US4849474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture reduction in polyamide compositions
Assignee: General Electric Co
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Filing: 1988-11-10
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Granted: 1989-07-18
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Expires: 2008-11-10
Abstract
Abstract Novel moisture resistant polyamide compositions are prepared comprising at least one polyamide and at least one di- or poly- hydric compound, oligomer or polymer free of sterically hindered hydroxy groups.
Inventors
- 👤 Robert R. Gallucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C08K5/1539; C08K5/09; C08K5/092; C08K5/13; C08L; C08L77/00; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A polyamide composition comprising: (a) at least one polyamide; (b) at least one polyphenylene ether; (c) at least one compound selected from the group consisting of maleic anhydride and citric acid; and (d) at least one polyvinyl phenol having a number average molecular weight of from 400 to 40,000, said polyvinyl phenol being present in said composition in an amount of from 0.5 to about 30 percent by weight based on the combined weight of polyvinyl phenol and polyamide.
Claim 2
Dependent Claim
79 words
A polyamide composition comprising: (a) at least one polyamide; (b) at least one polyphenylene ether; (c) at least one compound selected from the group consisting of maleic anhydride and citric acid; and (d) at least one polyvinyl phenol having a number average molecular weight of from 400 to 40,000, said polyvinyl phenol being present in said composition in an amount of from 0.5 to about 30 percent by weight based on the combined weight of polyvinyl phenol and polyamide.
Claim 3
Dependent Claim
16 words
A composition as in claim 1 wherein said composition further comprises a styrene-hydrogenated butadiene-styrene triblock copolymer.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |