Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
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Process for reducing content of unreacted vinyl halide in vinyl
Silicone-containing contact lens polymers, oxygen permeable cont
Silicone-containing contact lens polymers, oxygen permeable cont
Silicone-containing polymers, compositions and improved oxygen p
Silicone-containing polymers, oxygen permeable hydrophilic conta
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