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US5098421A Expired / Lapsed US ⏱️ 0.0 years remaining

Viscoelastic gel foot padding and medicating device

Assignee: Individual
•
Filing: 1989-10-16
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Granted: 1992-03-24
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Expires: 2009-10-16
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Abstract

Abstract A padding and medicating device for the human foot comprising a sheet structure, preferably of an elastic fabric material and partially coated on one surface with a pressure sensitive adhesive, in combination with a pad of viscoelastic gelatinous material impregnated onto a portion of the same surface of the sheet structure as the pressure sensitive adhesive. The pad of viscoelastic gelatinous material is preferably made with an oleaginous plasticizer such as Mineral Oil USP, and may contain one or more pharmacologically active agents. The sheet structure is oil impervious or a separating layer of material impervious to the oleaginous plasticizer is incorporated on either surface of the sheet structure adjacent to the area of the sheet structure to be impregnated with the viscoelastic gelatinous material to prevent the oleaginous plasticizer from bleeding onto the sock or shoe of the wearer. Ideally the viscoelastic gelatinous material is thermoplastic, ultrasoft, able to stretch to many times its relaxed dimensions without tearing, and capable of bleeding a significant amount of a liquid hydrocarbon plasticizer such as Mineral Oil USP onto the skin of the wearer. The present invention can also function as a blister dressing which is able to internally absorb horizontal shearing forces when the gel is employed in thin layers. An alternative embodiment comprising only the viscoelastic gel molded into the shape of a toe spacer, crest pad, corn or bunion pad and the like is also contemplated.

Inventors

  • 👤 Gerald P. Zook

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 12:27
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/06; A61F13/063; A61F2013/00361; A61F2013/00365; A61F2013/00387; A61F2013/00395; A61F2013/00404; A61F2013/00902; A61F2013/0091

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 62 words
A padding and medicating device for the human foot, comprising: a. a layer of flexible material which is impervious to oil; b. a layer of permeable material attached to said layer of oil-impervious material; and c. a layer of gelatinous viscoelastic padding material having an oleaginous plasticizer fraction derived from petroleum, said padding material being impregnated onto said layer of permeable material.
Claim 2
Dependent Claim 62 words
A padding and medicating device for the human foot, comprising: a. a layer of flexible material which is impervious to oil; b. a layer of permeable material attached to said layer of oil-impervious material; and c. a layer of gelatinous viscoelastic padding material having an oleaginous plasticizer fraction derived from petroleum, said padding material being impregnated onto said layer of permeable material.
Claim 3
Dependent Claim 54 words
The padding and medicating device, as recited in claim 1, wherein said layer of material which is impervious to oil is formed to include a peripheral border which extends beyond the gelatinous viscoelastic padding material, said peripheral border accommodating an increased dimension of the gelatinous viscoelastic padding material as created by external pressure thereupon.
Claim 4
Dependent Claim 33 words
The padding and medicating device, as recited in claim 1, wherein the layer of gelatinous viscoelastic padding material is attached to the layer of permeable material directly opposing the layer of oil-impervious material.
Claim 5
Dependent Claim 31 words
The padding and medicating device, as recited in claim 1, wherein the gelatinous viscoelastic padding material is a thermoplastic and is impregnated onto said layer of permeable material by thermoplastic means.
Claim 6
Dependent Claim 23 words
The padding and medicating device, as recited in claim 1, wherein said oleaginous plasticizer fraction derived from petroleum contains a pharmacologically active substance.
Claim 7
Dependent Claim 22 words
The padding and medicating device, as recited in claim 1, wherein said oleaginous plasticizer fraction derived from petroleum is Mineral Oil U.S.P.
Claim 8
Dependent Claim 17 words
The padding and medicating device, as recited in claim 1, wherein said padding material varies in thickness.
Claim 9
Dependent Claim 18 words
The padding and medicating device, as recited in claim 1, wherein said padding material is of uniform thickness.
Claim 10
Dependent Claim 78 words
A padding and medicating device for the human foot, comprising: a. a sheet of flexible fabric; b. a layer of material which is impervious to oil and is attached to said layer of flexible fabric; c. a layer of permeable material which is attached to said layer of oil-impervious material; and d. a layer of gelatinous viscoelastic padding material having an oleaginous plasticizer fraction derived from petroleum, said padding material being impregnated onto said layer of permeable material.
Claim 11
Dependent Claim 78 words
A padding and medicating device for the human foot, comprising: a. a sheet of flexible fabric; b. a layer of material which is impervious to oil and is attached to said layer of flexible fabric; c. a layer of permeable material which is attached to said layer of oil-impervious material; and d. a layer of gelatinous viscoelastic padding material having an oleaginous plasticizer fraction derived from petroleum, said padding material being impregnated onto said layer of permeable material.
Claim 12
Dependent Claim 20 words
The padding and medicating device, as recited in claim 9, wherein the sheet of flexible fabric is elastic in nature.
Claim 13
Dependent Claim 27 words
The padding and medicating device, as recited in claim 9, wherein the layer of oil-impervious material is semi-rigid so as to impart a contour to said device.
Claim 14
Dependent Claim 31 words
The padding and medicating device, as recited in claim 1, wherein the oleaginous plasticizer fraction derived from petroleum is a liquid hydrocarbon having from 15 to 24 carbon atoms per molecule.

References Cited (Backward Citations)

US1630596A Cited
US2432541A Cited
US3783869A Cited
US4787888A Cited
US4842931A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-03-24 1995-09-23 1996-03-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-03-24 1999-09-23 2000-03-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-03-24 2003-09-23 2004-03-24 $7700.00 Window Closed / Lapsed

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