US5202054A
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Liquid crystal compound
Assignee: Showa Shell Sekiyu KK
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Filing: 1991-01-28
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Granted: 1993-04-13
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Expires: 2011-01-28
Abstract
Abstract A liquid crystal compound represented by formula (I): ##STR1## wherein R 1 represents an alkyl group having from 1 to 18 carbon atoms; R 2 represents an optically active group represented by formula (II), (III) or (IV): ##STR2## wherein R 3 represents a lower halo-alkyl group having from 1 to 2 carbon atoms; X represents --O--, --COO--, --OCO-- or a single bond; Y represents --CH 2 O-- or --COO--; and Z represents --COO-- or --O--, l represents 0 or 1, provided that when l is 0, Y is a single bond; n represents an integer of from 1 to 18; and * indicates an optically active center. The compound exhibits three stable states of molecular orientation.
Inventors
- 👤 Yoshiichi Suzuki
- 👤 Hiroyuki Mogamiya
- 👤 Noriko Yamakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:46
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A liquid crystal compound represented by formula (I): ##STR19## wherein R 1 represents an alkyl group having from 1 to 18 carbon atoms; R 2 represents an optically active group represented by formula (II), (III) or (IV): ##STR20## wherein R 3 represents a lower halo-alkyl group having from 1 to 2 carbon atoms; Y represents --COO-- when l is 1, and Y represents --COO-- when l is 1, and Y represents a single bond when l is 0 or 1; n represents an integer of from 1 to 18; and * indicates an optically active center.
Claim 2
Dependent Claim
96 words
A liquid crystal compound represented by formula (I): ##STR19## wherein R 1 represents an alkyl group having from 1 to 18 carbon atoms; R 2 represents an optically active group represented by formula (II), (III) or (IV): ##STR20## wherein R 3 represents a lower halo-alkyl group having from 1 to 2 carbon atoms; Y represents --COO-- when l is 1, and Y represents --COO-- when l is 1, and Y represents a single bond when l is 0 or 1; n represents an integer of from 1 to 18; and * indicates an optically active center.
Claim 3
Dependent Claim
50 words
A liquid crystal compound represented by formula (V): ##STR21## wherein R 1 represents an alkyl group having from 1 to 18 carbon atoms; R 4 represents CF 3 or C 2 F 5 ; n represents an integer of from 1 to 18; and * represents an optically active center.
Claim 4
Dependent Claim
50 words
A liquid crystal compound represented by formula (V): ##STR21## wherein R 1 represents an alkyl group having from 1 to 18 carbon atoms; R 4 represents CF 3 or C 2 F 5 ; n represents an integer of from 1 to 18; and * represents an optically active center.
Claim 5
Dependent Claim
125 words
A liquid crystal composition which comprises (A) a liquid crystal compound represented by formula (VI) and (B) a liquid crystal compound represented by formula (I): ##STR22## wherein R 1 represents an alkyl group having from 1 to 18 carbon atoms; R 2 represents an optically active group represented by formula (II), (III) or (IV): ##STR23## wherein R 3 represents a lower halo-alkyl group having from 1 to 2 carbon atoms; R 5 and R 6 each represents an alkyl group having from 1 to 18 carbon atoms; Y represents --COO-- when l is 1, and Y represents a single bond when l is 0; l represents 0 or 1; n represents an integer of from 1 to 18; and * indicates an optically active center.
Claim 6
Dependent Claim
125 words
A liquid crystal composition which comprises (A) a liquid crystal compound represented by formula (VI) and (B) a liquid crystal compound represented by formula (I): ##STR22## wherein R 1 represents an alkyl group having from 1 to 18 carbon atoms; R 2 represents an optically active group represented by formula (II), (III) or (IV): ##STR23## wherein R 3 represents a lower halo-alkyl group having from 1 to 2 carbon atoms; R 5 and R 6 each represents an alkyl group having from 1 to 18 carbon atoms; Y represents --COO-- when l is 1, and Y represents a single bond when l is 0; l represents 0 or 1; n represents an integer of from 1 to 18; and * indicates an optically active center.
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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) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |