US4438171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coextruded product of AES-thermoplastic graft copolymer
Assignee: PENSION BENEFIT GUARANTY Corp
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Filing: 1982-08-09
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Granted: 1984-03-20
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Expires: 2002-08-09
Abstract
Abstract Laminate comprising AES of the dicyclopentadiene type coextruded onto a thermoplastic resin layer such as ABS.
Inventors
- 👤 John M. Wefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:22
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B25/14; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2355/00; B32B2355/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31924; Y10T428/31931
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A coextruded product having a total thickness of from 25 to 500 mils, and at least one surface layer having a thickness of from 3 to 150 mils of graft copolymer composition comprising a graft copolymer of resin-forming material selected from vinyl aromatic, alkenoic nitrile, alkenoic ester and alkenoic acid monomers on ethylene-propylene-dicyclopentadiene terpolymer rubber, said surface layer containing up to 10 parts by weight of pigment per 100 parts of graft copolymer composition.
Claim 2
Dependent Claim
74 words
A coextruded product having a total thickness of from 25 to 500 mils, and at least one surface layer having a thickness of from 3 to 150 mils of graft copolymer composition comprising a graft copolymer of resin-forming material selected from vinyl aromatic, alkenoic nitrile, alkenoic ester and alkenoic acid monomers on ethylene-propylene-dicyclopentadiene terpolymer rubber, said surface layer containing up to 10 parts by weight of pigment per 100 parts of graft copolymer composition.
Claim 3
Dependent Claim
31 words
A coextruded product as in claim 1 having an underlying layer of thermoplastic resin selected from acrylonitrile-butadiene-styrene, polyvinyl chloride, styrene-acrylonitrile, acrylic resin, and blend of styrene-acrylonitrile-maleic anhydride copolymer with polybutadiene rubber.
Claim 4
Dependent Claim
15 words
A coextruded product as in claim 2 in which the underlying layer is acrylonitrile-butadiene-styrene composition.
Claim 5
Dependent Claim
23 words
A coextruded product as in any of claims 1, 2 or 3 in which the resin-forming material in the graft copolymer is styrene-acrylonitrile.
Claim 6
Dependent Claim
81 words
A coextruded product having on one or both sides a surface layer 3 to 150 mils thick comprising graft copolymer composition containing up to 10 parts by weight of pigment per 100 parts by weight of graft copolymer composition comprising a graft copolymer of resin-forming material selected from vinyl aromatic, alkenoic nitrile, alkenoic ester and alkenoic acid monomers on ethylene-propylene-dicyclopentadiene terpolymer rubber, and an underlying layer of acrylonitrile-butadiene-styrene thermoplastic resin, the total thickness of the product being 25 to 500 mils.
Claim 7
Dependent Claim
81 words
A coextruded product having on one or both sides a surface layer 3 to 150 mils thick comprising graft copolymer composition containing up to 10 parts by weight of pigment per 100 parts by weight of graft copolymer composition comprising a graft copolymer of resin-forming material selected from vinyl aromatic, alkenoic nitrile, alkenoic ester and alkenoic acid monomers on ethylene-propylene-dicyclopentadiene terpolymer rubber, and an underlying layer of acrylonitrile-butadiene-styrene thermoplastic resin, the total thickness of the product being 25 to 500 mils.
Claim 8
Dependent Claim
48 words
A coextruded product as in claim 5 in which the rubber in the said graft copolymer composition has an ethylene:propylene weight ratio of from 80/20 to 20/80, a Mooney viscosity of from 30 to 90 ML-4 at 257° F., and an iodine number of from 10 to 50.
Claim 9
Dependent Claim
42 words
A coextruded product as in claim 6 in which the resin forming material in the graft copolymer is styrene-acrylonitrile in weight ratio of 80/20 to 65/35, and the ratio of resin to rubber is in the range of from 90/10 to 65/35.
References Cited (Backward Citations)
US4202948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |