Patent US5445874A successfully refreshed from Google Patents.
US5445874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproof, blood-proof and virus-proof breathable laminates
Assignee: Fabrite Scientific Corp
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Filing: 1993-05-10
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Granted: 1995-08-29
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Expires: 2013-05-10
Abstract
Abstract The present relates to laminates which are waterproof blood-proof and virus-proof with a very high moisture vapor transmission rate. The laminate includes a woven or non-woven fabric and an extruded film of 60-70% butylene terephthalate units and the balance a polyester glycol.
Inventors
- 👤 Hussein A. Shehata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:33
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; A; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A41D31/102; A41D31/30; A41D31/305; A61; A61B; A61B46/00; A61B46/40; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/0261; B32B2262/0276; B32B2262/0284; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/726; B32B2307/7265; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/3862; Y10T442/40; Y10T442/60; Y10T442/674
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A protective laminate comprising (i) a woven or non-woven fabric and (ii) an extruded film of a hard segment of from 60 to 70% butylene terephthalate units and the balance a soft segment of polyetherdiol terephthalate, a first layer of said fabric and a second layer of said fabric said film being laminated between said first and second layers of fabric.
Claim 2
Dependent Claim
61 words
A protective laminate comprising (i) a woven or non-woven fabric and (ii) an extruded film of a hard segment of from 60 to 70% butylene terephthalate units and the balance a soft segment of polyetherdiol terephthalate, a first layer of said fabric and a second layer of said fabric said film being laminated between said first and second layers of fabric.
Claim 3
Dependent Claim
73 words
A protective laminate comprising (i) a woven or non-woven fabric and (ii) a hard segment of an extruded film of 60-70% butylene terephthalate units and the balance a soft segment of polyetherdiol terephthalate, the film being laminated to the fabric with a polyester- or polyether-polyurethane adhesive which has been pre-treated with an epoxy or carbodiimide wherein said adhesive has a ratio of polyester or polyether to carbodiimide or epoxy to polyurethane of 6:2:1.
Claim 4
Dependent Claim
73 words
A protective laminate comprising (i) a woven or non-woven fabric and (ii) a hard segment of an extruded film of 60-70% butylene terephthalate units and the balance a soft segment of polyetherdiol terephthalate, the film being laminated to the fabric with a polyester- or polyether-polyurethane adhesive which has been pre-treated with an epoxy or carbodiimide wherein said adhesive has a ratio of polyester or polyether to carbodiimide or epoxy to polyurethane of 6:2:1.
Claim 5
Dependent Claim
12 words
The laminate of claim 2 wherein said carbodiimide is 2,2',6,6' tetraisopropyldiphenyl carbodiimide.
Claim 6
Dependent Claim
21 words
The laminate of claim 2 wherein said film has a moisture vapor transmission rate of at least 600 g/m 2 /day.
Claim 7
Dependent Claim
23 words
The laminate of claim 2 wherein said fabric is selected from the group comprising polyester, nylon, tricot knit nylon, brushed polyester, and polypropylene.
References Cited (Backward Citations)
US4908260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |