4. Synthetic resins or natural rubbers -- part of the class 520 ser
  5. Synthetic resins
  6. From reactant having at least one -n=c=x group as well as...

Ronald O. Rosenberg

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Ether-based polyurethane elevator sheave liner-polyurethane-urea

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent

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Low free toluene diisocyanate polyurethanes

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent

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Radiation-curable polyurethane

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate

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