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

Gordon Calundann

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Cholesteric phase-forming polymers, process for their preparatio

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
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High-molecular-weight polyazoles used as proton conducting...

Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
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Process for the preparation of nitrogen-containing polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
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Proton conducting electrolyte membrane having reduced...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
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Proton conducting polymer membrane comprising phosphonic...

Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
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