Patent US5358356A successfully refreshed from Google Patents.
US5358356A
Expired / Lapsed
US
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Erosion control mat
Assignee: Propex Operating Co LLC
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Filing: 1993-07-29
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Granted: 1994-10-25
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Expires: 2013-07-29
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
2026-11-07 09:03
CPC Classifications
E; E02; E02D; E02D17/00; E02D17/20; E02D17/202
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
A composite fabric comprising a scrim of polypropylene having a weight in the range of from about 3 1/2 pounds per thousand square feet to about 1 pound per thousand square feet and having an open grid structure characterized by a grid opening size ranging from a maximum of about 1 inch to a minimum of about 1/16 inch; and a uniform lightweight web comprising polypropylene staple fibers having a denier in the range of about 60 to about 1 and staple length in the range of from about 7 inches to about 3/4 inches and having a weight in the range of from about 21/2 ounces per square yard to about 1/4 ounce per square yard secured to said scrim by needle-punching.
Claim 2
Dependent Claim
123 words
A composite fabric comprising a scrim of polypropylene having a weight in the range of from about 3 1/2 pounds per thousand square feet to about 1 pound per thousand square feet and having an open grid structure characterized by a grid opening size ranging from a maximum of about 1 inch to a minimum of about 1/16 inch; and a uniform lightweight web comprising polypropylene staple fibers having a denier in the range of about 60 to about 1 and staple length in the range of from about 7 inches to about 3/4 inches and having a weight in the range of from about 21/2 ounces per square yard to about 1/4 ounce per square yard secured to said scrim by needle-punching.
Claim 3
Dependent Claim
12 words
The composite fabric of claim 1 wherein the fabric is environmentally degradable.
References Cited (Backward Citations)
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US4023506A
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JPS6234361A
Cited
US4941282A
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US5033231A
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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) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |