ends of said projections, characterized in that said array of projections is interrupted by a plurality of transversely spaced elongated projection free zones extending longitudinally of said web, the dimensions of said projection free zones in the transverse and longitudinal directions of the web being greater than the spacing between adjacent projections.
Claim 3
Dependent Claim
31 words
An earth drain as defined in claim 1, wherein said web is of uniform width, and array of projections is disposed on each surface thereof and said filter encases said core.
Claim 4
Dependent Claim
19 words
An earth drain as defined in claim 2, wherein said projection free zones extend the length of said core.
Claim 5
Dependent Claim
39 words
An earth drain as defined in claim 3, wherein said projection free zones are spaced at regular intervals transversely of said web, and adjacent projection free zones are spaced apart by at least two longitudinally extending rows of projections.
Claim 6
Dependent Claim
38 words
An earth drain as defined in claim 2, wherein said projection free zones are spaced at regular intervals transversely of said web and are longitudinally interrupted by transverse bands comprising at least one transversely extending row of projections.
Claim 7
Dependent Claim
21 words
An earth drain as claimed in claim 5, wherein said transverse bands extend without interruption across the width of the web.
Claim 8
Dependent Claim
21 words
An earth drain as defined in claim 6, wherein said transverse bands comprise at least two transversely extending rows of projections.
Claim 9
Dependent Claim
60 words
An earth drain as defined in claim 6, wherein the elongated projection free zones on one side of each band are laterally displaced one half the distance of the transverse spacing between the elongated projection free zones on the other side of the band to produce a staggered arrangement of said projection free zones throughout the length of the web.
Claim 10
Dependent Claim
62 words
An earth drain as defined in any of claims 1, 2, 3, 4, 5, 7, 8 or 6, wherein the projections in adjacent longitudinally and transversely extending rows are displaced a distance equal to one half the spacing between adjacent projections in a row, whereby rows of said projections in the longitudinal and transverse directions are staggered with respect to adjacent rows.
Claim 11
Dependent Claim
30 words
An earth drain as defined in claim 9, wherein the width of said projection free zones is equal to three times the transverse spacing of adjacent longitudinal rows of projections.
Claim 12
Dependent Claim
23 words
An earth drain as defined in claims 1, 2, 3, 4, 5, 7, 8 or 6 wherein said projections are of frusto-conical configuration.
References Cited (Backward Citations)
US3888087A
Cited
CA1015173A
Cited
CA1073227A
Cited
CA1230980A
Cited
US4622138A
Cited
US4733989A
Cited
US4840515A
Cited
US4943185A
Cited
US4925342A
Cited
US4956951A
Cited
US5383314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-17 | 2001-05-19 | 2001-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-17 | 2005-05-19 | 2005-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-17 | 2009-05-19 | 2009-11-18 | $7700.00 | Window Closed / Lapsed |