US4434271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass filled poly(p-methylstyrene)
Assignee: Mobil Oil AS
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Filing: 1982-08-13
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Granted: 1984-02-28
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Expires: 2002-08-13
Abstract
Abstract This invention provides a heat stabilized composition comprising poly(p-methylstyrene) containing between about 5 percent and about 50 percent, based upon the total weight of the composition, of short glass fibers.
Inventors
- 👤 Frank J. Feeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:14
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
A heat stabilized homogeneous thermoplastic composition consisting essentially of p-methylstyrene homopolymer or copolymer containing at least 90 weight percent polymerized p-methylstyrene and 10 to 1 weight percent of a conjugated diene, in which said p-methyl styrene comprises mixtures of methyl styrenes containing at least 90 weight percent p-methylstyrene, less than 0.1 weight percent o-methylstyrene and the balance m-methylstyrene; and between about 5 percent and about 50 percent, based on the total weight of the composition, of a reinforcing filler which predominantly comprises glass fibers.
Claim 2
Dependent Claim
84 words
A heat stabilized homogeneous thermoplastic composition consisting essentially of p-methylstyrene homopolymer or copolymer containing at least 90 weight percent polymerized p-methylstyrene and 10 to 1 weight percent of a conjugated diene, in which said p-methyl styrene comprises mixtures of methyl styrenes containing at least 90 weight percent p-methylstyrene, less than 0.1 weight percent o-methylstyrene and the balance m-methylstyrene; and between about 5 percent and about 50 percent, based on the total weight of the composition, of a reinforcing filler which predominantly comprises glass fibers.
Claim 3
Dependent Claim
14 words
The composition of claim 1 in which said reinforcing filler consists of glass fibers.
References Cited (Backward Citations)
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Cited
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Cited
US3931094A
Cited
US4104334A
Cited
US4212697A
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US4230836A
Cited
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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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |