US4006542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe insole of a solid crystalline polymer
Assignee: Larson Industries Inc
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Filing: 1974-11-04
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Granted: 1977-02-08
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Expires: 1994-11-04
Abstract
Abstract Heat softened polydienic sheets, such as transpolyisoprene or polychloroprene, are usefully mounted in rolls, the layers being separated by powders or granules such as salt to prevent cohesion, and the salt is preferably dusted off as used, or the sheet is passed through a warm water bath which will remove the salt and warm it and softening to an applying state useful for many purposes. It can be shaped as an in-sole for shoes and upon softening will accept the shape of the wearer's foot greatly improving the comfort; or as breast plates, athletic supporters, knee guards, head guards such as a helmet, ear guards or ear supports which may carry sound transfer means, i.e., such as headphones or a hearing aid; or it may be used as a bandage and for which purpose it can be reinforced by a long fiber and the comfort of the plastic bandage can be modified as by having perforations filled with fiber to transmit moisture from side to side.
Inventors
- 👤 Lester M. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:30
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/14; A43B7/28; A43B13/00; A43B13/38; A61; A61F; A61F13/00; A61F13/04; A61L; A61L15/00; A61L15/07; C; C07; C07C; C07C45/00; C07C45/61; C07C45/63; Y; Y10; Y10T; Y10T428/00; Y10T428/15; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A shoe insole comprising a heat deformed sheet of solid crystalline polymer of a solid polyolefinic compound, selected from the group consisting of transpolyisoprene, polychloroprene and each of said polymers with polybutadiene heat softenable at about 60° C and higher and hardenable by crystallization to rigid hardness upon cooling to about 40° C, said polymer being formed into a sheet sized and shaped to fit as an insole in a shoe and molded in its heat softened state at a body comfortable temperature to at least a portion of the wearer's foot.
Claim 2
Dependent Claim
92 words
A shoe insole comprising a heat deformed sheet of solid crystalline polymer of a solid polyolefinic compound, selected from the group consisting of transpolyisoprene, polychloroprene and each of said polymers with polybutadiene heat softenable at about 60° C and higher and hardenable by crystallization to rigid hardness upon cooling to about 40° C, said polymer being formed into a sheet sized and shaped to fit as an insole in a shoe and molded in its heat softened state at a body comfortable temperature to at least a portion of the wearer's foot.
Claim 3
Dependent Claim
26 words
A shoe insole as defined in claim 1, wherein the insole polymer is transpolyisoprene and extends over a substantial portion of the foot of the wearer.
Claim 4
Dependent Claim
85 words
A shoe insole comprising a polymer of a solid, crystalline, heat softenable compound, heat softened at about 60° C and higher and hardenable by setting with a time delaying hysteresis to recrystallize to rigid hardness upon cooling to about 40° C, said polymer being formed into a sheet and shaped and sized as an innersole to fit within a shoe, said innersole being moldable in its heat softened state to at least a portion of the wearer's foot and retaining said foot impression upon setting.
Claim 5
Dependent Claim
85 words
A shoe insole comprising a polymer of a solid, crystalline, heat softenable compound, heat softened at about 60° C and higher and hardenable by setting with a time delaying hysteresis to recrystallize to rigid hardness upon cooling to about 40° C, said polymer being formed into a sheet and shaped and sized as an innersole to fit within a shoe, said innersole being moldable in its heat softened state to at least a portion of the wearer's foot and retaining said foot impression upon setting.
Claim 6
Dependent Claim
32 words
A shoe insole as defined in claim 3 wherein said polymer is a solid crystalline polyolefinic compound, selected from the group consisting of transpolyisoprene, polychloroprene and each of said polymers with polybutadiene.
Claim 7
Dependent Claim
29 words
A shoe insole as defined in claim 3, having perforations distributed close spaced in a pattern throughout a substantial portion of its surface and extending from surface to surface.
Claim 8
Dependent Claim
17 words
A shoe insole as defined in claim 5, wherein the perforations have tufts of fiber inserted therein.
Claim 9
Dependent Claim
19 words
A shoe insole as defined in claim 3, wherein the polymer sheet has elongated fibers distributed throughout its body.
Claim 10
Dependent Claim
30 words
A shoe insole as defined in claim 7, wherein the polymer sheet has perforations distributed in a pattern through its body and the perforations have tufts of fiber inserted therein.
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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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |