Patent US4135843A successfully refreshed from Google Patents.
US4135843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erosion control mat
Assignee: Construction Techniques Inc
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Filing: 1977-07-21
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Granted: 1979-01-23
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Expires: 1997-07-21
Abstract
Abstract An erosion control mat of textile material formed of a series of contiguous frame units each comprising a tubular perimeter adapted to be filled with concrete and a center area circumscribed by the tubular perimeter, provided with filter means capable of preventing the loss of erodible material from the center area while permitting the cultivation of plant life within the center area.
Inventors
- 👤 Tomoji Umemoto
- 👤 Yukichi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:56
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122; E02B3/127
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
An erosion control mat of textile material comprising an integrated arrangement of frame units, each unit, forming in cooperation with adjacent frame units a tubular perimeter, hardened cementitious material filling said tubular perimeter, each unit having a generally open center area defined by said tubular perimeter, said center area being provided with filter means effective to prevent the egress of erodible matter while being sufficiently open in structure to permit the cultivation of seeds and seedlings.
Claim 2
Dependent Claim
76 words
An erosion control mat of textile material comprising an integrated arrangement of frame units, each unit, forming in cooperation with adjacent frame units a tubular perimeter, hardened cementitious material filling said tubular perimeter, each unit having a generally open center area defined by said tubular perimeter, said center area being provided with filter means effective to prevent the egress of erodible matter while being sufficiently open in structure to permit the cultivation of seeds and seedlings.
Claim 3
Dependent Claim
40 words
The erosion control mat defined in claim 1 wherein said filter means comprises a series of generally parallel, unwoven textile strands extending from a first section of tubular perimeter across said center area to a second section of tubular perimeter.
Claim 4
Dependent Claim
24 words
The erosion control mat defined in claim 2 wherein said textile strands are extensions of weft or warp strands embodied in said tubular perimeter.
Claim 5
Dependent Claim
58 words
The erosion control mat defined in claim 1 wherein said tubular perimeters are rectangular in shape and said filter means comprises a series of unwoven textile strands extending from a section of tubular perimeter forming one side of said rectangle, across said center area, and to the section of tubular perimeter forming the opposite side of said rectangle.
Claim 6
Dependent Claim
37 words
The erosion control mat defined in claim 4 wherein said filter means further comprises a second series of unwoven textile strands extending across said center area at right angles to said first mentioned series of textile strands.
Claim 7
Dependent Claim
126 words
An erosion control mat of textile material formed of warp and weft textile strands, adapted to be installed on earth, sand or other erodible matter, comprising an integrated arrangement of frame units, each unit forming in cooperation with adjacent frame units a tubular perimeter of woven warp and weft strands adapted to be filled with and to contain fluid cementitious material, each unit having a generally open center area defined by said tubular perimeter, said center area being provided with filter means formed of unwoven textile strands which are continuations of said warp strands, said weft strands or both, whereby said center areas are effective to prevent the egress of erodible matter while being sufficiently open in structure to permit the cultivation of seeds and seedlings.
Claim 8
Dependent Claim
126 words
An erosion control mat of textile material formed of warp and weft textile strands, adapted to be installed on earth, sand or other erodible matter, comprising an integrated arrangement of frame units, each unit forming in cooperation with adjacent frame units a tubular perimeter of woven warp and weft strands adapted to be filled with and to contain fluid cementitious material, each unit having a generally open center area defined by said tubular perimeter, said center area being provided with filter means formed of unwoven textile strands which are continuations of said warp strands, said weft strands or both, whereby said center areas are effective to prevent the egress of erodible matter while being sufficiently open in structure to permit the cultivation of seeds and seedlings.
Claim 9
Dependent Claim
17 words
The erosion control mat defined in claim 6 wherein said filter means consists of unwoven warp strands.
Claim 10
Dependent Claim
17 words
The erosion control mat defined in claim 6 wherein said filter means consists of unwoven weft strands.
Claim 11
Dependent Claim
21 words
The erosion control mat defined in claim 6 wherein said filter means consists of crossed but unwoven warp and weft strands.
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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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |