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US4728458A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyphenyl-based ester compounds and liquid crystal compositions containing same

Assignee: Ajinomoto Co Inc
•
Filing: 1986-02-10
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Granted: 1988-03-01
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Expires: 2006-02-10
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Abstract

Abstract Polyphenyl-based liquid crystal compounds represented by the following general formula (1) and liquid crystal composition containing the same: ##STR1## wherein R 1 represents a straight or branched C 1-18 alkyl group, haloalkyl group, aralkyl group or haloaralkyl group with or without optically active carbon, R 2 represents a straight or branched C 1-6 alkyl group, haloalkyl group or aralkyl group with or without optically active carbon, W represents (1) --OCO-- or --COO--, in which case T represents a halogen atom or a methyl group, or (2) a single bond, --O-- or --OCOO--, in which case T represents a halogen atom, X represents --OCO--, --COO--, --C.tbd.C--, --CH═N--, --N═CH, Y represents single bond, --O--, --COO--, --OCO--, --CH 2 --, --OCH 2 --, --COOCH 2 -- or --OCOCH 2 --, Z 1 and Z 2 represent a hydrogen or halogen atom, a cyano group or nitro group, Z 1 may be the same or different from Z 2 , l and m are one or more than one each and a total of l and m is three or more than three, the carbon atom marked with * is an asymmetric carbon atom.

Inventors

  • 👤 Ryoichi Higuchi
  • 👤 Takao Sakurai
  • 👤 Tatsuru Tabohashi
  • 👤 Naoko Mikami
  • 👤 Kiriko Akaiwa
  • 👤 Eri Yamamoto
  • 👤 Koji Takeuchi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 10:30
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/12; C09K19/126

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 61 words
A smectic liquid crystal compound having the following formula: ##STR64## wherein R 1 represents straight or branched C 1-18 alkyl group with or without optically active carbon, R 2 represents straight or branched C 1-6 group, X is --COO-- or --OCO--, Y is --COOCH 2 --, --COO--, --OCOCH 2 , the carbon atom marked with * is an asymmetric carbon atom.
Claim 2
Dependent Claim 61 words
A smectic liquid crystal compound having the following formula: ##STR64## wherein R 1 represents straight or branched C 1-18 alkyl group with or without optically active carbon, R 2 represents straight or branched C 1-6 group, X is --COO-- or --OCO--, Y is --COOCH 2 --, --COO--, --OCOCH 2 , the carbon atom marked with * is an asymmetric carbon atom.
Claim 3
Dependent Claim 67 words
A smectic liquid crystal compound having the following formula: ##STR65## wherein R 1 represents straight or branched C 1-18 alkyl group with or without optically active carbon, R 2 represents straight or branched C 1-6 alkyl group, X is --OCO--O or --COO--, Y is --OCO-- or --COOCH 2 --, T is a halogen or methyl group, the carbon atom marked with * is an asymmetric carbon atom.
Claim 4
Dependent Claim 67 words
A smectic liquid crystal compound having the following formula: ##STR65## wherein R 1 represents straight or branched C 1-18 alkyl group with or without optically active carbon, R 2 represents straight or branched C 1-6 alkyl group, X is --OCO--O or --COO--, Y is --OCO-- or --COOCH 2 --, T is a halogen or methyl group, the carbon atom marked with * is an asymmetric carbon atom.
Claim 5
Dependent Claim 14 words
A liquid crystal composition containing a smectic liquid crystal compound according to claim 1.
Claim 6
Dependent Claim 14 words
A liquid crystal composition containing a smectic liquid crystal compound according to claim 2.

References Cited (Backward Citations)

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JPS6122051A Cited
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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) 1991-03-01 1991-08-31 1992-03-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-03-01 1995-08-31 1996-03-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-03-01 1999-08-31 2000-03-01 $7700.00 Window Closed / Lapsed

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