Patent US4278775A successfully refreshed from Google Patents.
US4278775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maleimide-styrene copolymer blend with polyphenylene oxide
Assignee: Lyondell Chemical Technology LP
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Filing: 1980-06-23
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Granted: 1981-07-14
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Expires: 2000-06-23
Abstract
Abstract An advantageous blend suitable for the molding of plastic articles is prepared by mechanically mixing a polyphenylene ether resin and a polymeric resin derived from maleimide and styrene.
Inventors
- 👤 Ronald A. Fava
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:51
CPC Classifications
C; C08; C08L; C08L35/00; C08L35/06; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
49 words
A thermoplastic composition for molding of plastic articles consisting of a blend of A. polyphenylene oxide B. a resin containing 5 to 35% maleimide and and 86 to 93% styrene each of components A and B being present in a weight concentration within a range from 35% to 65%.
Claim 2
Dependent Claim
49 words
A thermoplastic composition for molding of plastic articles consisting of a blend of A. polyphenylene oxide B. a resin containing 5 to 35% maleimide and and 86 to 93% styrene each of components A and B being present in a weight concentration within a range from 35% to 65%.
Claim 3
Dependent Claim
15 words
The thermoplastic composition of claim 1 in which the resin contains 7 to 14% maleimide.
Claim 4
Dependent Claim
16 words
The thermoplastic composition of claim 1 in which the resin B contains 7 to 14% maleimide.
Claim 5
Dependent Claim
15 words
The thermoplastic composition of claim 1 in which the resin B contains about 8% maleimide.
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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |