Klaus-Dieter Hellwig

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Bad Honnef, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for covering silicas with wax
- Patent number 6,921,781
- Issue date Jul 26, 2005
- Degussa AG
- Juergen Schubert
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Doped precipitated silica
- Patent number 6,800,267
- Issue date Oct 5, 2004
- Degussa AG
- Jürgen Schubert
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for preparation of alkali metal selenates
- Patent number 4,536,383
- Issue date Aug 20, 1985
- Degussa Aktiengesellschaft
- Lothar Kaufmann
- C01 - INORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Doped precipitated silica
- Publication number 20020061404
- Publication date May 23, 2002
- Degussa Ag
- Juergen Schubert
- C01 - INORGANIC CHEMISTRY
Information Patent Application
Process for covering silicas with wax
- Publication number 20020055556
- Publication date May 9, 2002
- Juergen Schubert
- C01 - INORGANIC CHEMISTRY