US4831182A
Expired / Lapsed
US
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Biphenyl-based diester compounds and liquid crystal compositions containing same
Assignee: Ajinomoto Co Inc
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Filing: 1987-04-23
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Granted: 1989-05-16
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Expires: 2007-04-23
Abstract
Abstract A liquid crystal compound of the formula: ##STR1## wherein R 1 and R 2 represent C 1-18 alkyl group, alkyl halide group or aralkyl halide, R 1 may be the same as or different from R 2 , X is selected from --COOCH 2 -- or --OCO--.
Inventors
- 👤 Ryoichi Higuchi
- 👤 Takao Sakurai
- 👤 Naoko Mikami
- 👤 Kiriko Akaiwa
- 👤 Koji Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:01
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
48 words
A smectic liquid crystal compound of the formula ##STR21## wherein R' represents a C 1-18 alkyl group, R 2 represents a C 1-18 alkyl group or ##STR22## wherein R 3 represents a C 1-16 alkyl group and the carbon atom marked by (*) is an asymmetric carbon atom.
Claim 2
Dependent Claim
48 words
A smectic liquid crystal compound of the formula ##STR21## wherein R' represents a C 1-18 alkyl group, R 2 represents a C 1-18 alkyl group or ##STR22## wherein R 3 represents a C 1-16 alkyl group and the carbon atom marked by (*) is an asymmetric carbon atom.
Claim 3
Dependent Claim
11 words
A compound according to claim 1 wherein R 2 represents ##STR23##
Claim 4
Dependent Claim
11 words
A compound according to claim 1 wherein R 2 represents ##STR24##
Claim 5
Dependent Claim
11 words
A compound according to claim 1 wherein R 2 represents ##STR25##
Claim 6
Dependent Claim
11 words
A compound according to claim 1 wherein R 2 represents ##STR26##
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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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |