Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
Inventor
active
3,4-alkylenedioxy-thiophene copolymers
3,4-alkylenedioxy-thiophene copolymers
3,4-Alkylenedioxythiophene compounds and polymers thereof
3,4-alkylenedioxythiophene compounds and polymers thereof
3,4-alkylenedioxythiophenedioxide compounds and polymers...
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