Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
Inventor
active
Aromatic polyformal-polycarbonate block polymers and method for
Liquid extraction method for recovering aromatic bisimides
Polyetherimides prepared by self-condensation of hydroxyaryl pht
Preparation of aromatic bisimides
Preparation of aromatic tetracarboxylic acids
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