Patent US4668427A successfully refreshed from Google Patents.
US4668427A
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Liquid crystal compound having methyleneoxy group and composition containing same
Assignee: JNC Corp
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Filing: 1985-09-03
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Granted: 1987-05-26
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Expires: 2005-09-03
Abstract
Abstract A novel chiral liquid crystal compound having an optically active group which affords a superior response rate when used as a liquid crystal display element, and a liquid crystal composition containing the same are provided, which chiral liquid crystal compound is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 18 carbon atoms; R* represents an optically active alkyl group of 4 to 15 carbon atoms; X represents single bond, --O--, ##STR2## Y represents --CH 2 O-- or --OCH 2 --; Z represents single bond, --O--, ##STR3## and m and n each represent 1 or 2.
Inventors
- 👤 Shinichi Saito
- 👤 Hiromichi Inoue
- 👤 Kazutoshi Miyazawa
- 👤 Takashi Inukai
- 👤 Kanetsugu Terashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:32
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/84; C07C43/00; C07C43/02; C07C43/20; C07C43/205; C07C43/2055; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A compound of the formula ##STR30## wherein R 1 represents an alkyl or alkoxy group of 1 to 18 carbon atoms; R* represents an optically active alkyl group of 4 to 15 carbon atoms; Y represents --CH 2 O-- or --OCH 2 --; and m and n each represents 1 or 2 but the total of m plus n is 3.
Claim 2
Dependent Claim
61 words
A compound of the formula ##STR30## wherein R 1 represents an alkyl or alkoxy group of 1 to 18 carbon atoms; R* represents an optically active alkyl group of 4 to 15 carbon atoms; Y represents --CH 2 O-- or --OCH 2 --; and m and n each represents 1 or 2 but the total of m plus n is 3.
Claim 3
Dependent Claim
22 words
A compound according to claim 1 wherein R* is an optically active alkyl group having one methyl group as its side chain.
Claim 4
Dependent Claim
14 words
A compound according to claim 1 wherein R* is the optically active 1-methylheptyl group.
Claim 5
Dependent Claim
10 words
A compound according to claim 1 of the formula ##STR31##
Claim 6
Dependent Claim
24 words
A chiral smectic liquid crystal composition having at least two components at least one of which is a compound set forth in claim 1.
Claim 7
Dependent Claim
21 words
A chiral smectic liquid crystal composition consisting of at least two members selected from compounds of the formula of claim 1.
Claim 8
Dependent Claim
20 words
A light switching element employing a chiral smectic liquid crystal composition according to claim 5 as a liquid crystal material.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |