US4099342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Footwear
Assignee: Purification Products Ltd
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Filing: 1977-07-19
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Granted: 1978-07-11
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Expires: 1997-07-19
Abstract
Abstract This invention relates to air-permeable insoles comprising a web or matt of fibres loaded with active carbon and held together by a binder disposed predominently at or near the surfaces of the web or matt, and at least one surface of said web or matt having a wear-resistant fabric bonded thereto by means of a discontinuous layer of binder extending from the surface of each of the wear-resistant fabrics into the surface of the web or matt.
Inventors
- 👤 Tej Kuldip Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:35
CPC Classifications
A; A43; A43B; A43B1/00; A43B1/0045; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A43B17/00; A43B17/10; A43B17/102; B32B27/32; B32B27/34; B32B3/00; B32B3/26; B32B3/266; B32B5/00; B32B5/02; B32B5/18; B32B5/22; B32B5/24; B32B5/245; B32B2264/00; B32B2264/10; B32B2264/107; B32B2264/108; B32B2307/00; B32B2307/50; B32B2307/554; B32B2307/70; B32B2307/724; B32B2323/00; B32B2323/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/24851; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
An air-permeable insole comprising a web or matt of fibres loaded with active carbon and held together by a binder disposed predominently at or near the surfaces of the web or matt, and at least one surface of said web or matt having a wear-resistant fabric bonded thereto by means of a discontinuous layer of binder extending from the surface of each of the wear-resistant fabrics into the surface of the web or matt.
Claim 2
Dependent Claim
74 words
An air-permeable insole comprising a web or matt of fibres loaded with active carbon and held together by a binder disposed predominently at or near the surfaces of the web or matt, and at least one surface of said web or matt having a wear-resistant fabric bonded thereto by means of a discontinuous layer of binder extending from the surface of each of the wear-resistant fabrics into the surface of the web or matt.
Claim 3
Dependent Claim
32 words
An air-permeable insole as claimed in claim 1, in which the discontinous layer of binder is formed from a melted reticular thermoplastic material having a lower melting point than the wear-resistant fabric.
Claim 4
Dependent Claim
33 words
An air-permeable insole as claimed in claim 2, in which the reticular material is a perforated sheet of thermoplastic material or is a woven or knitted fabric formed from thermoplastic filaments or yarns.
Claim 5
Dependent Claim
116 words
An air-permeable insole comprising a web or matt of fibres loaded with active carbon and held together by a binder disposed predominently at or near the surfaces of the web or matt, a layer of preformed open cell foam one surface of which is bonded to one surface of said web or matt by means of a discontinuous layer of binder extending from the surface area of the foam excluding the surface pores into the surface of the web or matt and a wear-resistant fabric bonded to the remaining surface of the foam by means of a discontinuous layer of binder which extends only over the surface area surrounding the surface pores of said remaining surface.
Claim 6
Dependent Claim
116 words
An air-permeable insole comprising a web or matt of fibres loaded with active carbon and held together by a binder disposed predominently at or near the surfaces of the web or matt, a layer of preformed open cell foam one surface of which is bonded to one surface of said web or matt by means of a discontinuous layer of binder extending from the surface area of the foam excluding the surface pores into the surface of the web or matt and a wear-resistant fabric bonded to the remaining surface of the foam by means of a discontinuous layer of binder which extends only over the surface area surrounding the surface pores of said remaining surface.
Claim 7
Dependent Claim
20 words
An air-permeable insole as claimed in claim 4, in which the wear-resistant fabric is replaced by a lightweight cotton cloth.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |