Oblon, Fisher, Spivak, McClelland & Maier
Dichroic azo dyestuffs and liquid crystal composition containing said dyestuffs
 Provided are novel dichroic azo dyestuffs, which contain skeletons represented by the following general formula: ##STR1## at one terminals of the long axes of the molecules of the azo dyestuffs, and liquid crystal compositions containing the dichroic azo dyestuffs in forms dissolved in liquid crystals. These dichroic azo dyestuffs have large dichroic ratios and high durability, and their compositions are employed as useful display devices. 
Mitsui Toatsu Chemicals, Incorporated
C C C C
C09K C09B C09B C09B
inventional inventional inventional inventional
Kimitoshi Hiroshi Yasuyuki Tsutomu Keisuke
Kato Aiga Yamada Nishizawa Takuma