4. Synthetic resins or natural rubbers -- part of the class 520 ser
  5. Synthetic resins
  6. At least one aryl ring which is part of a fused or bridged...

Nippon Ester Company Ltd.

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Black liquid colorant and polyester fibers dope-dyed therewith

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent

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Colorants, polyester fibers mass-colored therewith and process f

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent

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