US5669796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geogrid composed of polyethylene terephthalate and polyolefin bicomponent fibers
Assignee: Performance Fibers Operations Inc
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Filing: 1995-11-02
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Granted: 1997-09-23
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Expires: 2015-11-02
Abstract
Abstract This invention claims a warp knit, weft inserted geogrid fabric without a topcoat, comprising a bicomponent fiber having filaments each with a sheath of a polyolefin material and about 0.5 to about 2 weight percent carbon black and a core of polyethylene terephthalate.
Inventors
- 👤 Debra W. Harford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:23
CPC Classifications
D; D04; D04B; D04B21/00; D04B21/14; D04B21/16; D01; D01F; D01F8/00; D01F8/04; D01F8/06; D01F8/14; D03; D03D; D03D15/00; D03D15/20; D03D15/283; D03D15/292; D03D15/50; D03D15/573; D03D15/587; D03D9/00; D10; D10B; D10B2101/00; D10B2101/10; D10B2101/12; D10B2321/00; D10B2321/02; D10B2321/021; D10B2321/022; D10B2331/00; D10B2331/04; D10B2505/00; D10B2505/20; D10B2505/204; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3179; Y10T442/3301; Y10T442/3317; Y10T442/40; Y10T442/45; Y10T442/456; Y10T442/463
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A heat bonded geogrid fabric comprising a woven or warp knit, weft inserted grid, said fabric comprising a bicomponent fiber with filaments each having a sheath of an adhesive polyolefin material comprising a polyolefin and an adhesive and containing about 0.5 weight percent to about 2 weight percent carbon black and a core of polyethylene terephthalate having an intrinsic viscosity of at least 0.89 deciliters per gram as determined from a solvent base of orthochlorophenol at 25° C.
Claim 2
Dependent Claim
78 words
A heat bonded geogrid fabric comprising a woven or warp knit, weft inserted grid, said fabric comprising a bicomponent fiber with filaments each having a sheath of an adhesive polyolefin material comprising a polyolefin and an adhesive and containing about 0.5 weight percent to about 2 weight percent carbon black and a core of polyethylene terephthalate having an intrinsic viscosity of at least 0.89 deciliters per gram as determined from a solvent base of orthochlorophenol at 25° C.
Claim 3
Dependent Claim
15 words
A heat bonded geogrid fabric of claim 1 wherein said polyolefin is polyethylene or polypropylene.
Claim 4
Dependent Claim
14 words
A heat bonded geogrid fabric of claim 1 wherein said adhesive is maleic anhydride.
Claim 5
Dependent Claim
15 words
A heat bonded geogrid fabric according to claim 2 wherein the adhesive is maleic anhydride.
Claim 6
Dependent Claim
17 words
A heat bonded geogrid fabric according to claim 4 wherein the polyolefin is linear low density polyethylene.
Claim 7
Dependent Claim
21 words
A heat bonded geogrid fabric according to claim 2 wherein the polyolefin is linear low density polyethylene or high density polyethylene.
Claim 8
Dependent Claim
17 words
A heat bonded geogrid fabric according to claim 6 wherein the polyolefin is linear low density polyethylene.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 2000-09-22 | 2001-03-24 | 2001-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-22 | 2005-03-24 | 2005-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-22 | 2009-03-24 | 2009-09-23 | $7700.00 | Window Closed / Lapsed |