U.S. federal trademark · Serial No. 79043488
Dyestuff and dye intermediates; sodium thiocyanate; 4,4'-dihydroxydiphenylsulfone; 4,4'-dichlorodiphenylsulfone; 2,4'-dihydroxydiphenylsulfone; 4-hydroxy-4-isoproxydiphenylsulfone; liquid crystal chemicals
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