Kaneo Yokoyama

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Nara, JP

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Patents Grantslast 30 patents

Information Patent Grant
Azo compound and a polarizing film containing the same
- Patent number 5,700,296
- Issue date Dec 23, 1997
- Sumitomo Chemical Company, Limited
- Kazuya Ogino
- B32 - LAYERED PRODUCTS
Information Patent Grant
Tetrakisazo compound and a polarizing film containing the same
- Patent number 5,659,020
- Issue date Aug 19, 1997
- Sumitomo Chemical Company, Limited
- Kazuya Ogino
- G02 - OPTICS
Information Patent Grant
Metallized formazan compounds having two fiber reactive groups link...
- Patent number 4,935,500
- Issue date Jun 19, 1990
- Sumitomo Chemical Company, Limited
- Takashi Omura
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for producing anthraquinone compounds
- Patent number 4,299,771
- Issue date Nov 10, 1981
- Sumitomo Chemical Company, Limited
- Akira Takeshita
- C07 - ORGANIC CHEMISTRY