US3964951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining stiffening material to shoe upper using ultra high frequency radiation
Assignee: Evonik Operations GmbH
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Filing: 1974-07-02
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Granted: 1976-06-22
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Expires: 1994-07-02
Abstract
Abstract Formable or formed stiffening materials are prepared which are dry and free of fibrous materials and consisting essentially of a thermoplastic synthetic resin containing at least 3 parts of an active substance, preferably carbon black in 100 parts of the resin. Optionally, there are present conventional fillers, plasticizers, dyes, pigments and/or stabilizers against light, heat and/or mechanical influences.
Inventors
- 👤 Paul A. Kremer
- 👤 Bernhard N. Gora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A43; A43B; A43B23/00; A43B23/08; A43B23/081; A43B23/086; A43B23/16; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B32B27/18; B32B27/20; B32B27/30; B32B27/302; B32B27/304; B32B27/306; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B7/12; B29C66/00; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/48; B29L2031/50; B29L2031/505; B32B2250/00; B32B2250/24; B32B2323/00; B32B2327/00; B32B2327/06; B32B2331/00; B32B2331/04; B32B2333/00; B32B2333/04; B32B2333/08; B32B2367/00; B32B2377/00; B32B2437/00; B32B2437/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
A method of joining a stiffening material consisting essentially of a thermoplastic synthetic resin stiffening agent containing homogeneously dispersed therein 3 to 50 parts per 100 parts of the synthetic resin of carbon black or graphite as an active substance to a shoe upper material of leather or synthetic resin which is devoid of such active substance without significantly heating the shoe upper material comprising heating the stiffening material to the temperature at which it becomes soft and adhesive by subjecting the stiffening material and adjacent shoe upper material to ultra high frequency radiation for about 2 to 15 seconds.
Claim 2
Independent Claim
100 words
A method of joining a stiffening material consisting essentially of a thermoplastic synthetic resin stiffening agent containing homogeneously dispersed therein 3 to 50 parts per 100 parts of the synthetic resin of carbon black or graphite as an active substance to a shoe upper material of leather or synthetic resin which is devoid of such active substance without significantly heating the shoe upper material comprising heating the stiffening material to the temperature at which it becomes soft and adhesive by subjecting the stiffening material and adjacent shoe upper material to ultra high frequency radiation for about 2 to 15 seconds.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein the carbon black is present in an amount of 10 to 40 parts per 100 parts of synthetic resin.
Claim 4
Dependent Claim
16 words
A method according to claim 1 wherein the ultra high frequency radiation is 2450 mega Hertz.
Claim 5
Dependent Claim
13 words
A method according to claim 1 wherein the active material is carbon black.
Claim 6
Dependent Claim
15 words
A method according to claim 4, wherein the heating attained is from 60° to 140°C.
Claim 7
Dependent Claim
15 words
A method according to claim 5, wherein the heating is for up to 10 seconds.
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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |