Patent US4926570A successfully refreshed from Google Patents.
US4926570A
Expired / Lapsed
US
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Shoe inner sole, particularly insole or welt
Assignee: Lohmann GmbH and Co KG
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Filing: 1988-07-20
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Granted: 1990-05-22
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Expires: 2008-07-20
Abstract
Abstract The invention relates to a shoe inner sole, particularly an insole or welt for working or safety shoes, with a binder and a non-woven fabric optionally containing fillers, for preventing electric charges to the shoe wearer, the non-woven fabric containing a fibrous blend with between approximately 1 to 10% by weight of electrically conductive fibres.
Inventors
- 👤 Manfred Fohst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:02
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/36; A43B17/00; A43B17/003; A43B17/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
46 words
Shoe inner sole, particularly insole or welt for working or safety shoes, with a binder and a non-woven fabric as well as antistatic additives, wherein the non-woven fabric comprises a mixture of fibers with between approximately 1 to 10% by weight of electrically conductive staple fibers.
Claim 2
Dependent Claim
46 words
Shoe inner sole, particularly insole or welt for working or safety shoes, with a binder and a non-woven fabric as well as antistatic additives, wherein the non-woven fabric comprises a mixture of fibers with between approximately 1 to 10% by weight of electrically conductive staple fibers.
Claim 3
Dependent Claim
32 words
Shoe inner sole according to claim 1, wherein the mixture of fibers of the non-woven fabric contains at least one fiber selected from the group consisting of synthetic, natural and semisynthetic fibers.
Claim 4
Dependent Claim
16 words
Shoe inner sole according to claim 1, wherein the conductive fibers contain at least one metal.
Claim 5
Dependent Claim
24 words
Shoe inner sole according to claim 1, wherein the conductive fibers have a titre of 1 to 18 and preferably 3 to 12 dtex.
Claim 6
Dependent Claim
22 words
Shoe inner sole according to claim 1, characterized in that the conductive fibers have a staple length of 20 to 80 mm.
Claim 7
Dependent Claim
41 words
Shoe inner sole according to claim 1, wherein the volume resistance through the sole when a voltage of 100 V is applied is below or in the range 1×10 5 ohm and is preferably equal to or below 1×10 4 ohm.
Claim 8
Dependent Claim
12 words
Shoe inner sole according to claim 1 wherein the binder is hydrophobic.
Claim 9
Dependent Claim
17 words
Shoe inner sole according to claim 1 wherein the binder contrains nitrile-butadiene rubber and/or styrene-butadiene rubber latex.
Claim 10
Dependent Claim
14 words
Shoe inner sole according to claim 1 wherein the sole contains a bactericidal agent.
Claim 11
Dependent Claim
11 words
Shoe inner sole according to claim 1, and further containing fillers.
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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) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |