Keiko Sanpei

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing silica particles
- Patent number 7,140,201
- Issue date Nov 28, 2006
- M. Watanabe & Co., Ltd.
- Kunio Sugiyama
- C03 - GLASS MINERAL OR SLAG WOOL

Patents Applicationslast 30 patents

Information Patent Application
High purity synthetic vitreous silica particles
- Publication number 20040213724
- Publication date Oct 28, 2004
- Masaki Kusuhara
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Application
Method for producing silica particles, synthetic quartz powder and...
- Publication number 20030005724
- Publication date Jan 9, 2003
- Kunio Sugiyama
- C01 - INORGANIC CHEMISTRY