Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
Inventor
active
Cellular polymer containing perforated cell windows and a proces
Cellular polymer containing perforated cell windows and a proces
Foaming system for closed-cell rigid polymer foam
Foaming system for rigid urethane and isocyanurate foams
Foaming system for rigid urethane and isocyanurate foams
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