US3663654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant composition of polyphenylene ether,styrene resin and phosphorus
Assignee: General Electric Co
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Filing: 1969-02-24
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Granted: 1972-05-16
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Expires: 1989-02-24
Abstract
Abstract A BLEND OF A POLYPHENYLENE ETHER AND A STYRENE RESIN CHARACTERIZED BY THE ADDITION OF A SMALL BUT EFFECTIVE QUANTITY OF ELEMENTAL PHOSPHORUS. THE POLYPHENYLENE ETHERS ARE FLAME RETARDANT. THE ADMIXTURE OF A POLYPHENYLENE ETHER WITH A STYRENE RESIN DESTROYS FLAME RETARDANT PROPERTIES. IN ACCORDANCE WITH THE PRESENT INVENTION, IT HAS BEEN FOUND THAT THE ADDITION OF ELEMENTAL PHOSPHORUS, PREFERABLY ELEMENTAL RED PHSOPHORUS IN SMALL AMOUNTS, TYPICALLY FROM 0.1 TO 5% OF THE TOTAL COMPOSITINS, PROVIDES A BLEND HAVING EXCELLENT FLAME RETARDANT PROPERTIES. MOREOVER, OTHER PROPERTIES OF THE BLEND ARE NOT MATERIALLY AFFECTED BY THE ADDITION OF THE PHOSPHORUS.
Inventors
- 👤 William R Haaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:00
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08K; C08K3/00; C08K3/02; C08L25/18; C08L55/00; C08L55/02; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L2201/00; C08L2201/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |