US4016326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layer composition
Assignee: MICROPLASTIC CORP C/O AROSEMANA VELASQUEZ U ARIAS AVENIDA NICANOR OBARRIO Y CELLE VENEZUELA
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Filing: 1975-04-01
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Granted: 1977-04-05
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Expires: 1995-04-01
Abstract
Abstract A layer composition, which may be used for making shoes, upholstery or the like, comprising a carrier layer and a cover layer adhering thereto. The cover layer essentially consists of a synthetic resin material which bubbles are imbedded. The shells of the bubbles consists of a thermoplastic synthetic resin material other than the material of the cover layer. Preferably the shell of the bubbles consists of an elastic copolymer of polyvinylidene chloride and/or of a copolymer of polyvinyl chloride. The bubbles are bonded to the material of the cover layer and have hollow cores containing a gas, preferably air. The volume of the hollow cores amounts to at least 25%, preferably 50 to 85%, of the total volume of the cover layer.
Inventors
- 👤 Helmut Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/0043; C; C08; C08J; C08J9/00; C08J9/32; C14; C14C; C14C9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249954; Y10T428/249971; Y10T428/249972; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/31504; Y10T428/31551; Y10T428/31558
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A composite leather multilayer structure for shoe material and the lime comprising a natural leather carrier layer and a cover layer bonded to said leather carrier layer and consisting of a polyurethane synthetic-resin matrix having bubbles of diameters of substantially 0.009 to 0.6 mm distributed therein, said bubbles each being elastically deformable and having a shell of polyvinylidene chloride copolymer synthetic-resin thermoplastic material and enclosing a gas-filled space, said gas-filled spaces constituting 50 to 85% of the total volume of said cover layer, said cover layer having a surface remote from said carrier layer forming a leather-like pattern.
Claim 2
Dependent Claim
98 words
A composite leather multilayer structure for shoe material and the lime comprising a natural leather carrier layer and a cover layer bonded to said leather carrier layer and consisting of a polyurethane synthetic-resin matrix having bubbles of diameters of substantially 0.009 to 0.6 mm distributed therein, said bubbles each being elastically deformable and having a shell of polyvinylidene chloride copolymer synthetic-resin thermoplastic material and enclosing a gas-filled space, said gas-filled spaces constituting 50 to 85% of the total volume of said cover layer, said cover layer having a surface remote from said carrier layer forming a leather-like pattern.
Claim 3
Dependent Claim
19 words
The multilayer structure defined in claim 1 wherein said diameters are in the range of 0.01 to 0.06 mm.
Claim 4
Dependent Claim
17 words
The multilayer structure defined in claim 1 wherein said bubbles are only loosely bonded to said matrix.
Claim 5
Dependent Claim
31 words
The multilayer structure defined in claim 3, further comprising a layer of an antibonding agent along the outer surfaces of said bubbles for resisting bonding between said shells and said matrix.
Claim 6
Dependent Claim
25 words
The multilayer structure defined in claim 4 wherein said antibonding agent is selected from the group which consists of polysiloxanes, fatty acids and fatty alcohols.
Claim 7
Dependent Claim
30 words
The multilayer structure defined in claim 1 wherein the proportion of said spaces in a surface region of said cover layer is greater than that in a central region thereof.
Claim 8
Dependent Claim
16 words
The multilayer structure defined in claim 1 wherein said surface is formed with a finishing layer.
References Cited (Backward Citations)
US3615974A
Cited
US3864181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |