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

Bayer Materialscience Aktiengesellschaft

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Aromatic dihydroxy compound useful for the preparation of...

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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Process for producing...

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
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Production of di- and polyisocyanates of the diphenylmethane...

Organic compounds -- part of the class 532-570 series – Organic compounds – Isocyanate esters
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