EP0315958A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optically active mesomorphic compound and liquid crystal composition containing same
Assignee: Canon Inc
•
Filing: 1988-11-08
•
Granted: —
•
Expires: 2008-11-08
Abstract
Abstract An optically active mesomorphic compound represented by the formula: <CHEM> wherein R1 denotes an alkyl group having 1 - 16 carbon atoms; R2 denotes an alkyl group having 1 - 18 carbon atoms; C* is an asymmetric carbon atom; X is an oxygen atom or sulfur atom; and n is 0 or 1. The optically active mesomorphic compound, when included as a component, provides a ferroelectric liquid crystal composition showing an improved field response characteristic.
Inventors
- 👤 Shosei Mori
- 👤 Kenji Shinjo
- 👤 Takashi Iwaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 17:26
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/28; C07; C07C; C07C327/00; C07C327/20; C07C327/28; C09K19/20; C09K19/2007; C09K19/2021; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
52 words
An optically active mesomorphic compound represented by the formula: wherein R₁ denotes an alkyl group having 1 - 16 carbon atoms; R₂ denotes an alkyl group having 1 - 18 carbon atoms; C* is an asymmetric carbon atom; X is an oxygen atom or sulfur atom; and n is 0 or 1.
Claim 2
Dependent Claim
52 words
An optically active mesomorphic compound represented by the formula: wherein R₁ denotes an alkyl group having 1 - 16 carbon atoms; R₂ denotes an alkyl group having 1 - 18 carbon atoms; C* is an asymmetric carbon atom; X is an oxygen atom or sulfur atom; and n is 0 or 1.
Claim 3
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 4
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 5
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 6
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 7
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 8
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 9
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 10
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 11
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 12
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 13
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 14
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 15
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 16
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 17
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 18
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 19
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 20
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 21
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 22
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 23
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 24
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 25
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 26
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 27
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 28
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 29
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 30
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 31
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 32
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 33
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 34
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 35
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 36
Dependent Claim
8 words
A compound according to Claim 1, which is
Claim 37
Dependent Claim
27 words
A chiral smectic liquid crystal composition, comprising at least two mesomorphic compounds including an optically active mesomorphic compound represented by the formula (I) according to Claim 1.
Claim 38
Dependent Claim
28 words
A composition according to Claim 36, which comprises the optically active mesomorphic compound represented by the formula (I) and another optically active mesomorphic compound or ferroelectric liquid crystal.
Claim 39
Dependent Claim
23 words
A composition according to Claim 36, which comprises the optically active mesomorphic compound represented by the formula (I) and a non-chiral mesomorphic compound.
Claim 40
Dependent Claim
24 words
A liquid crystal device, comprising: a pair of substrates and a chiral smectic liquid crystal composition according to Claim 36 disposed between the substrates.
Claim 41
Dependent Claim
17 words
A device according to Claim 39, wherein said substrates have an electrode and an alignment control film.
Claim 42
Dependent Claim
20 words
A device according to Claim 39, which further comprises a means for applying an AC electric field to the electrodes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.