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.:
Date of Patent:
Sep. 07, 1982
Filed:
Dec. 12, 1979
Dietrich Demus, Halle, DD;
Horst Zaschke, Halle, DD;
Hans-Mathias Vorbrodt, Quedlinburg, DD;
Horst Kresse, Halle, DD;
Wolfgang Weissflog, Halle, DD;
VEB Werk fur Fernsehelektronik im Veb Kombinat Mikroelektronik, Berlin-Oberschoneweide, DD;
Abstract
Liquid crystal substituted 1,3 dioxanes and mixtures containing the same. The invention relates to liquid crystalline substituted 1,3 dioxanes and substances containing the same, for electrooptical arrays for the modulation of incident or transmitted light as well as for the reproduction of figures, symbols and images. The objects of the invention are nematic crystal liquid substances with favorable properties with respect to melting and clear points; stability toward thermal stress, effect of light, chemicals and electric fields as well as loss of color; and processes for their production. The task is solved by the creation of new nematic liquid-crystal substances. As per invention, liquid crysalline 2,5-disubstituted derivatives of 1,3-dioxane of the general formula: ##STR1## are proposed, wherein: ##STR2## The new substances are used in mixtures containing at least one of the substances according to the invention.