US4689176A
Expired / Lapsed
US
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Novel optically active compound and liquid crystal composition containing same
Assignee: JNC Corp
•
Filing: 1985-12-20
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Granted: 1987-08-25
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Expires: 2005-12-20
Abstract
Abstract A novel optically active compound suitable for use in a display mode utilizing a ferroelectric liquid crystal, and a chiral smectic liquid crystal composition containing the same are provided, which novel optically active compound is expressed by the formula ##STR1## wherein R represents an alkyl group of 2 to 15 carbon atoms; X represents CN group or a halogen atom; Y and Z each represent a halogen atom or hydrogen atom, but either one of Y and Z is hydrogen atom; l is 1 or 2; m is 0 or 1; and a symbol * shows that the carbon atom having this symbol attached thereto constitutes an optically active center.
Inventors
- 👤 Hiromichi Inoue
- 👤 Shinichi Saito
- 👤 Kazutoshi Miyazawa
- 👤 Takashi Inukai
- 👤 Kanetsugu Terashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:55
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
An optically active compound of the formula ##STR6## wherein R represents an alkyl group of 2 to 15 carbon atoms, X represents CN or a halogen atom, Y and Z each represents a halogen atom or hydrogen but at least one of Y and Z is hydrogen, l is 1 or 2, m is 0 or 1 but l+m is 1 or 2 and the symbol * shows that the carbon atom having this symbol attached thereto constitutes an optically active center.
Claim 2
Dependent Claim
82 words
An optically active compound of the formula ##STR6## wherein R represents an alkyl group of 2 to 15 carbon atoms, X represents CN or a halogen atom, Y and Z each represents a halogen atom or hydrogen but at least one of Y and Z is hydrogen, l is 1 or 2, m is 0 or 1 but l+m is 1 or 2 and the symbol * shows that the carbon atom having this symbol attached thereto constitutes an optically active center.
Claim 3
Dependent Claim
16 words
An optically active compound according to claim 1, wherein l is 1 and m is 0.
Claim 4
Dependent Claim
16 words
An optically active compound according to claim 1, wherein l is 1 and m is 1.
Claim 5
Dependent Claim
16 words
An optically active compound according to claim 1, wherein R represents n--C 6 H 13 .
Claim 6
Dependent Claim
66 words
An optically active compound of the formula ##STR7## wherein R represents an alkyl group of 2 to 15 carbon atoms, X represents CN or a halogen atom, Y and Z each represents a halogen atom or hydrogen but at least one of Y and Z is hydrogen, and the symbol * shows that the carbon atom having this symbol attached thereto constitutes an optically active center.
Claim 7
Dependent Claim
66 words
An optically active compound of the formula ##STR7## wherein R represents an alkyl group of 2 to 15 carbon atoms, X represents CN or a halogen atom, Y and Z each represents a halogen atom or hydrogen but at least one of Y and Z is hydrogen, and the symbol * shows that the carbon atom having this symbol attached thereto constitutes an optically active center.
Claim 8
Dependent Claim
25 words
An optically active compound according to claim 5 wherein X represents CN and one of Y and Z is hydrogen and the other is F.
Claim 9
Dependent Claim
29 words
A chiral smectic liquid crystal composition having at least two components at least one of which is an optically active compound of the formula set forth in claim 1.
Claim 10
Dependent Claim
29 words
A chiral smectic liquid crystal composition having at least two components at least one of which is an optically active compound of the formula set forth in claim 5.
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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) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |