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US4069601A Expired / Lapsed US ⏱️ 0.0 years remaining

Thong footwear

Assignee: YOUNG CALIFORNIAN SHOES Inc
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Filing: 1976-12-23
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Granted: 1978-01-24
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Expires: 1996-12-23
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Abstract

Abstract An article of footwear including a platform, an upper vamp, a bottom sole and an insole. The platform includes first and second uniformly thick layers of foam rubber having a given density extending throughout the toe and heel portions of the platform, and a third layer of foam rubber having a greater density positioned between the first and second layers in the heel portion of the platform and terminating in a wedge pointing away from the heel portion for providing a platform in which the bottom surface of the platform is relatively flat and the top surface of the platform is raised in the heel portion. The upper vamp includes a thong attached to the toe portion of the platform, and side straps attached to the thong and to opposite sides of the heel portion of the platform. The side straps flare out in width from the thong to a width of at least 11/2 inches where the side straps are attached to the heel portion. The bottom sole consists of crepe rubber and extends over the bottom surface of the platform. The bottom sole has a bottom surface including a tread for providing a gripping action between the article of footwear and a smooth floor. The bottom sole includes a toe segment extending upward and outward toward the top surface of the platform at the end of the toe portion and a heel segment extending upward and outward toward the top surface of the platform at the end of the heel portion. The bottom surface of the bottom sole between the toe and heel segments has a tread, and the toe and heel segments have a uniformly rough surface. The insole consists of suede leather.

Inventors

  • 👤 Thomas Richard Robbins
  • 👤 Stephen Edson Cunliffe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 19:25
CPC Classifications
A; A43; A43B; A43B3/00; A43B3/10; A43B3/101; A43B3/102; A43B13/00; A43B13/02; A43B13/12

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 212 words
An article of footwear, comprising: a platform having a top surface and a bottom surface, and being shaped to define a toe portion and a heel portion, said platform including; a first layer of uniform thickness extending throughout the toe and heel portion of the platform, a second layer of uniform thickness extending throughout the toe end and heel portions of the platform, and a third layer positioned between first and second layers in the heel portion for providing a platform in which the bottom of the platform is relatively flat and the top of the platform is raised in the heel portion; wherein the first and second layers consist of a flexible foam rubber having a given density, and the third layer consists of a flexible foam rubber having a density greater than said given density; an upper vamp extending from the top surface of the platform, including; a thong attached to the toe portion of the platform, and f side straps attached to the thong and to opposite sides of the platform; and; a bottom sole consisting of crepe rubber extending over the bottom surface of the platform and having a bottom surface including a tread for providing a gripping action between the article of footwear and a smooth floor.
Claim 2
Dependent Claim 212 words
An article of footwear, comprising: a platform having a top surface and a bottom surface, and being shaped to define a toe portion and a heel portion, said platform including; a first layer of uniform thickness extending throughout the toe and heel portion of the platform, a second layer of uniform thickness extending throughout the toe end and heel portions of the platform, and a third layer positioned between first and second layers in the heel portion for providing a platform in which the bottom of the platform is relatively flat and the top of the platform is raised in the heel portion; wherein the first and second layers consist of a flexible foam rubber having a given density, and the third layer consists of a flexible foam rubber having a density greater than said given density; an upper vamp extending from the top surface of the platform, including; a thong attached to the toe portion of the platform, and f side straps attached to the thong and to opposite sides of the platform; and; a bottom sole consisting of crepe rubber extending over the bottom surface of the platform and having a bottom surface including a tread for providing a gripping action between the article of footwear and a smooth floor.
Claim 3
Dependent Claim 47 words
An article of footwear according to claim 1, wherein the side straps are attached to the heel portion of the platform and flare out in width from the thong to a width of at least 11/2 inches where the side straps are attached to the heel portion.
Claim 4
Dependent Claim 56 words
An article of footwear according to claim 1, wherein the bottom sole includes a toe segment extending upward and outward toward the top surface of the platform at the end of the toe portion, and a heel segment extending upward and outward toward the top surface of the platform at the end of the heel portion.
Claim 5
Dependent Claim 36 words
An article of footwear according to claim 3, wherein the bottom surface of the bottom sole between the toe and heel segment has a tread, and the toe and heel segments have a uniformly rough surface.
Claim 6
Dependent Claim 219 words
An article of footwear, comprising: a platform having a top surface and a bottom surface, and being shaped to define a toe portion and a heel portion, said platform including; a first layer of uniform thickness extending throughout the toe and heel portions of the platform, a second layer of uniform thickness extending throughout the toe and heel portions of the platform, and a third layer positioned between the first and second layers in the heel portion of the platform and terminating in a wedge pointing away from the heel portion for providing a platform in which the bottom surface is relatively flat and the top surface is raised in the heel portion; wherein the first and second layers consist of a flexible foam rubber having a density greater than said given density and the third layer consists of a flexible foam rubber having a density greater than said given density; an upper vamp extending from the top of the platform, including; a thong attached to the toe portion of the platform, and side straps attached to the thong and to opposite sides of the platform, and a bottom sole consisting of a flexible, durable, resilient, material extending over the bottom surface including a tread for providing a gripping action between the article of footwear and a smooth floor.
Claim 7
Dependent Claim 219 words
An article of footwear, comprising: a platform having a top surface and a bottom surface, and being shaped to define a toe portion and a heel portion, said platform including; a first layer of uniform thickness extending throughout the toe and heel portions of the platform, a second layer of uniform thickness extending throughout the toe and heel portions of the platform, and a third layer positioned between the first and second layers in the heel portion of the platform and terminating in a wedge pointing away from the heel portion for providing a platform in which the bottom surface is relatively flat and the top surface is raised in the heel portion; wherein the first and second layers consist of a flexible foam rubber having a density greater than said given density and the third layer consists of a flexible foam rubber having a density greater than said given density; an upper vamp extending from the top of the platform, including; a thong attached to the toe portion of the platform, and side straps attached to the thong and to opposite sides of the platform, and a bottom sole consisting of a flexible, durable, resilient, material extending over the bottom surface including a tread for providing a gripping action between the article of footwear and a smooth floor.
Claim 8
Dependent Claim 85 words
An article of footwear according to claim 5, wherein the bottom sole includes a toe segment extending upward and outward toward the top surface of the platform at the end of the toe portion, and a heel segment extending upward and outward toward the top surface of the platform at the end of the heel portion, and wherein the bottom surface of the bottom sole between the toe and heel segments has a tread, and the toe and heel segments have a uniformly rough surface.
Claim 9
Dependent Claim 23 words
An article of footwear according to claim 5, comprising an insole consisting of suede leather extending over the top surface of the platform.
Claim 10
Dependent Claim 352 words
An article of footwear, comprising: a platform having a top surface and a bottom surface, and being shaped to define a toe portion and a heel portion, said platform including; a first layer of uniform thickness extending throughout the toe and heel portion of the platform, a second layer of uniform thickness extending throughout the toe end and heel portions of the platform, and a third layer positioned between the first and second layers in the heel portion of the platform and terminating in a wedge pointing away from the heel portion for providing a platform in which the bottom surface is relatively flat and the top surface is raised in the heel portion; wherein the first and second layers consist of flexible foam rubber having a given density, and the third layer consists of flexible foam rubber having a density greater than said given density; an upper vamp extending from the top surface of the platform, including; a thong attached to the toe portion of the platform, and side straps attached to the thong and to opposite sides of the heel portion of the platform, wherein the straps flare out in width from the thong to where the side straps are attached to the heel portion; and a bottom sole consisting of crepe rubber extending over the bottom surface of the platform and having a bottom surface including a tread for providing a gripping action between the article of footwear and a smooth floor; wherein the bottom sole includes a toe segment extending upward and outward toward the top surface of the platform at the end of the heel portion, with the toe segment extending toward the top end of the toe portion of the platform at a uniform angle and the heel segment extending toward the top end of the heel portion of the platform at one angle in a first segment and at a greater angle in a second segment, and wherein the bottom surface of the bottom sole between the toe and heel segments has a tread, and the toe and heel segments have a uniformly rough surface.
Claim 11
Dependent Claim 352 words
An article of footwear, comprising: a platform having a top surface and a bottom surface, and being shaped to define a toe portion and a heel portion, said platform including; a first layer of uniform thickness extending throughout the toe and heel portion of the platform, a second layer of uniform thickness extending throughout the toe end and heel portions of the platform, and a third layer positioned between the first and second layers in the heel portion of the platform and terminating in a wedge pointing away from the heel portion for providing a platform in which the bottom surface is relatively flat and the top surface is raised in the heel portion; wherein the first and second layers consist of flexible foam rubber having a given density, and the third layer consists of flexible foam rubber having a density greater than said given density; an upper vamp extending from the top surface of the platform, including; a thong attached to the toe portion of the platform, and side straps attached to the thong and to opposite sides of the heel portion of the platform, wherein the straps flare out in width from the thong to where the side straps are attached to the heel portion; and a bottom sole consisting of crepe rubber extending over the bottom surface of the platform and having a bottom surface including a tread for providing a gripping action between the article of footwear and a smooth floor; wherein the bottom sole includes a toe segment extending upward and outward toward the top surface of the platform at the end of the heel portion, with the toe segment extending toward the top end of the toe portion of the platform at a uniform angle and the heel segment extending toward the top end of the heel portion of the platform at one angle in a first segment and at a greater angle in a second segment, and wherein the bottom surface of the bottom sole between the toe and heel segments has a tread, and the toe and heel segments have a uniformly rough surface.
Claim 12
Dependent Claim 24 words
An article of footwear according to claim 8, further comprising an insole consisting of suede leather extending over the top surface of the platform.

References Cited (Backward Citations)

US2724912A Cited
US2758395A Cited
FR1225792A Cited
US3300880A Cited
US3345762A Cited
US3739501A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-01-23 1981-07-25 1982-01-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-01-23 1985-07-25 1986-01-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-01-23 1989-07-25 1990-01-24 $7700.00 Window Closed / Lapsed

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