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US4548731A Expired / Lapsed US ⏱️ 0.0 years remaining

2,4-Difluorobenzene derivatives

Assignee: JNC Corp

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Filing: 1983-05-12

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Granted: 1985-10-22

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Expires: 2003-05-12

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Abstract

Abstract Novel compounds having a small dielectric anisotropy value (Δε), a low viscosity and a small γ value (ratio of saturation voltage to threshold voltage) indicating sharpness, and liquid crystal compositions containing the same are provided, which compounds are 2,4-difluorobenzene derivatives of trans-4-alkylcyclohexanes expressed by the general formula ##STR1## wherein n is 1 or 2, m is 0 or 1 and R represents an alkyl group of 1-10 carbon atoms.

Inventors

👤 Shigeru Sugimori
👤 Tetsuhiko Kojima

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-25 07:08

CPC Classifications

C; C07; C07C; C07C17/00; C07C17/35; C07C17/354; C07C25/00; C07C25/18; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C09K19/3066; C09K19/3068

Claims Analysis

Total Claims: 13

Claim 1

Independent Claim 50 words

2,4-Difluorobenzene derivatives of trans-4-alkylcyclohexanes expressed by the general formula ##STR5## wherein m represents 0 or 1; and further wherein if m represents 1, then n represents 1 or 2 and if m represents 0, then n represents 2 and R represents an alkyl group of 1 to 10 carbon atoms.

Claim 2

Dependent Claim 50 words

Claim 3

Dependent Claim 29 words

Compounds according to claim 1, expressed by the general formula ##STR6## wherein n represents 1 or 2 and R represents an alkyl group of 1 to 10 carbon atoms.

Claim 4

Dependent Claim 23 words

Compounds according to claim 1, expressed by the general formula ##STR7## wherein R represents an alkyl group of 1 to 10 carbon atoms.

Claim 5

Dependent Claim 20 words

A liquid crystal material comprising a mixture of compounds at least one of which is compound according to claim 1.

Claim 6

Dependent Claim 11 words

Compounds according to claim 1, expressed by the general formula ##STR8##

Claim 7

Dependent Claim 11 words

Compounds according to claim 1, expressed by the general formula ##STR9##

Claim 8

Dependent Claim 41 words

A liquid crystal composition comprising 85% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; 15% by weight of trans-4-pentyl-(4"-cyanobiphenyl)cyclohexane; and 15% by weight of trans-4-pentylcyclohexanecarboxylic acid-2,4-difluorophenyl ester.

Claim 9

Dependent Claim 41 words

Claim 10

Dependent Claim 42 words

A liquid crystal composition comprising 85% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; and 15% by weight of trans-4-pentyl(4"-cyanobiphenyl)cyclohexane; and 15% by weight of trans-4-hexylcyclohexanecarboxylic acid-2,4-difluorophenyl ester.

Claim 11

Dependent Claim 42 words

A liquid crystal composition comprising 85% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; and 15% by weight of trans-4-pentyl(4"-cyanobiphenyl)cyclohexane; and 15% by weight of trans-4-hexylcyclohexanecarboxylic acid-2,4-difluorophenyl ester.

Claim 12

Dependent Claim 52 words

A liquid crystal composition comprising 80% by weight of a composition consisting of: 24% by weight of trans-4-propyl-(4'-cyanophenyl)cyclohexane; 36% by weight of trans-4-pentyl-(4'-cyanophenyl)cyclohexane; 25% by weight of trans-4-heptyl-(4'-cyanophenyl)cyclohexane; and 15% by weight of trans-4-pentyl-(4"-cyanobiphenyl)cyclohexane; and 5% by weight of 2,4-difluoro-(trans-4-(trans-4-propylcyclohexyl)cyclohexyl)benzene; 10% by weight of 2,4-difluoro-(trans-4-(trans-4-butylcyclohexyl)cyclohexyl)benzene; and 5% by weight of 2,4-difluoro-(trans 4-(trans-4-heptylcyclohexyl)cyclohexyl)benzene.

Claim 13

Dependent Claim 52 words

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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)	1988-10-21	1989-04-22	1989-10-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-10-21	1993-04-22	1993-10-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-10-21	1997-04-22	1997-10-22	$7700.00	Window Closed / Lapsed

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