Helmut v. Freyhold

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Dusseldorf-Oberkassel, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the manufacture of high purity silicic acid
- Patent number 4,264,564
- Issue date Apr 28, 1981
- Henkel Kommanditgesellschaft auf Aktien
- Wolfgang Friedemann
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Binders based on alkali metal silicates and potassium metaborate
- Patent number 4,171,986
- Issue date Oct 23, 1979
- Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
- Helmut v. Freyhold
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES