4. Synthetic resins or natural rubbers -- part of the class 520 ser
  5. Synthetic resins
  6. From carboxylic acid or derivative thereof

Harry J. Gwinnell, Esquire

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Apparatus and method for molding polyester articles having low a

Plastic and nonmetallic article shaping or treating: processes – Utilizing special inert gaseous atmosphere or flushing mold...
Patent

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High clarity polyester containing sub-visual antimony phosphate

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
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Process for continuously producing polyester articles with scrap

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
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