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Patent US4882085A successfully refreshed from Google Patents.
US4882085A
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Lactic acid derivative and liquid crystal composition containing same
Assignee: Canon Inc
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Filing: 1988-12-28
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Granted: 1989-11-21
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Expires: 2008-12-28
Abstract
Abstract An optically active lactic acid derivative represented by the following formula (I): ##STR1## wherein R represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; l is 0 or 1; m is 1 or 2; A represents a group selected from the following groups (a) and (b): (a) hydroxyl group, halogen, benzyloxy group, phenoxy group, toluenesulfonic acid group, acetyloxy group trifluoroacetyloxy group; ##STR2## (wherein R' is an alkyl group or alkoxy group having 4 to 18 carbon atoms, n is 0 or 1, ##STR3## with proviso that when A is selected from the group in the above group (a), l is 1 and m is 1 or 2; and when A is selected from the groups in the above group (b), m=n=1 when l is 0, or m and n are 0, 1 or 2 and m+n is 1 or 2 when l is 1, and ##STR4##
Inventors
- 👤 Kazuo Yoshinaga
- 👤 Kazuharu Katagiri
- 👤 Akira Tsuboyama
- 👤 Hiroyuki Kitayama
- 👤 Kenji Shinjo
- 👤 Chieko Hioki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:19
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07C; C07C43/00; C07C43/02; C07C43/20; C07C43/23; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/84; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
62 words
An optically active lactic acid derivative represented by the following formula (V): ##STR111## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 2
Dependent Claim
62 words
An optically active lactic acid derivative represented by the following formula (V): ##STR111## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 3
Dependent Claim
17 words
A lactic acid derivative according to claim 1, wherein said R has 4 to 16 carbon atoms.
Claim 4
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is C 2 H 5 --, and R' is n--C 8 H 17 O--.
Claim 5
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 3 H 7 --, and R' is n--C 8 H 17 O--.
Claim 6
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is C 2 H 5 --, and R' is n--C 10 H 21 O--.
Claim 7
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 3 H 7 --, and R' is n--C 10 H 21 O--.
Claim 8
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 12 H 25 , and R' is n--C 5 H 11 O--.
Claim 9
Dependent Claim
37 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, m is 1, n is 1, R is n--C 12 H 25 --, and R' is n--C 12 H 25 O--.
Claim 10
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 8 H 17 --, and R' is n--C 8 H 17 O--.
Claim 11
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 5 H 11 --, and R' is n--C 16 H 33 O--.
Claim 12
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 1, n is 1, R is n--C 8 H 17 --, and R' is n--C 7 H 15 O--.
Claim 13
Dependent Claim
34 words
A lactic acid derivative according of claim 1, wherein, in the formula (V), m is 1, n is 0, R is n--C 6 H 11 , and R' is n--C 12 H 25 O--.
Claim 14
Dependent Claim
34 words
A lactic acid derivative according to claim 1, wherein, in the formula (V), m is 2, n is 0, R is n--C 5 H 11 --, and R' is n--C 10 H 21 O--.
Claim 15
Dependent Claim
74 words
A chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR112## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 16
Dependent Claim
74 words
A chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR112## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 17
Dependent Claim
17 words
A liquid crystal composition according to claim 14, wherein said R has 4 to 16 carbon atoms.
Claim 18
Dependent Claim
124 words
A liquid crystal composition, which comprises containing at least one of optically active lactic acid derivatives represented by the formula (IV): ##STR113## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents an alkyl group or alkoxy group having 4 to 18 carbon atoms; and ##STR114## and at least one of optically active lactic acid derivatives represented by the following formula (V): ##STR115## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 19
Dependent Claim
124 words
A liquid crystal composition, which comprises containing at least one of optically active lactic acid derivatives represented by the formula (IV): ##STR113## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents an alkyl group or alkoxy group having 4 to 18 carbon atoms; and ##STR114## and at least one of optically active lactic acid derivatives represented by the following formula (V): ##STR115## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 20
Dependent Claim
17 words
A liquid crystal composition according to claim 16, wherein said R has 4 to 16 carbon atoms.
Claim 21
Dependent Claim
67 words
A liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR116## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 22
Dependent Claim
67 words
A liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR116## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 23
Dependent Claim
89 words
A liquid crystal device comprising a pair of oppositely spaced electrodes and a liquid crystal composition disposed between the oppositely spaced electrodes; said liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR117## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 24
Dependent Claim
89 words
A liquid crystal device comprising a pair of oppositely spaced electrodes and a liquid crystal composition disposed between the oppositely spaced electrodes; said liquid crystal composition comprising at least one optically active lactic acid derivative represented by the formula ##STR117## wherein R is a linear alkyl group having 1 to 18 carbon atoms; C* is an asymmetric carbon atom; R' is a linear alkyl group or an alkoxy group having 5 to 16 carbon atoms, m is 1 or 2; n is 0 or 1 and m+n=1 or 2.
Claim 25
Dependent Claim
101 words
A ferroelectric liquid crystal device, which comprises a pair or oppositely spaced electrodes and a chiral smectic liquid crystal composition disposed between the oppositely spaced electrodes; said chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR118## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; and n is 0 or 1 and m+n=1 or 2.
Claim 26
Dependent Claim
101 words
A ferroelectric liquid crystal device, which comprises a pair or oppositely spaced electrodes and a chiral smectic liquid crystal composition disposed between the oppositely spaced electrodes; said chiral smectic liquid crystal composition consisting of at least two compounds and containing at least one compound represented by the following formula (V): ##STR118## wherein R represents a linear, saturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; R' represents a linear alkyl group or alkoxy group having 5 to 16 carbon atoms; m is 1 or 2; and n is 0 or 1 and m+n=1 or 2.
References Cited (Backward Citations)
JPS57176267A
Cited
US4576732A
Cited
US4596667A
Cited
US4650600A
Cited
US4725688A
Cited
US4744918A
Cited
US4556727A
Cited
EP0175591A2
Cited
US4775223A
Cited
WO1986002937A1
Cited
WO1986002938A1
Cited
US4638073A
Cited
US4812259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |