Tadashi Okuma

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Fukuoka-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Yellow hue compound and aqueous ink for ink-jet recording system us...
- Patent number 7,091,261
- Issue date Aug 15, 2006
- Mitsui Chemicals, Inc.
- Yoriaki Matsuzaki
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Anthraquinone compound and water-based ink-jet recording ink contai...
- Patent number 6,800,674
- Issue date Oct 5, 2004
- Mitsui Chemicals, Inc.
- Osamu Kohgo
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Sulfur compound and use thereof
- Patent number 6,570,025
- Issue date May 27, 2003
- Mitsui Chemicals, Inc.
- Kenichi Fujii
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Quinoline derivative and use of same
- Patent number 6,407,242
- Issue date Jun 18, 2002
- Mitsui Chemicals, Inc.
- Tadashi Okuma
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Quinoline derivative and use of same
- Patent number 6,132,640
- Issue date Oct 17, 2000
- Mitsui Chemicals, Inc.
- Tadashi Okuma
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Anthraquinone compound and water-based ink-jet recording ink contai...
- Publication number 20030078318
- Publication date Apr 24, 2003
- Osamu Kohgo
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...