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Patent US5249893A successfully refreshed from Google Patents.
US5249893A
Expired / Lapsed
US
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Erosion control mat
Assignee: Propex Fabrics Inc
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Filing: 1989-04-13
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Granted: 1993-10-05
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Expires: 2009-04-13
Abstract
Abstract A process and fabric for controlling soil erosion which comprises an erosion control mat formed of a scrim having a lightweight web secured thereto to be utilized by applying the erosion control mat to a soil surface. A method of producing such erosion control mat is also disclosed.
Inventors
- 👤 Gerald A. Romanek
- 👤 Roger E. Moon
- 👤 Mark L. Marienfield
- 👤 Sukhdev S. Guram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:25
CPC Classifications
E; E02; E02D; E02D17/00; E02D17/20; E02D17/202
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
A process for controlling erosion of a soil surface which comprises applying to said soil surface an erosion control mat formed of (a) a scrim having a grid sufficiently sized to provide (1) uniform reinforcing and (2) plant penetration through the grid and bonded to said scrim (b) a uniform, non-crosslapped, unconsolidated lightweight web weighing in the range of from about 21/2 ounces per square yard to about 1/4 ounce per square yard wherein the lightweight web will allow ready penetration of plants, light, and water thereby providing erosion control to said soil surface.
Claim 2
Dependent Claim
94 words
A process for controlling erosion of a soil surface which comprises applying to said soil surface an erosion control mat formed of (a) a scrim having a grid sufficiently sized to provide (1) uniform reinforcing and (2) plant penetration through the grid and bonded to said scrim (b) a uniform, non-crosslapped, unconsolidated lightweight web weighing in the range of from about 21/2 ounces per square yard to about 1/4 ounce per square yard wherein the lightweight web will allow ready penetration of plants, light, and water thereby providing erosion control to said soil surface.
Claim 3
Dependent Claim
59 words
The process of claim 1 wherein the scrim weighs in the range from about 31/2 pounds per thousand square feet to about 1 pound per thousand square feet wherein said scrim is characterized by an open grid structure having a grid size in the range from a maximum of about 1 inch to a minimum of about 1/16 inch.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein said scrim is made of a material selected from the group consisting of polypropylene, polyester, nylon, rayon, polyethylene, cotton, and combinations of any two or more thereof.
Claim 5
Dependent Claim
34 words
The process of claim 1 wherein the lightweight web is made of a material selected from the group consisting of polypropylene, polyester, nylon, rayon, polyethylene, cotton, and combinations of any two or more thereof.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the lightweight web is made of carded staple fibers.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein said lightweight web is secured to said scrim by needle-punching.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein the scrim is characterized by an open grid structure having a grid opening size in the range of from about 3/4 inch to about 5/8 inch.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein the erosion control mat is secured to a soil surface by fastening means.
Claim 10
Dependent Claim
19 words
The process of claim 8 wherein the fastening means is placed about the perimeter of the erosion control mat.
Claim 11
Dependent Claim
22 words
The process of claim 1 wherein the soil surface is seeded prior to applying the erosion control mat to the soil surface.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein after the erosion control mat is secured to the soil surface, the erosion control mat is watered.
Claim 13
Dependent Claim
141 words
A process for controlling soil surface erosion which comprises providing an erosion control mat formed of a scrim of polypropylene having a weight from about 2.9 pounds per thousand square feet to about 1 pound/thousand ft. 2 and an open grid structure having a grid size of from a maximum of about 1 inch to a minimum of about 1/16 inch having a uniform lightweight web of polypropylene staple fibers having a denier in the range of from about 60 to about 1 and staple length in the range of from about 7 inches to about 3/4 inch and a weight from about 21/2 ounces per square yard to about 1/4 ounce per square yard secured to said scrim by needle-punching, and securing said erosion control mat so formed to a soil surface thereby providing erosion control to said soil surface.
Claim 14
Dependent Claim
141 words
A process for controlling soil surface erosion which comprises providing an erosion control mat formed of a scrim of polypropylene having a weight from about 2.9 pounds per thousand square feet to about 1 pound/thousand ft. 2 and an open grid structure having a grid size of from a maximum of about 1 inch to a minimum of about 1/16 inch having a uniform lightweight web of polypropylene staple fibers having a denier in the range of from about 60 to about 1 and staple length in the range of from about 7 inches to about 3/4 inch and a weight from about 21/2 ounces per square yard to about 1/4 ounce per square yard secured to said scrim by needle-punching, and securing said erosion control mat so formed to a soil surface thereby providing erosion control to said soil surface.
Claim 15
Dependent Claim
19 words
The process of claim 12 wherein the erosion control mat is secured to a soil surface with fastening means.
Claim 16
Dependent Claim
19 words
The process of claim 13 wherein the fastening means is placed about the perimeter of the erosion control mat.
Claim 17
Dependent Claim
24 words
The process of claim 12 characterized further to include seeding the soil surface prior to securing the erosion control mat to a soil surface.
Claim 18
Dependent Claim
25 words
The process of claim 12 characterized further to include watering the erosion control mat after the erosion control mat is secured to a soil surface.
Claim 19
Dependent Claim
13 words
The process of claim 12 wherein the erosion control mat is environmentally degradable.
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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) | 1996-10-04 | 1997-04-05 | 1997-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-04 | 2001-04-05 | 2001-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-04 | 2005-04-05 | 2005-10-05 | $7700.00 | Window Closed / Lapsed |