Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
Inventor
active
Integral skin rigid urethane foam
Microcellular elastomers with improved processability and proper
Process for making microcellular polyurethane elastomers
Water-blown integral skin polyurethane foams having a skin with
Water-blown integral skin polyurethane foams having a skin with
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