Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
Inventor
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Method for producing closed-cell rigid polyurethane foams...
Method of producing hydrocarbon-expanded rigid polyurethane foam
Polyether polyols, polyol formulation containing them and their
Polyether polyols, polyol formulation containing them and their
Process for preparing rigid polyurethane foams
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