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:
Jan. 19, 1982
Filed:
Aug. 20, 1980
Horst Zaschke, Halle, DD;
Dietrich Demus, Halle, DD;
Adalbert Wiegeleben, Halle, DD;
Uta Bottger, Halle, DD;
VEB Werk fur Fernsehelektronik im VEB Kombinat Mikroelektronik, Berlin-Oberschoneweide, DD;
Abstract
The invention relates to the application of nematic liquid-crystalline substances in electro-optical device elements for the display of numbers, symbols and images. Such nematic liquid crystals having low melting points and extremely high temperatures of transparency. The nematic liquid-crystalline substances are 5-alkyl-2-[4-acyloxyphenyl]-pyrimidines having the general formula ##STR1## wherein ##STR2## R.sup.1 =C.sub.n H.sub.2n+1, C.sub.n H.sub.2n+1 O, C.sub.n H.sub.2n+1 OCOO, C.sub.n H.sub.2n+1 COO, C.sub.n H.sub.2n+1 S, F, Cl, Br, NO.sub.2, CN CF.sub.3