Pekka J. Vapaaoksa

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Patents Grantslast 30 patents

Information Patent Grant
Transparent metal oxide pigment and method for its preparation
- Patent number 5,076,849
- Issue date Dec 31, 1991
- Kemira Oy.
- Pekka J. Vapaaoksa
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Colored nacreous pigment and a method for its preparation
- Patent number 5,061,317
- Issue date Oct 29, 1991
- Kemira Oy.
- Taina M. Korpi
- C01 - INORGANIC CHEMISTRY