US4111875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition of heel base for shoes
Assignee: Individual
•
Filing: 1976-02-20
•
Granted: 1978-09-05
•
Expires: 1996-02-20
Abstract
Abstract In a shoe construction, effective chemical bonding rather than nailing of a lower rubber heel to an inner heel base is enabled by the chemical composition and surface conditioning of the latter. The chemical composition is characterized by a mixture of a polyethylene, an ethylene vinyl copolymer, a filler, and a dessicant in particular proportions. The surface conditioning is characterized by an oxidizing flame treatment.
Inventors
- 👤 Pasquale A. Uva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:33
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0853; C08L2205/00; C08L2205/02; C08L2205/03; C08L2205/035
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
A heel base having a pair of opposed faces and a plurality of edges, (a) said heel base being of a composition consisting essentially of the following ingredients: ______________________________________
% by Total Weight
______________________________________
ethylene vinyl acetate copolymer
8 to 85
ethylene homopolymer 5 to 25
processing lubricant 0 to 2
filler 10 to 60
internal lubricant 1 to 5
dessicant 1 to 25
______________________________________ (b) said ethylene vinyl acetate copolymer and said ethylene homopolymer, based on their own weight, including from 15 to 30% ethylene vinyl acetate copolymer and from 85 to 70% ethylene homopolymer; (c) said dessicant weighing at least three times the available free moisture of said composition; (d) one of said pair of opposed faces being adapted for affixation to a portion associated with a shoe upper; and (e) the other of said pair of opposed faces being mechanically rough and chemically active for enhanced bonding by an adhesive to a heel.
Claim 2
Dependent Claim
156 words
A heel base having a pair of opposed faces and a plurality of edges, (a) said heel base being of a composition consisting essentially of the following ingredients: ______________________________________
% by Total Weight
______________________________________
ethylene vinyl acetate copolymer
8 to 85
ethylene homopolymer 5 to 25
processing lubricant 0 to 2
filler 10 to 60
internal lubricant 1 to 5
dessicant 1 to 25
______________________________________ (b) said ethylene vinyl acetate copolymer and said ethylene homopolymer, based on their own weight, including from 15 to 30% ethylene vinyl acetate copolymer and from 85 to 70% ethylene homopolymer; (c) said dessicant weighing at least three times the available free moisture of said composition; (d) one of said pair of opposed faces being adapted for affixation to a portion associated with a shoe upper; and (e) the other of said pair of opposed faces being mechanically rough and chemically active for enhanced bonding by an adhesive to a heel.
Claim 3
Dependent Claim
14 words
The heel base of claim 1 wherein said ethylene homopolymer is high density polyethylene.
Claim 4
Dependent Claim
19 words
The heel base of claim 2 wherein said high density polyethylene ranges in specific gravity from 0.941 to 0.965.
Claim 5
Dependent Claim
12 words
The heel base of claim 1 wherein said filler is carbon black.
Claim 6
Dependent Claim
13 words
The heel base of claim 1 wherein said internal lubricant is stearic acid.
Claim 7
Dependent Claim
12 words
The heel base of claim 1 wherein said dessicant contains calcium oxide.
Claim 8
Dependent Claim
14 words
The heel base of claim 1 wherein said other of said faces is flat.
Claim 9
Dependent Claim
14 words
The heel base of claim 1 wherein said other of said faces is cupped.
Claim 10
Dependent Claim
15 words
The heel base of claim 1 wherein processing lubricant is a low molecular weight polyethylene.
Claim 11
Dependent Claim
19 words
The heel base of claim 1 wherein said filler is a mineral powder or a mixture of mineral powders.
Claim 12
Dependent Claim
17 words
The heel base of claim 1 wherein said internal lubricant is a dispersing agent for said filler.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |