US3643353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Footwear
Assignee: Monsanto Chemicals Ltd
•
Filing: 1970-04-03
•
Granted: 1972-02-22
•
Expires: 1990-04-03
Abstract
Abstract An improved article of footwear comprising a heelboard and an upper wherein the outer edge of the upper is bent around the heelboard and adhesively bonded to the lower surface thereof, wherein the improvement comprises a sheet of resin which covers at least a portion of the lower surface of the heelboard, said resin being selected from the group consisting of: A. copolymers of at least one olefin with at least one nonhydrocarbon aliphatic monomer, and B. blends of A with at least one polyolefin, whereby the adhesive bond between the upper and the heelboard is strengthened.
Inventors
- 👤 Donald Weight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
A; A43; A43B; A43B9/00; A43B9/12; A43B13/00; A43B13/38; B; B29; B29C; B29C59/00; B29C59/10; B29K; B29K2023/00; B29L; B29L2031/00; B29L2031/48; B29L2031/50; B29L2031/507
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
22 words
An article of footwear according to claim 1, in which the resin sheet extends completely over the lower surface of the heelboard.
Claim 2
Dependent Claim
26 words
An article of footwear according to claim 1 in which the resin sheet is integral with a flexible forepart so as to form an insole assembly.
Claim 3
Dependent Claim
26 words
An article of footwear according to claim 1 in which in the copolymer the olefin component is an olefin having from two to four carbon atoms.
Claim 4
Dependent Claim
14 words
An article of footwear according to claim 4, in which the olefin is ethylene.
Claim 5
Dependent Claim
17 words
An article of footwear according to claim 1 in which the nonhydrocarbon component is an unsaturated ester.
Claim 6
Dependent Claim
26 words
An article of footwear according to claim 6, in which the ester is an ester of a lower unsaturated alcohol with a lower aliphatic carboxylic acid.
Claim 7
Dependent Claim
15 words
An article of footwear according to claim 7, in which the ester is vinyl acetate.
Claim 8
Dependent Claim
26 words
An article of footwear according to claim 1 in which The copolymer contains from about 3 to about 15 percent by weight of the nonhydrocarbon monomer.
Claim 9
Dependent Claim
26 words
An article of footwear according to claim 9, in which the resin contains from about 3 to about 5 percent by weight of the nonhydrocarbon monomer.
Claim 10
Dependent Claim
26 words
An article of footwear according to claim 1, in which the resin sheet has a substantially uniform thickness of from about 0.06 to about 0.085 inch.
Claim 11
Dependent Claim
15 words
An article of footwear according to claim 1, in which the resin sheet is foamed.
Claim 12
Dependent Claim
33 words
An article of footwear according to claim 12, in which the foamed resin has a substantially closed structure and the majority of the cells have a diameter from 0.004 inch to 0.04 inch.
Claim 13
Dependent Claim
25 words
An article of footwear according to claim 13, in which the density of the foamed resin is from 22 to 30 pounds per cubic foot.
Claim 14
Dependent Claim
26 words
An article of footwear according to claim 1, in which the resin sheet is one that has been subjected to the action of an electric discharge.
Claim 15
Dependent Claim
46 words
An article of footwear according to claim 1, in which the adhesive bond between the outer edge of the upper and the resin sheet is achieved by means of an adhesive selected from the group consisting of cold adhesives, hot-melt adhesives, polyurethane adhesives and neoprene adhesives.
Claim 16
Dependent Claim
37 words
An article of footwear according to claim 1, in which during the course of the bonding the resin sheet has been exposed to an elevated temperature for a period of time not in excess of 5 seconds.
Claim 17
Dependent Claim
55 words
A heelboard for use in constructing an article of outer footwear such as a boot or shoe, comprising a cellulose fiber board having a lower surface that comprises a sheet of resin, the resin being a copolymer of an olefin and a nonhydrocarbon aliphatic monomer or a blend of such a copolymer with a polyolefin.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |