US3985929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric for use in making footwear
Assignee: Bayer AG
•
Filing: 1974-11-01
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Granted: 1976-10-12
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Expires: 1994-11-01
Abstract
Abstract A non-woven fabric adapted for use in footwear is impregnated with a polymer prepared by polymerizing acrylic acid or methacrylic acid, mixtures thereof, or mixtures with other vinyl monomers in the presence of polyethylene oxide to improve its water absorption characteristics.
Inventors
- 👤 Wulf von Bonin
- 👤 Helmut Streigler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:45
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4382; D04H1/425; D04H1/4258; D04H1/4326; D04H1/4334; D04H1/435; D04H1/58; D04H1/587; D04H1/64; D04H1/645; D04H1/65; D04H1/43835; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T442/00; Y10T442/20; Y10T442/2361
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A process for the production of hydrophilic non-woven fabric adapted to be a base material for synthetic leather which comprises impregnating a non-woven fabric with a polymer and optionally a cross-linking agent, said polymer having been produced by polymerization of ethylenically unsaturated monomers including acrylic acid or methacrylic acid in the presence of polyethylene oxide, drying the resulting impregnated fabric, and optionally heating to cross-link the polymer.
Claim 2
Dependent Claim
67 words
A process for the production of hydrophilic non-woven fabric adapted to be a base material for synthetic leather which comprises impregnating a non-woven fabric with a polymer and optionally a cross-linking agent, said polymer having been produced by polymerization of ethylenically unsaturated monomers including acrylic acid or methacrylic acid in the presence of polyethylene oxide, drying the resulting impregnated fabric, and optionally heating to cross-link the polymer.
Claim 3
Dependent Claim
41 words
The process of claim 1, wherein the initially bonded non-woven fabric is impregnated with an aqueous solution containing a polymer produced by radical polymerization of acrylic acid in the presence of polyethylene oxide with a molecular weight between 400 and 3000.
Claim 4
Dependent Claim
20 words
The process of claim 1, wherein hexamethylol melamine pentamethyl ether is mixed with the polymer as an additional cross-linking agent.
Claim 5
Dependent Claim
20 words
A non-woven fabric impregnated with a polymer prepared by polymerizing acrylic acid or methacrylic acid while mixed with polyethylene oxide.
Claim 6
Dependent Claim
20 words
A non-woven fabric impregnated with a polymer prepared by polymerizing acrylic acid or methacrylic acid while mixed with polyethylene oxide.
Claim 7
Dependent Claim
26 words
The fabric of claim 4, wherein the polymer is prepared by polymerizing acrylic acid or methacrylic acid and an ethylenically unsaturated monomer mixed with polyethylene oxide.
Claim 8
Dependent Claim
12 words
The fabric of claim 4 coated with polyvinyl chloride or a polyurethane.
Claim 9
Dependent Claim
11 words
A shoe or boot lined with the fabric of claim 4.
Claim 10
Dependent Claim
29 words
The process of claim 1, wherein the polymer is produced by polymerization of acrylic acid or methacrylic acid with an ethylenically unsaturated monomer in the presence of polyethylene oxide.
References Cited (Backward Citations)
US3632417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |