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

Frank R. Keith

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Process and apparatus for extruding mixtures of thermoplastic an

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

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Process for extruding mixtures of thermoplastic and thermoset ma

Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of gaseous process material
Patent

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