Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
Inventor
active
Composites of aromatic polybenzimidazoles and polyarylates
Compositions of polybenzimidazoles and polyarylates
Copolyimides derived from 2,2-bis (amino phenyl) hexafluoropropa
Glass bubble filled polybenzimidazole
Membranes prepared from blend of polybenzimidazole with polyaryl
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