Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
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Composition and a method for controlling reaction pressures duri
Composition and a method for controlling reaction pressures duri
Pectin and related carbohydrates for the preparation of polyuret
Polyurethane foam from cellulosic products
Polyurethane foams and processes for preparation
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