US4564552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas permeable, water and oil resistant composite structure
Assignee: Pall Corp
•
Filing: 1984-10-05
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Granted: 1986-01-14
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Expires: 2004-10-05
Abstract
Abstract A water and oil resistant, microporous article of footwear comprised of an inner and outer layer of fabric and an intermediate layer comprised of from about 60 to about 40 parts by weight of inorganic reinforcing microfibers, particularly glass, and from about 40 to about 60 parts by weight of a polymeric binding agent, preferably a copolymer of ethylene and vinyl acetate, the polymeric binding agent being in the form of a continuous matrix and derived from an emulsion or latex of particles of the binding agent, in which the particles are less than about 1 micrometer in size. A treating agent, preferably a fluorinated hydrocarbon, is present in the intermediate layer in an amount sufficient to render that layer hydrophobic and oleophobic.
Inventors
- 👤 Joseph G. Adiletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:14
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; A; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A41D31/102; B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B01D2239/00; B01D2239/04; B01D2239/0471; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996; Y10T442/00; Y10T442/30; Y10T442/3707
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
142 words
A water and oil resistant, microporous article of footwear comprising: (1) an outer layer of fabric; (2) an intermediate layer comprising (a) from about 60 to about 40 parts by weight of inorganic, reinforcing microfibers, (b) from about 40 to about 60 parts by weight of a polymeric binding agent in the form of a continuous matrix, said binding agent being derived from an emulsion or latex of particles of said binding agent having a size of less than one micrometer in a liquid, said binding agent and said microfibers being present in the intermediate layer in a total amount of 100 parts by weight, based on the weight of said binding agent and said microfibers, and (c) a treating agent present in an amount sufficient to render the intermediate layer both hydrophobic and oleophobic; and (3) an inner layer of fabric.
Claim 2
Dependent Claim
142 words
A water and oil resistant, microporous article of footwear comprising: (1) an outer layer of fabric; (2) an intermediate layer comprising (a) from about 60 to about 40 parts by weight of inorganic, reinforcing microfibers, (b) from about 40 to about 60 parts by weight of a polymeric binding agent in the form of a continuous matrix, said binding agent being derived from an emulsion or latex of particles of said binding agent having a size of less than one micrometer in a liquid, said binding agent and said microfibers being present in the intermediate layer in a total amount of 100 parts by weight, based on the weight of said binding agent and said microfibers, and (c) a treating agent present in an amount sufficient to render the intermediate layer both hydrophobic and oleophobic; and (3) an inner layer of fabric.
Claim 3
Dependent Claim
40 words
The composite structure of claim 1 having a porosity of about 0.01 to about 100 cubic feet of air per square foot of surface area per minute at a pressure of 0.5 inches WC and a temperature of 20° C.
Claim 4
Dependent Claim
14 words
The composite structure of claim 2 wherein said inorganic, reinforcing microfibers comprise glass microfibers.
Claim 5
Dependent Claim
20 words
The composite structure of claim 2 wherein said inorganic, reinforcing microfibers comprise a mixture of potassium titanate and glass microfibers.
Claim 6
Dependent Claim
19 words
The composite structure of claim 2 wherein said polymeric binding agent is a copolymer of ethylene and vinyl acetate.
Claim 7
Dependent Claim
27 words
The composite structure of claim 2 wherein said polymeric binding agent is a copolymer of ethylene and vinyl acetate and wherein said copolymer has chlorinated side chains.
Claim 8
Dependent Claim
25 words
The composite structure of claim 2 wherein said polymeric binding agent comprises from about 50 to about 60 parts by weight of said intermediate layer.
Claim 9
Dependent Claim
14 words
The composite structure of claim 2 wherein said treating agent comprises a fluorinated hydrocarbon.
Claim 10
Dependent Claim
20 words
The composite structure of claim 2 wherein said porosity is in the range of from about 0.1 to about 20.
Claim 11
Dependent Claim
37 words
The composite structure of claim 2 wherein said inorganic reinforcing microfibers are glass and have diameters within the range of from about 0.5 to about 2.0 micrometers and aspect ratios of from about 20:1 to about 1,000:1.
Claim 12
Dependent Claim
20 words
The composite structure of claim 1 wherein said outer layer of fabric is a polypropylene, a polyester, cotton or rayon.
Claim 13
Dependent Claim
16 words
The composite structure of claim 11 wherein said inner layer of fabric is a nonwoven polypropylene.
Claim 14
Dependent Claim
20 words
The composite structure of claim 12 wherein said intermediate layer is integral with said inner and outer layers of fabric.
Claim 15
Dependent Claim
14 words
The composite structure of claim 1 wherein the polymeric binding agent is fire resistant.
Claim 16
Dependent Claim
20 words
The composite structure of claim 1 wherein said inner and outer layers of fabric each comprise multiple layers of fabric.
Claim 17
Dependent Claim
15 words
The composite structure of claim 6 wherein the intermediate layer is irradiated by Gamma radiation.
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |