US4861837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped article formed from a blend of a poly(aryl ether) and a polycarbonate and/or a polyarylate
Assignee: Syensqo Specialty Polymers USA LLC
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Filing: 1988-04-18
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Granted: 1989-08-29
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Expires: 2008-04-18
Abstract
Abstract Described herein is a shaped article formed from a blend of a poly(aryl ether) resin and an aromatic polycarbonate resin and/or a polycarbonate resin. An article molded from such a blend has improved hydrolytic stability as compared with an article molded from the constitutent components of the blend.
Inventors
- 👤 Barry L. Dickinson
- 👤 Lloyd M. Robeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:50
CPC Classifications
C; C08; C08L; C08L69/00; C08L67/00; C08L67/02; C08L67/03; C08L71/00; C08L81/00; C08L81/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
A process which comprises steam sterilizing an article comprising a blend of a polycarbonate and a poly(aryl ether).
Claim 2
Dependent Claim
18 words
A process which comprises steam sterilizing an article comprising a blend of a polycarbonate and a poly(aryl ether).
Claim 3
Dependent Claim
14 words
The process in accordance with claim 1, wherein said article is produced by thermoforming.
Claim 4
Dependent Claim
24 words
The process in accordance with claim 1, wherein said blend is extrusion compounded at temperatures ranging from about 200° C. to about 400° C.
Claim 5
Dependent Claim
15 words
The process in accordance with claim 1, wherein said article is formed by injection molding.
Claim 6
Dependent Claim
33 words
The process of claim 1, wherein said blend comprises from about 30 to about 80 wt. % of a polycarbonate and from about 70 to about 20 wt. % of a poly(aryl ether).
References Cited (Backward Citations)
US3365517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |