Dieter Hellwig

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Bochum, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the preparation of thermosettable urea-formaldehyde res...
- Patent number 4,247,433
- Issue date Jan 27, 1981
- Th. Goldschmidt AG
- Eckehard Schamberg
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Process for the preparation of solutions of urea-formaldehyde resin...
- Patent number 4,198,332
- Issue date Apr 15, 1980
- Th. Goldschmidt AG
- Arnold Laqua
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...