US3791050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe sole and heel
Assignee: Wolverine World Wide Inc
•
Filing: 1972-01-19
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Granted: 1974-02-12
•
Expires: 1992-01-19
Abstract
Abstract A shoe sole and heel integrally molded of an elastomeric material having a filler of hollow glass spheres dispersed therein. The spheres are mixed with the elastomeric material prior to molding. The resulting composition is injection molded in the shape of a heel and sole directly on the bottom of a shoe upper to form a lightweight, relatively inexpensive and wearresistant shoe bottom.
Inventors
- 👤 R Egtvedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/0009; A; A43; A43B; A43B13/00; A43B13/02; A43B13/12; B29D35/02; B29D35/12; B29D35/122; B29D35/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
40 words
A shoe sole molded of an elastomeric material having a rigid filler material comprising intact hollow spheres dispersed uniformly therein, said spheres being of lesser density than said elastomeric material and forming approximately 15-20 percent by volume of the sole.
Claim 2
Dependent Claim
40 words
A shoe sole molded of an elastomeric material having a rigid filler material comprising intact hollow spheres dispersed uniformly therein, said spheres being of lesser density than said elastomeric material and forming approximately 15-20 percent by volume of the sole.
Claim 3
Dependent Claim
24 words
The shoe sole as defined in claim 1 wherein said spheres comprise hollow glass spheres having a diameter of from 25 to 100 micrometers.
Claim 4
Dependent Claim
15 words
The shoe sole as defined in claim 1 wherein said elastomeric material is polyvinyl chloride.
Claim 5
Dependent Claim
15 words
The shoe sole as defined in claim 1 and further including an integrally molded heel.
Claim 6
Dependent Claim
37 words
In a shoe sole molded of an elastomeric material, the improvement comprising a rigid filler of uniformly dispersed hollow spheres within said elastomeric sole material and comprising 15-20 percent of the total volume of said shoe sole.
Claim 7
Dependent Claim
37 words
In a shoe sole molded of an elastomeric material, the improvement comprising a rigid filler of uniformly dispersed hollow spheres within said elastomeric sole material and comprising 15-20 percent of the total volume of said shoe sole.
Claim 8
Dependent Claim
24 words
The shoe sole as defined in claim 5 wherein said filler comprises 15 to 20 percent of the total volume of said shoe sole.
Claim 9
Dependent Claim
56 words
A shoe having an innersole with a bottom attached thereto, said bottom comprising a heel and sole integrally molded from an elastomeric material and including a plurality of hollow glass spheres uniformly dispersed therein, said sphers having a diameter of from 25 to 100 micrometers and comprising 15 to 20 percent by volume of said bottom.
Claim 10
Dependent Claim
56 words
A shoe having an innersole with a bottom attached thereto, said bottom comprising a heel and sole integrally molded from an elastomeric material and including a plurality of hollow glass spheres uniformly dispersed therein, said sphers having a diameter of from 25 to 100 micrometers and comprising 15 to 20 percent by volume of said bottom.
Claim 11
Dependent Claim
13 words
The shoe as defined in claim 7 wherein said elastomeric material comprises PVC.
Claim 12
Dependent Claim
19 words
The shoe as defined in claim 8 wherein said bottom is molded directly to said innersole of said shoe.
References Cited (Backward Citations)
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |