Katsumasa Kikkawa

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Patents Grantslast 30 patents

Information Patent Grant
Hair dye and hair dye composition
- Patent number 8,118,881
- Issue date Feb 21, 2012
- Hodogaya Chemical Co., Ltd.
- Masahiko Yamaguchi
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Fluoran compound
- Patent number 5,041,560
- Issue date Aug 20, 1991
- Hodogaya Chemical Co., Ltd.
- Masahiko Yamaguchi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Cycloalkene compounds useful in recording materials
- Patent number 4,987,262
- Issue date Jan 22, 1991
- Hodogaya Chemical Co., Ltd.
- Wakasugi Kazuyuki
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Heat sensitive recording sheet
- Patent number 4,839,334
- Issue date Jun 13, 1989
- Hodogaya Chemical Co, Ltd.
- Toshiyuki Abe
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
6-tetrahydrofurfurylaminofluoran compound useful as a color former...
- Patent number 4,642,663
- Issue date Feb 10, 1987
- Hodogaya Chemical Co., Ltd.
- Hideyuki Sensui
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Fluoran compounds
- Patent number 4,612,558
- Issue date Sep 16, 1986
- Hodogaya Chemical Co., Ltd.
- Mitsutoshi Anzai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
6-tetrahydrofurfurylaminofluoran compound useful as a color former
- Patent number 4,597,795
- Issue date Jul 1, 1986
- Hodogaya Chemical Co., Ltd.
- Hideyuki Sensui
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
HAIR DYE AND HAIR DYE COMPOSITION
- Publication number 20110271465
- Publication date Nov 10, 2011
- Hodogaya Chemical Co., Ltd.
- Masahiko Yamaguchi
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE