US4133795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crepe soles
Assignee: Shell USA Inc
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Filing: 1978-03-27
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Granted: 1979-01-09
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Expires: 1998-03-27
Abstract
Abstract A footwear composition having a simulated crepe appearance and possessing much improved cycle times is prepared by melt blending a monoalkenyl arene/diene block copolymer, oil, non-hygroscopic filler, crystal polystyrene, and synthetic fiber at a temperature below the melting point of the fiber. The synthetic fiber is preferably selected from the group consisting of polyamide fibers, polyester fibers, acrylic fibers, and mixtures thereof.
Inventors
- 👤 Glenn R. Himes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:58
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08K; C08K3/00; C08K3/01; C08K3/013; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L91/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
167 words
A footwear composition having a simulated crepe appearance comprising: (a) 100 parts by weight of a block copolymer having at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene mid block B, each block A having an average molecular weight between about 5,000 and about 125,000 and each block B having an average molecular weight between about 15,000 and about 250,000, said blocks A comprising 8-65% by weight of the copolymer; (b) about 5 to about 125 parts by weight of a crystal grade polystyrene; (c) about 5 to about 175 parts by weight of a hydrocarbon extending oil; (d) about 5 to about 150 parts by weight of a non-hygroscopic, finely divided filler; and (e) about 5 to about 50 parts by weight of a synthetic fiber selected from the group consisting of polyamide fibers, polyester fibers, acrylic fibers, and mixtures thereof; wherein the various components are melt blended at a temperature below the melting point of said synthetic fiber.
Claim 2
Dependent Claim
167 words
A footwear composition having a simulated crepe appearance comprising: (a) 100 parts by weight of a block copolymer having at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene mid block B, each block A having an average molecular weight between about 5,000 and about 125,000 and each block B having an average molecular weight between about 15,000 and about 250,000, said blocks A comprising 8-65% by weight of the copolymer; (b) about 5 to about 125 parts by weight of a crystal grade polystyrene; (c) about 5 to about 175 parts by weight of a hydrocarbon extending oil; (d) about 5 to about 150 parts by weight of a non-hygroscopic, finely divided filler; and (e) about 5 to about 50 parts by weight of a synthetic fiber selected from the group consisting of polyamide fibers, polyester fibers, acrylic fibers, and mixtures thereof; wherein the various components are melt blended at a temperature below the melting point of said synthetic fiber.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein said block A is a polystyrene block and said block B is a polybutadiene block.
Claim 4
Dependent Claim
12 words
A composition according to claim 2 wherein said filler is calcium carbonate.
Claim 5
Dependent Claim
48 words
A composition according to claim 1 wherein said block copolymer is selectively hydrogenated such that no more than about 25% of the aromatic double bonds of block A are reduced by hydrogenation while at least 75% of the aliphatic double bonds of block B are reduced by hydrogenation.
Claim 6
Dependent Claim
21 words
A composition according to claim 1 wherein said synthetic fiber is a blend of a polyester fiber and an acrylic fiber.
Claim 7
Dependent Claim
23 words
A composition according to claim 1 wherein the components are blended together at a temperature between about 250° F. and about 475° F.
Claim 8
Dependent Claim
9 words
A shoe sole having the composition of claim 1.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |