Yoshihito Akiyama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Composition of epoxy resin, polyphenolic compound and trisubstitute...
- Patent number 7,442,729
- Issue date Oct 28, 2008
- Sumitomo Baeklite Company Limited
- Akiko Okubo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Curing accelerator, epoxy resin composition, and semiconductor device
- Patent number 7,074,738
- Issue date Jul 11, 2006
- Sumitomo Bakelite Company Limited
- Akiko Okubo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Composition of polyepoxide, phenolic co-condensate and phosphonium-...
- Patent number 6,664,344
- Issue date Dec 16, 2003
- Sumitomo Bakelite Company Limited
- Hiromi Oki
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
Curing accelerator, epoxy resin composition, and semiconductor device
- Publication number 20060258822
- Publication date Nov 16, 2006
- Akiko Okubo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Curing accelerator, epoxy resin composition, and semiconductor device
- Publication number 20040039154
- Publication date Feb 26, 2004
- Akiko Okubo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...