US4508883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating copolymer of brominated styrene and N-brominated phenyl maleimide
Assignee: Lyondell Chemical Technology LP
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Filing: 1983-04-28
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Granted: 1985-04-02
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Expires: 2003-04-28
Abstract
Abstract A flame retarding additive comprising an alternating copolymer of a brominated styrene and N-brominated phenylmaleimide, is blended with a matrix resin to produce molding compositions which when molded exhibit improved flame retarding characteristics. The flame retarding additives of this invention also exhibit non-blooming characteristics.
Inventors
- 👤 Usama E. Younes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:22
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/16; C08F212/21; C08F222/00; C08F222/36; C08F222/40; C08F222/408
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
An alternating copolymer having the following general formula: ##STR3## wherein each x separately represents an integer of from 1 to 5 and n represents an integer of from 10 to 2000.
Claim 2
Dependent Claim
31 words
An alternating copolymer having the following general formula: ##STR3## wherein each x separately represents an integer of from 1 to 5 and n represents an integer of from 10 to 2000.
References Cited (Backward Citations)
US4302484A
Cited
US4388451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |