US5310500A
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Liquid crystal compounds
Assignee: Showa Shell Sekiyu KK
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Filing: 1992-06-05
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Granted: 1994-05-10
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Expires: 2012-06-05
Abstract
Abstract Antiferroelectric liquid crystal compounds are provided which have the formula <IMAGE> wherein R1 represents an alkyl group having 5-18 carbon atoms, R2 represents an alkyl group having 6-16 carbon atoms, Y represents a group <IMAGE> and A represents a group <IMAGE>
Inventors
- 👤 Yoshihiko Aihara
- 👤 Tadaaki Isozaki
- 👤 Toru Ooide
- 👤 Noriko Yamakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:36
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/02; C09K19/0266; C07; C07C; C07C69/00; C07C69/76; C07C69/84; C07C69/90; C07C69/92; C07C69/94; C09K19/04; C09K19/06; C09K19/32; C09K19/322
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
50 words
A liquid crystal compound represented by the formula (I): ##STR60## wherein; R 1 represents an alkyl group having 5-18 carbon atoms, R 2 represents an alkyl group having 6-16 carbon Y represents a group ##STR61## and A represents ##STR62## and which exhibits optically tristable states in S * (3) phase.
Claim 2
Dependent Claim
50 words
A liquid crystal compound represented by the formula (I): ##STR60## wherein; R 1 represents an alkyl group having 5-18 carbon atoms, R 2 represents an alkyl group having 6-16 carbon Y represents a group ##STR61## and A represents ##STR62## and which exhibits optically tristable states in S * (3) phase.
Claim 3
Dependent Claim
20 words
A liquid crystal compound according to claim 1 wherein A represents a group ##STR63## and Y represents a group ##STR64##
Claim 4
Dependent Claim
21 words
A liquid crystal compound represented by the following formula: ##STR65## and which exhibits optically tristable states in S * (3) phase.
Claim 5
Dependent Claim
21 words
A liquid crystal compound represented by the following formula: ##STR65## and which exhibits optically tristable states in S * (3) phase.
References Cited (Backward Citations)
US4921632A
Cited
EP0339987A2
Cited
EP0341922A2
Cited
JPH0264925A
Cited
JPH02264918A
Cited
JPH0344352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-09 | 1997-11-08 | 1998-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-09 | 2001-11-08 | 2002-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-09 | 2005-11-08 | 2006-05-10 | $7700.00 | Window Closed / Lapsed |