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US4769423A
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Block copolymers of optionally substituted poly(oxy-1,4-phenylene) segments and liquid crystalline segments
Assignee: Bayer AG
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Filing: 1986-02-06
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Granted: 1988-09-06
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Expires: 2006-02-06
Abstract
Abstract The invention relates to block copolymers of optionally substituted poly(oxy-1,4-phenylene) segments and liquid crystalline segments.
Inventors
- 👤 Wilhelm Risse
- 👤 Walter Heitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:10
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08G81/00; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3814; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
28 words
Block copolymers comprising blocks A and B wherein block A is a poly(oxy-1,4-phenylene) segment and block B is a polymer segment having the properties of a liquid crystal.
Claim 2
Dependent Claim
28 words
Block copolymers comprising blocks A and B wherein block A is a poly(oxy-1,4-phenylene) segment and block B is a polymer segment having the properties of a liquid crystal.
Claim 3
Dependent Claim
15 words
Block copolymers according to claim 1, characterised in that they substantially have the structure AB.
Claim 4
Dependent Claim
15 words
Block copolymers according to claim 1, characterised in that they substantially have the structure ABA.
Claim 5
Dependent Claim
15 words
Block copolymers according to claim 1, characterised in that they substantially have the structure BAB.
Claim 6
Dependent Claim
22 words
Block copolymers according to claim 1, characterised in that they substantially have the structure (AB) x , where x represents a number>1.
Claim 7
Dependent Claim
34 words
Block copolymers according to claim 1, characterised in that the percentage by weight of the block A is 3 to 97% and the percentage by weight of the block B is 97 to 3%.
Claim 8
Dependent Claim
18 words
Block copolymers according to claim 1, characterised in that the blocks are linked via ether or ester groups.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |