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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4676924 B1

PDFFull Text
Date of Patent:
Jun. 30, 1987

Filed:

Jun. 28, 1985

Liquid crystalline isothiocyanates with dioxane ring and liquid

Applicant:
Inventors:

Roman Dabrowski, Warsaw, PL;

Jerzy Dziaduszek, Warsaw, PL;

Jaroslaw Szulc, Warsaw, PL;

Zygfryd Witkiewicz, Warsaw, PL;

Zofia Stolarz, Warsaw, PL;

Krystyna Kenig, Warsaw, PL;

Gabriela Adamska, Warsaw, PL;

Assignee:

Wojskowa Akademia Techniczna, Warsaw, PL;

Attorney:
Primary Examiner:

Dolph H Torrence

Int. Cl.
CPC ...
C09K / ; C09D / ;
U.S. Cl.
CPC ...
25229961 ; 2522991 ; 2522992 ; 549371 ; 549372 ; 549373 ;
Abstract

New compounds of the general formula: ##STR1## wherein the symbols X stand for carbon atom bonded with two hydrogen atoms /--CH.sub.2 -- group/ and the symbols Z stand for oxygen atom or the symbols X stand for oxygen atom and the symbols Z stand for carbon atom bonded with two hydrogen atoms /--CH.sub.2 -- group/, m is an integer of 1 to 2, R represents an alkyl /H.sub.2n+1 C.sub.n / or an 4-alkylphenyl /H.sub.2n+1 C.sub.n --C.sub.6 H.sub.4 / or an alkylbiphenyl /H.sub.2n+1 C.sub.n --C.sub.6 H.sub.4 --C.sub.6 H.sub.4 / or an alkylcyclohexylphenyl group /H.sub.2n+1 C.sub.n --C.sub.6 H.sub.10 --C.sub.6 H.sub.4 /, the term alkyl group signifies an alkyl chain containing 1 to 15 carbon atoms or it also signifies a branched-chain alkyl group C.sub.2 H.sub.5 --CH/CH.sub.3 /--/CH.sub.2 /.sub.k where k in an integer of 1 to 3, have utility as liquid crystals. A process for manufacture of compounds of the general formula I. Liquid crystalline admixtures containing those compounds and a way of selection of their compositions to obtain the admixtures which exhibit smectic, smectic and nematic or only smectic properties as well as their use in electrooptical devices is described.

Find Patent Forward Citations

Dabrowski, Roman. (1987). Liquid crystalline isothiocyanates with dioxane ring and liquid (U.S. Patent No. 4676924). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4676924

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