Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
Inventor
active
Polymers prepared from 4,4'-bis(2-(amino(halo) phenoxyphenyl) he
Polymers prepared from 4,4'-bis(2-[3,4(dicarboxyphenyl)hexafluor
Polymers prepared from 4,4'-bis[2-(3,4-(dicarboxyphenyl)hexafluo
Polymers prepared from 4,4'-bis[2-(amino (halo) phenoxyphenyl) h
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