Siegfried Krueger

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Speyer, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the manufacture of 4,4'-diphenyl-methane diisocyanate a...
- Patent number 4,294,666
- Issue date Oct 13, 1981
- BASF Aktiengesellschaft
- Hans J. Astheimer
- C07 - ORGANIC CHEMISTRY