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US5116531A
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Liquid crystal compound
Assignee: Showa Shell Sekiyu KK
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Filing: 1990-08-28
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Granted: 1992-05-26
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Expires: 2010-08-28
Abstract
Abstract A liquid crystal compound represented by formula (I): ##STR1## wherein R 1 represents an alkyl group having from 5 to 18 carbon atoms; R 2 represents an alkyl group having from 4 to 15 carbon atoms; X represents a single bond, --O--, ##STR2## and * indicates an optically active center. The compound exhibits three stable states of molecular orientation.
Inventors
- 👤 Takashi Hagiwara
- 👤 Noriko Yamakawa
- 👤 Ichiro Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:24
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/02; C09K19/0266; C07; C07C; C07C69/00; C07C69/76; C07C69/84; C07C69/90; C07C69/94; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
A liquid crystal compound represented by formula (I): ##STR15## wherein R 1 represents a straight chain alkyl group having from 5 to 18 carbon atoms; R 2 represents a straight chain alkyl group having from 4 to 15 carbon atoms; X represents ##STR16## and indicates an optically active center, which exhibits three stable states.
Claim 2
Dependent Claim
54 words
A liquid crystal compound represented by formula (I): ##STR15## wherein R 1 represents a straight chain alkyl group having from 5 to 18 carbon atoms; R 2 represents a straight chain alkyl group having from 4 to 15 carbon atoms; X represents ##STR16## and indicates an optically active center, which exhibits three stable states.
Claim 3
Dependent Claim
41 words
A liquid crystal compound as claimed in claim 1, wherein R 1 represents a straight chain alkyl group having from 6 to 12 carbon atoms; and R 2 represents a straight chain alkyl group having from 5 to 12 carbon atoms.
Claim 4
Dependent Claim
23 words
A liquid crystal compound as claimed in claim 1, which is in the S * (3) phase, and which has three stable states.
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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) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |