Patent US3874177A successfully refreshed from Google Patents.
US3874177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pocket mat
Assignee: Nicolon BV
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Filing: 1973-06-11
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Granted: 1975-04-01
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Expires: 1993-06-11
Abstract
Abstract A mat for use in covering a slope or bank of a waterway, and comprising a web of synthetic yarn, said fabric being permeable to water, but impermeable to sand and earth, and a plurality of pockets succeeding one another in the longitudinal direction of the web and each extending over a transverse portion of said web, said pockets having rear walls constituted by said web of fabric, and in use being in contact with the ground, and said pockets being further constituted by a second web of fabric, which is interwoven with the web first-mentioned to form a double cloth, both in transverse narrow strips extending between each adjacent pair of pockets substantially throughout said transverse portion, and in a continuous longitudinal narrow strip interconnecting a marginal portion of said second web with the web firstmentioned.
Inventors
- 👤 Winter Jan Gerrit De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:32
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122; E02B3/127; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24752; Y10T428/2476
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
256 words
A mat for use in covering a slope or bank of a waterway comprising: a filtering web of woven, water-resistant, synthetic fabric, said fabric being permeable to water but impermeable to soil particles such as sand and earth, and a second web of woven synthetic fabric spanning said filtering web, said second web being narrower than said filtering web whereby one edge of said filtering web lies beyond the corresponding one edge of the second web across the span of the mat, the opposite edge of the second web being interwoven with the filtering web in a strip extending across the span of the mat, said second web also being interwoven with said filtering web in strips spaced across the span of the mat and extending from the first-mentioned strip to said one edge of said second web, thereby forming a series of pockets across the span of the mat which have open ends facing said one edge of the filtering web, whereby said mat can be disposed on a surface to be covered with the filtering web in contact therewith and with said pockets accessible from the exposed side of said mat and from locations intermediate the edges of said filtering web, and the unit number of those threads extending from edge to edge of the second web being lower than the like oriented threads of the filtering web whereby, with said webs interwoven as aforesaid, said second web will be bulged away from said filtering web to thereby increase the capacity of said pockets.
Claim 2
Dependent Claim
256 words
A mat for use in covering a slope or bank of a waterway comprising: a filtering web of woven, water-resistant, synthetic fabric, said fabric being permeable to water but impermeable to soil particles such as sand and earth, and a second web of woven synthetic fabric spanning said filtering web, said second web being narrower than said filtering web whereby one edge of said filtering web lies beyond the corresponding one edge of the second web across the span of the mat, the opposite edge of the second web being interwoven with the filtering web in a strip extending across the span of the mat, said second web also being interwoven with said filtering web in strips spaced across the span of the mat and extending from the first-mentioned strip to said one edge of said second web, thereby forming a series of pockets across the span of the mat which have open ends facing said one edge of the filtering web, whereby said mat can be disposed on a surface to be covered with the filtering web in contact therewith and with said pockets accessible from the exposed side of said mat and from locations intermediate the edges of said filtering web, and the unit number of those threads extending from edge to edge of the second web being lower than the like oriented threads of the filtering web whereby, with said webs interwoven as aforesaid, said second web will be bulged away from said filtering web to thereby increase the capacity of said pockets.
Claim 3
Dependent Claim
52 words
A mat according to claim 1 wherein, in locations corresponding to the open ends of said pockets, there are unwoven strips extending lengthwise of and in both said filtering web and said second web anD forming looplike means through which closure members for the open ends of said pockets can be introduced.
Claim 4
Dependent Claim
53 words
A mat according to claim 1 wherein, at the edge of said second web coincident with the open ends of said pockets, the threads extending in the direction of said edge are of a different color than those employed elsewhere in the mat and thereby visually identify the open ends of the pockets.
Claim 5
Dependent Claim
41 words
A mat according to claim 1 wherein said second web is interwoven with said filtering web at locations corresponding to the sides of said pockets and at the open ends thereof, thereby inhibiting the removal of material introduced into said pockets.
Claim 6
Dependent Claim
65 words
A mat according to claim 1 wherein, in alternate ones of the spaced strips in which the filtering web and the second web are interwoven, provision is made for movement of said second web relative to said filtering web, whereby the size of one of the two pockets bounding each said strip can be increased at the expense of the other pocket bounding the strip.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |