US4897296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric for protective garments
Assignee: EIDP Inc
•
Filing: 1989-01-27
•
Granted: 1990-01-30
•
Expires: 2009-01-27
Abstract
Abstract An improved fabric is provided for use in a protective garment. The fabric has two composites seamed together. Each composite is formed from a spunbonded olefin which has been laminated to a three-layered thermoplastic film. Compared to a fabric with only one composite layer, various chemicals require more than 2.9 to more than 240 times as much time to penetrate the two-composite fabric of the invention.
Inventors
- 👤 Ben H. Marshall, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:43
CPC Classifications
A; A62; A62D; A62D5/00; A62B; A62B17/00; A62B17/006; B; B32; B32B; B32B27/00; B32B27/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/681
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
An improved fabric particularly suited for protective garments, the fabric having a composite of a spunbonded polyethylene film-fibril sheet laminated to a three-layered film of coextruded layers of low density polyethylene on both faces of a central film layer of a copolymer of vinyl chloride and vinylidine chloride, the improvement comprising the fabric consisting essentially of a first composite seamed to a second composite, the spunbonded sheet of the first composite being in contact and in face-to-face relationship throughout the fabric with the three-layered film of the second composite.
Claim 2
Dependent Claim
89 words
An improved fabric particularly suited for protective garments, the fabric having a composite of a spunbonded polyethylene film-fibril sheet laminated to a three-layered film of coextruded layers of low density polyethylene on both faces of a central film layer of a copolymer of vinyl chloride and vinylidine chloride, the improvement comprising the fabric consisting essentially of a first composite seamed to a second composite, the spunbonded sheet of the first composite being in contact and in face-to-face relationship throughout the fabric with the three-layered film of the second composite.
Claim 3
Dependent Claim
25 words
An improved fabric in accordance with claim 1 wherein the polyethylene layer on one face of the three-layered film includes a copolymer of ethylene vinylacetate.
Claim 4
Dependent Claim
56 words
An improved fabric in accordance with claim 1 or 2 wherein the thickness of the spunbonded sheet is in the range of 0.05 to 0.15 mm, the thickness of the three-layered film is in the range of 0.04 to 0.10 mm and the thickness of the composite is in the range of 0.1 to 0.3 mm.
Claim 5
Dependent Claim
21 words
An improved fabric in accordance with claim 1 or 2 wherein the composites are seamed together by an ultrasonically formed seam.
Claim 6
Dependent Claim
20 words
An improved fabric in accordance with claim 1 or 2 wherein the composites are seamed together by a sewing thread.
Claim 7
Dependent Claim
21 words
An improved fabric in accordance with claim 1 or 2 wherein the composites are seamed together by a thermally bonded seam.
Claim 8
Dependent Claim
13 words
A protective garment made with the improved fabric of claim 1 or 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |