Patent US3638336A successfully refreshed from Google Patents.
US3638336A
Expired / Lapsed
US
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Protective shoe insert
Assignee: Individual
•
Filing: 1970-04-07
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Granted: 1972-02-01
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Expires: 1990-04-07
Abstract
Abstract A protective insert for a shoe, the insert being contoured to conform to the insole of the shoe and having a sculptured heel portion to cup the heel of the wearer in the space between the counter of the shoe and the insole. The insert is formed by an underlayer of foamed, closed-cell, flexible plastic material of high density, laminated to a face layer of a fabric which is longitudinally stretchable to facilitate sliding of the foot within the shoe.
Inventors
- 👤 Jack J Silverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:03
CPC Classifications
A; A43; A43B; A43B21/00; A43B21/24; A43B21/32; A43B19/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A removable shoe insert for a shoe having an insole joined to a heel and a counter which bulges away from the heel to create a marginal space therebetween, said insert comprising an underlayer of closed-cell resilient foam material to impart cushioning properties to the insert, and a face layer laminated thereto to engage the plantar area of the foot, the profile of the insert generally conforming to the insole of the shoe, the heel portion of the insert having a sculptured well formed therein to conform to the shape of a human heel, thereby to cup the heel, said heel portion of the insert having a marginal flange receivable within said marginal space of the shoe, said layer being longitudinally stretchable to yield to the sliding motion of the foot within the shoe.
Claim 2
Dependent Claim
134 words
A removable shoe insert for a shoe having an insole joined to a heel and a counter which bulges away from the heel to create a marginal space therebetween, said insert comprising an underlayer of closed-cell resilient foam material to impart cushioning properties to the insert, and a face layer laminated thereto to engage the plantar area of the foot, the profile of the insert generally conforming to the insole of the shoe, the heel portion of the insert having a sculptured well formed therein to conform to the shape of a human heel, thereby to cup the heel, said heel portion of the insert having a marginal flange receivable within said marginal space of the shoe, said layer being longitudinally stretchable to yield to the sliding motion of the foot within the shoe.
Claim 3
Dependent Claim
18 words
A shoe insert as set forth in claim 1, wherein said underlayer is formed of closed-cell, high-density polyethylene.
Claim 4
Dependent Claim
19 words
A shoe insert as set forth in claim 1, wherein said face layer is of stretchable nylon fabric material.
References Cited (Backward Citations)
US32487A
Cited
US377416A
Cited
US1787487A
Cited
US2008207A
Cited
US2748502A
Cited
US3418732A
Cited
FR1509112A
Cited
US3449844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |