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US4313878A Expired / Lapsed US ⏱️ 0.0 years remaining

4-Substituted phenyl 4'-(5-n-alkyl-1,3-dioxan-2-yl)benzoates

Assignee: MERECK PATENT FRANKFURTER STRASSE 250 6100 DARMSTADT A Co OF GERMANY GmbH
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Filing: 1980-12-03
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Granted: 1982-02-02
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Expires: 2000-12-03
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Abstract

Abstract Disclosed are compounds of the formula: ##STR1## wherein R 1 is an alkyl group and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 . The compounds of the invention are useful as liquid crystal materials in electrooptical displays. Also disclosed are novel admixtures of the above benzoate compounds with cyanophenyl dioxane compounds, these admixtures being especially useful for multiplexed electrooptical displays. Preferred admixtures include at least about 40 weight percent of the above benzoate compounds and at least about 40 weight percent of cyanophenyl dioxane compounds with other liquid crystalline compounds such as phenyl cyclohexanecarboxylate, biphenyl and/or phenyl benzoate liquid crystalline compounds also being present in amounts up to about 20 weight percent.

Inventors

  • 👤 Ying Y. Hsu

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 14:33
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C07; C07D; C07D319/00; C07D319/04; C07D319/06; C09K19/42; C09K2019/3422

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 35 words
A compound of the formula: ##STR13## where R 1 is an alkyl group and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
Claim 2
Dependent Claim 35 words
A compound of the formula: ##STR13## where R 1 is an alkyl group and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
Claim 3
Dependent Claim 45 words
A liquid crystal compound of the formula: ##STR14## where R 1 is a straight chain alkyl group having 1 to 10 carbon atoms, and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
Claim 4
Dependent Claim 45 words
A liquid crystal compound of the formula: ##STR14## where R 1 is a straight chain alkyl group having 1 to 10 carbon atoms, and R 2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO 2 .
Claim 5
Dependent Claim 22 words
A liquid crystal compound having the formula: ##STR15## where R 1 and R 2 can be the same or different alkyl group.
Claim 6
Dependent Claim 22 words
A liquid crystal compound having the formula: ##STR15## where R 1 and R 2 can be the same or different alkyl group.
Claim 7
Dependent Claim 23 words
The liquid crystal compound of claim 3 where R 1 and R 2 can be the same or different straight chain alkyl group.
Claim 8
Dependent Claim 17 words
The liquid crystal compound of claim 4 wherein R 1 is propyl and R 2 is pentyl.
Claim 9
Dependent Claim 17 words
The liquid crystal compound of claim 4 wherein R 1 is propyl and R 2 is heptyl.

References Cited (Backward Citations)

SU481604A2 Cited
US4085222A Cited
US4229315A Cited
DD139867A1 Cited
DD139852A1 Cited
US4200580A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-02-01 1985-08-03 1986-02-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-02-01 1989-08-03 1990-02-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-02-01 1993-08-03 1994-02-02 $7700.00 Window Closed / Lapsed

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