Patent US4930101A successfully refreshed from Google Patents.
US4337007A
Expired / Lapsed
US
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Underwater erosion control structure
Assignee: Imperial Chemical Industries Ltd
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Filing: 1980-03-25
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Granted: 1982-06-29
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Expires: 2000-03-25
Abstract
Abstract An erosion and scour control structure for laying on a sea or river bed comprising a spaced array of longer fronds of filaments with a density less than that of water and an interspersed array of shorter filaments, preferably having a density greater than that of water, both arrays being attached to base.
Inventors
- 👤 Robert A. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:33
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/043
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
An erosion and scour control structure comprising a spaced array of filaments the improvement being that the spaced array consists of an array of longer fronds of filaments with a density less than that of water and an interspersed array of shorter filaments having a density greater than that of water, both arrays being attached to a base for laying on a sea or river bed.
Claim 2
Dependent Claim
66 words
An erosion and scour control structure comprising a spaced array of filaments the improvement being that the spaced array consists of an array of longer fronds of filaments with a density less than that of water and an interspersed array of shorter filaments having a density greater than that of water, both arrays being attached to a base for laying on a sea or river bed.
Claim 3
Dependent Claim
20 words
An erosion and scour control structure as claimed in claim 1 in which the shorter filaments are of crimped polyester.
Claim 4
Dependent Claim
20 words
An erosion and scour control structure as claimed in claim 1 in which the shorter filaments are bunched into fronds.
Claim 5
Dependent Claim
22 words
An erosion and scour control structure as claimed in claim 1 in which the longer fronds are formed of fibrillated polypropylene tape.
Claim 6
Dependent Claim
20 words
An erosion and scour control structure as claimed in claim 1 in which the base is a rigid metal mesh.
Claim 7
Dependent Claim
23 words
An erosion and scour control structure as claimed in claim 1 in which the base has been formed by weaving reinforced plastic strips.
Claim 8
Dependent Claim
20 words
An erosion and scour control structure as claimed in claim 1 in which the base is a flexible woven fabric.
Claim 9
Dependent Claim
23 words
An erosion and scour control structure as claimed in claim 1 in which the base has been formed by weaving unreinforced plastic strips.
Claim 10
Dependent Claim
20 words
An erosion and scour control stucture as claimed in claim 1 in which the base is a flexible non-woven fabric.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |