Shuji Ichikawa

Person

Tsukuba, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Liquid storage member for coating tools
- Patent number 11,780,258
- Issue date Oct 10, 2023
- Mitsubishi Pencil Company, Limited
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Ink reservoir unit for writing instruments and writing instruments
- Patent number 11,679,618
- Issue date Jun 20, 2023
- Mitsubishi Pencil Company, Limited
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Ink composition for writing instrument and coloring material
- Patent number 9,790,384
- Issue date Oct 17, 2017
- Mitsubishi Pencil Company, Limited
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Colorant, microcapsule pigment prepared by using the same and ink c...
- Patent number 9,315,672
- Issue date Apr 19, 2016
- Mitsubishi Pencil Company, Limited
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Oil-based ink composition for writing utensil and writing utensil e...
- Patent number 7,794,533
- Issue date Sep 14, 2010
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Oil-based ink composition for ballpoint pen and ball-point pen usin...
- Patent number 7,521,491
- Issue date Apr 21, 2009
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Oil-based ink composition for ballpoint pen using oil-based ink
- Patent number 7,462,229
- Issue date Dec 9, 2008
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Follower for non-aqueous ball point pen and non-aqueous ball point pen
- Patent number 7,311,459
- Issue date Dec 25, 2007
- Mitsubishi Pencil Kabushiki Kaisha
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Oil-base ballpoint ink composition and oily ballpoint pens
- Patent number 7,172,648
- Issue date Feb 6, 2007
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Oil-based ballpoint pen ink composition and oil-based ballpoint pen
- Patent number 7,071,245
- Issue date Jul 4, 2006
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Ink reservoir for writing instrument
- Patent number 7,056,052
- Issue date Jun 6, 2006
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Ballpoint pen oil-based ink composition and ballpoint pens
- Patent number 6,786,956
- Issue date Sep 7, 2004
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for producing norbornene derivative having organosilyl group
- Patent number 6,777,570
- Issue date Aug 17, 2004
- Mitsubishi Chemical Corporation
- Hiroko Takahashi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing 1H-3-aminopyrrolidine and derivatives thereof
- Patent number 6,531,594
- Issue date Mar 11, 2003
- Mitsubishi Chemical Corporation
- Michi Watanabe
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for purifying homocystine
- Patent number 6,077,971
- Issue date Jun 20, 2000
- Mitsubishi Chemical Corporation
- Jun Takehara
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Ink composition
- Patent number 6,051,629
- Issue date Apr 18, 2000
- Mitsubishi Pencil Kabushiki Kaisha
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Ink composition for writing instrument
- Patent number 6,048,914
- Issue date Apr 11, 2000
- Mitsubishi Pencil Kabushiki Kaisha
- Kazumi Goto
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Oil base ink composition
- Patent number 5,980,624
- Issue date Nov 9, 1999
- Mitsubishi Pencil Kabushiki Kaisha
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Method for producing homocystine
- Patent number 5,847,205
- Issue date Dec 8, 1998
- Mitsubishi Chemical Corporation
- Jun Takehara
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the selective hydroformylation of terminal olefin group...
- Patent number 5,606,079
- Issue date Feb 25, 1997
- Mitsubishi Chemical Corporation
- Shuji Ichikawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Alkylene sulfide group-containing prepolymer, polymerizable composi...
- Patent number 5,594,090
- Issue date Jan 14, 1997
- NOF Corporation
- Tsuyoshi Miyazaki
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Trioxane derivatives, and method for the chemiluminescence
- Patent number 5,348,890
- Issue date Sep 20, 1994
- NOF Corporation
- Shuji Ichikawa
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 2-hexene-1,6-dial
- Patent number 5,254,742
- Issue date Oct 19, 1993
- Mitsubishi Petrochemical Co., Ltd.
- Yuji Ohgomori
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing allyl-substituted phenol compound and the pro...
- Patent number 5,087,766
- Issue date Feb 11, 1992
- Mitsubishi Petrochemical Co., Ltd.
- Kaoru Kanayama
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Polyalkenylphenol compound
- Patent number 4,978,810
- Issue date Dec 18, 1990
- Mitsubishi Petrochemical Co., Ltd.
- Kaoru Kanayama
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
INK COMPOSITION FOR WATER-BASED BALLPOINT PEN
- Publication number 20230167316
- Publication date Jun 1, 2023
- MITSUBISHI PENCIL COMPANY, LIMITED
- Shuji ICHIKAWA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
LIQUID STORAGE MEMBER FOR COATING TOOLS
- Publication number 20220355612
- Publication date Nov 10, 2022
- MITSUBISHI PENCIL COMPANY, LIMITED
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
INK RESERVOIR UNIT FOR WRITING INSTRUMENTS AND WRITING INSTRUMENTS
- Publication number 20220176728
- Publication date Jun 9, 2022
- MITSUBISHI PENCIL COMPANY, LIMITED
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
MICROCAPSULE PIGMENT AND AQUEOUS INK COMPOSITION FOR WRITING INSTRU...
- Publication number 20190010344
- Publication date Jan 10, 2019
- MITSUBISHI PENCIL COMPANY, LIMITED
- Shuji ICHIKAWA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
FUNCTIONAL PARTICLE PIGMENT
- Publication number 20180187015
- Publication date Jul 5, 2018
- MITSUBISHI PENCIL COMPANY, LIMITED
- Shuji ICHIKAWA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
INK COMPOSITION FOR WRITING INSTRUMENT AND COLORING MATERIAL
- Publication number 20160068694
- Publication date Mar 10, 2016
- MITSUBISHI PENCIL COMPANY, LIMITED
- Shuji ICHIKAWA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
COLORANT, MICROCAPSULE PIGMENT PREPARED BY USING THE SAME AND INK C...
- Publication number 20140299015
- Publication date Oct 9, 2014
- MITSUBISHI PENCIL COMPANY, LIMITED
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
Oil-Based Ink Composition for Writing Utensil and Writing Utensil E...
- Publication number 20090255439
- Publication date Oct 15, 2009
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Follower for non-aqueous ball point pen and non-aqueous ball point pen
- Publication number 20070020031
- Publication date Jan 25, 2007
- MITSUBISHI PENCIL KABUSHIKI KAISHA
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Oil-based ink composition for ballpoint pen using oil-based ink
- Publication number 20060117996
- Publication date Jun 8, 2006
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Oil-based ink composition for ballpoint pen and ball-point pen usin...
- Publication number 20050228070
- Publication date Oct 13, 2005
- MITSUBISHI PENCIL CO., LTD.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Writing ink accommodating tube
- Publication number 20050169694
- Publication date Aug 4, 2005
- Mitsubishi Pencil Co., Ltd.
- Shuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Process for producing norbornene derivative having organosilyl group
- Publication number 20040063982
- Publication date Apr 1, 2004
- MITSUBISHI CHEMICAL CORPORATION
- Hiroko Takahashi
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Method for producing 1,3-cyclohexanediol compound
- Publication number 20030149293
- Publication date Aug 7, 2003
- MITSUBISHI CHEMICAL CORPORATION
- Shuji Ichikawa
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Ballpoint pen oil-based ink composition and ballpoint pens
- Publication number 20020139280
- Publication date Oct 3, 2002
- MITSUBISHI PENCIL CO., LTD.
- Shuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Shuji Ichikawa

