Patent US4613645A successfully refreshed from Google Patents.
US4613645A
Expired / Lapsed
US
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Silicon carbide reinforcement of poly(aryl ether ketones)
Assignee: BP Corp North America Inc
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Filing: 1985-08-12
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Granted: 1986-09-23
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Expires: 2005-08-12
Abstract
Abstract Thermoplastic, injection moldable composites comprising at least one poly(aryl ether ketone) having silicon carbide whiskers dispersed therein exhibit excellent tensile properties coupled with high elongation relative to poly(aryl ether ketone) composites with other inorganic fibers. The composites are useful for making articles such as electrical connectors.
Inventors
- 👤 Lloyd M. Robeson
- 👤 James E. Harris
- 👤 Michael J. Michno, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:56
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08G; C08G61/00; C08G61/12; C08G61/127; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4012
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
A thermoplastic, injection moldable composite comprising at least one poly(aryl ether ketone) having silicon carbide whiskers dispersed therein.
Claim 2
Dependent Claim
18 words
A thermoplastic, injection moldable composite comprising at least one poly(aryl ether ketone) having silicon carbide whiskers dispersed therein.
Claim 3
Dependent Claim
75 words
A composite as defined in claim 1 wherein the poly(aryl ether ketone) contains repeating units of one or more of the following formulae: ##STR8## wherein Ar is independently a divalent aromatic radical selected from phenylene, biphenylene or naphthylene, X is independently --O--, ##STR9## or a direct bond and n is an integer of from 0 to 3, b, c, d and e are 0 to 1 and a is an integer of 1 to 4.
Claim 4
Dependent Claim
24 words
A composite as defined in claim 1 wherein the poly(aryl ether ketones) have repeating units of one or more of the following formula: ##STR10##
Claim 5
Dependent Claim
21 words
A composite as defined in claim 1, wherein said silicon carbide whiskers have an L/D ratio between 3 and about 200.
Claim 6
Dependent Claim
32 words
A composite as defined in claim 1, wherein said silicon carbide whiskers are present in an amount between about 2 and about 50 wt. % based on the weight of the composite.
Claim 7
Dependent Claim
23 words
A composite as defined in claim 5, wherein said whiskers are present in an amount between about 5 and about 35 wt. %.
Claim 8
Dependent Claim
20 words
A composite as defined in claim 6, wherein said whiskers are present in an amount of about 20 wt. %.
Claim 9
Dependent Claim
44 words
A composite as defined in claim 1, further comprising, in an amount up to about 50 wt.% based on the total weight of the composite, a polymer selected from the group consisting of poly(etherimides), polyimides, polysulfone, poly(ethersulfone), poly(aryl ether sulfone), polyarylates, and poly(phenylene sulfide).
Claim 10
Dependent Claim
20 words
The composite of claims 1, 2, 3, 4, 5, 6, 7 or 8, in the form of an electrical connector.
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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) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |