Hans Unterbirker

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Opladen, DT

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of colored polyurethane foams
- Patent number 3,994,835
- Issue date Nov 30, 1976
- Bayer Aktiengesellschaft
- Karlheinz Wolf
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...