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

E. I. Du Pont De Nemours and Company

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Azeotrope-like compositions containing fluoroethane

Compositions – Vaporization – or expansion – refrigeration or heat or energy...
Reexamination Certificate

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Continuous process for producing poly(trimethylene...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in two or more physically distinct zones
Reexamination Certificate

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Fluorometer with low heat-generating light source

Radiant energy – Luminophor irradiation
Reexamination Certificate

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Gear for electric power steering device

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate

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Poly (trimethylene terephthalate) polymer composition

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate

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