Person

Patents Grantslast 30 patents

Liquid storage member for coating tools

Ink reservoir unit for writing instruments and writing instruments

Ink composition for writing instrument and coloring material

Colorant, microcapsule pigment prepared by using the same and ink c...

Oil-based ink composition for writing utensil and writing utensil e...

Oil-based ink composition for ballpoint pen and ball-point pen usin...

Oil-based ink composition for ballpoint pen using oil-based ink

Follower for non-aqueous ball point pen and non-aqueous ball point pen

Oil-base ballpoint ink composition and oily ballpoint pens

Oil-based ballpoint pen ink composition and oil-based ballpoint pen

Ink reservoir for writing instrument

Ballpoint pen oil-based ink composition and ballpoint pens

Process for producing norbornene derivative having organosilyl group

Process for producing 1H-3-aminopyrrolidine and derivatives thereof

Method for purifying homocystine

Ink composition

Ink composition for writing instrument

Oil base ink composition

Method for producing homocystine

Process for the selective hydroformylation of terminal olefin group...

Alkylene sulfide group-containing prepolymer, polymerizable composi...

Trioxane derivatives, and method for the chemiluminescence

Process for preparing 2-hexene-1,6-dial

Process for producing allyl-substituted phenol compound and the pro...

Polyalkenylphenol compound

Patents Applicationslast 30 patents

INK COMPOSITION FOR WATER-BASED BALLPOINT PEN

LIQUID STORAGE MEMBER FOR COATING TOOLS

INK RESERVOIR UNIT FOR WRITING INSTRUMENTS AND WRITING INSTRUMENTS

MICROCAPSULE PIGMENT AND AQUEOUS INK COMPOSITION FOR WRITING INSTRU...

FUNCTIONAL PARTICLE PIGMENT

INK COMPOSITION FOR WRITING INSTRUMENT AND COLORING MATERIAL

COLORANT, MICROCAPSULE PIGMENT PREPARED BY USING THE SAME AND INK C...

Oil-Based Ink Composition for Writing Utensil and Writing Utensil E...

Follower for non-aqueous ball point pen and non-aqueous ball point pen

Oil-based ink composition for ballpoint pen using oil-based ink

Oil-based ink composition for ballpoint pen and ball-point pen usin...

Writing ink accommodating tube

Process for producing norbornene derivative having organosilyl group

Method for producing 1,3-cyclohexanediol compound

Ballpoint pen oil-based ink composition and ballpoint pens