US4460731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced thermoplastic polyester compositions
Assignee: General Electric Co
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Filing: 1983-10-12
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Granted: 1984-07-17
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Expires: 2003-10-12
Abstract
Abstract Reinforced thermoplastic molding compositions are provided comprising a high molecular weight linear polyester, such as poly(1,4-butylene terephthalate) and another high molecular weight polyester, such as poly(ethylene terephthalate), in combination with talc and one or more reinforcing agents or fillers.
Inventors
- 👤 John E. Kochanowski
- 👤 Allen D. Wambach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:23
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08K; C08K3/00; C08K3/01; C08K3/013
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A reinforced thermoplastic composition which provides molded articles with enhanced resistance to warpage, said composition consisting essentially of: (a) from about 40 to 90 parts by weight of poly(1,4-butylene terephthalate) and poly(ethylene terephthalate), the ratio of poly(1,4-butylene terephthalate) to poly(ethylene terephthalate) to poly(ethylene terphthalate) being equal to or greater than 1; and (b) from about 10 to 60 parts by weight of a combination of: (i) an effective, warp reducing amount of talc, plus (ii) a reinforcing amount of filamentous glass.
Claim 2
Dependent Claim
81 words
A reinforced thermoplastic composition which provides molded articles with enhanced resistance to warpage, said composition consisting essentially of: (a) from about 40 to 90 parts by weight of poly(1,4-butylene terephthalate) and poly(ethylene terephthalate), the ratio of poly(1,4-butylene terephthalate) to poly(ethylene terephthalate) to poly(ethylene terphthalate) being equal to or greater than 1; and (b) from about 10 to 60 parts by weight of a combination of: (i) an effective, warp reducing amount of talc, plus (ii) a reinforcing amount of filamentous glass.
Claim 3
Dependent Claim
66 words
A reinforced thermoplastic composition which provides molded articles with enhanced resistance to warpage, said composition consisting essentially of: (a) from about 40 to 70 parts by weight of poly(1,4-butylene terephthalate) and poly(ethylene terephthalate), the ratio of poly(1,4-butylene terephthalate) to poly(ethylene terephthalate) being equal to or greater than 1; and (b) about 20 parts by weight of talc plus about 10 parts by weight of filamentous glass.
Claim 4
Dependent Claim
66 words
A reinforced thermoplastic composition which provides molded articles with enhanced resistance to warpage, said composition consisting essentially of: (a) from about 40 to 70 parts by weight of poly(1,4-butylene terephthalate) and poly(ethylene terephthalate), the ratio of poly(1,4-butylene terephthalate) to poly(ethylene terephthalate) being equal to or greater than 1; and (b) about 20 parts by weight of talc plus about 10 parts by weight of filamentous glass.
References Cited (Backward Citations)
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US4122061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |