US4430811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Footwear
Assignee: HOZUMA OKADA 26-30 KINUGASASHITAMACHI RYUANJI UKYO-KU KYOTO-SHI KYOTO-KU JAPAN
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Filing: 1982-01-04
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Granted: 1984-02-14
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Expires: 2002-01-04
Abstract
Abstract A footwear such as shoes, boots, slippers etc., comprises a three-layered structure including an outer cover, an intermediate layer made of foamed urethane and an inner cover. The inner cover has a double-layered structure including first and second layer of fabric and the first and second layer are so combined as not only to show good absorption of the sweat emitted from the wearer's foot but also to keep the surface thereof held in contact to the foot dry.
Inventors
- 👤 Hozuma Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:13
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/07; A43B1/00; A43B1/02; A43B1/028; A43B1/04; A43B17/00; A43B17/10; A43B17/102; A43B23/02; A43B23/0205; A43B23/0235; A43B3/00; A43B3/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
Footwear comprising; an intermediate layer made of foamed urethane and having first and second opposite surfaces; an outer cover bonded to the first surface of the intermediate layer and so shaped as to cover at least a portion of the foot of a wearer; and an inner cover bonded to the second surface of the intermediate layer and held in position to contact the foot of the wearer when the footwear is in use; said inner cover being of a double-layered structure including first and second layers of fabric joined together, the first layer being a woven or knitted fabric and adapted to contact the wearer's foot and the second layer being bonded to the intermediate layer, the fabric of said first layer having a relatively high moisture permeability and a relatively low moisture holding capability whereas the fabric of said second layer has a relatively high moisture holding capability.
Claim 2
Dependent Claim
150 words
Footwear comprising; an intermediate layer made of foamed urethane and having first and second opposite surfaces; an outer cover bonded to the first surface of the intermediate layer and so shaped as to cover at least a portion of the foot of a wearer; and an inner cover bonded to the second surface of the intermediate layer and held in position to contact the foot of the wearer when the footwear is in use; said inner cover being of a double-layered structure including first and second layers of fabric joined together, the first layer being a woven or knitted fabric and adapted to contact the wearer's foot and the second layer being bonded to the intermediate layer, the fabric of said first layer having a relatively high moisture permeability and a relatively low moisture holding capability whereas the fabric of said second layer has a relatively high moisture holding capability.
Claim 3
Dependent Claim
20 words
Footwear according to claim 1, wherein said fabric of the second layer is a woven fabric or a knitted fabric.
Claim 4
Dependent Claim
32 words
Footwear according to claim 1, wherein said fabric of the first layer is made of a synthetic material selected from the group consisting of polyvinyl chloride, polyyester, nylon, polypropylene, vinylidene and vinylon.
Claim 5
Dependent Claim
29 words
Footwear according to claim 1, wherein said fabric of the second layer is made of a material selected from the group consisting of cupra, rayon, cotton, nylon, and acrylic.
Claim 6
Dependent Claim
24 words
Footwear according to claim 1, wherein said fabric of the first layer has meshes larger than that of said fabric of the second layer.
Claim 7
Dependent Claim
25 words
Footwear according to claim 1, wherein said fabric of the first layer is prepared from yarns having 30˜100 denyl and has 14˜50 wales per inch.
Claim 8
Dependent Claim
20 words
Footwear according to claim 1, wherein the yarn for the fabric of the second layer is larger than 40 denyl.
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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |