4. Synthetic resins or natural rubbers -- part of the class 520 ser
  5. Synthetic resins
  6. From phenol, phenol ether, or inorganic phenolate

Duane Treybig

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Method and composition for recovering hydrocarbon fluids...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate

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Method and composition for recovering hydrocarbon fluids...

Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate

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