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Yojiro Kumagae
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Patents Grants
last 30 patents
Information
Patent Grant
Phthalocyanine-based compound and uses of same
Patent number
11,015,061
Issue date
May 25, 2021
Yamamoto Chemicals, Inc.
Akihiro Kohsaka
G02 - OPTICS
Information
Patent Grant
Phthalocyanine compound, process for preparing the same, and optica...
Patent number
7,332,261
Issue date
Feb 19, 2008
Ciba Specialty Chemicals Corporation
Kazuhiro Seino
G11 - INFORMATION STORAGE
Information
Patent Grant
Toner for optical fixing, manufacturing method therefor and image f...
Patent number
6,821,696
Issue date
Nov 23, 2004
Fuji Xerox Co., Ltd.
Yoshimichi Katagiri
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Phthalocyanine compounds, process for producing the same, and near...
Patent number
6,468,713
Issue date
Oct 22, 2002
Yamamoto Chemicals, Inc.
Hiroshi Terao
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Optical recording medium and dipyrromethene metal chelate compound...
Patent number
6,355,327
Issue date
Mar 12, 2002
Mitsui Chemicals, Inc.
Tsutami Misawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical recording medium and dipyrromethene metal chelate compound...
Patent number
6,162,520
Issue date
Dec 19, 2000
Mitsui Chemicals, Inc.
Tsutami Misawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Diiminoisoindoline compound and the process for producing the compo...
Patent number
6,093,832
Issue date
Jul 25, 2000
Yamamoto Chemicals, Inc.
Yojiro Kumagae
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photothermal conversion material
Patent number
6,066,729
Issue date
May 23, 2000
Yamamoto Chemicals, Inc.
Shigeo Fujita
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Phthalocyanine compound, its intermediate, process for producing th...
Patent number
5,973,140
Issue date
Oct 26, 1999
Yamamoto Chemicals, Inc.
Yojiro Kumagae
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Plasma display filter
Patent number
5,804,102
Issue date
Sep 8, 1998
Mitsui Chemicals, Inc.
Ryu Oi
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Phthalide compound and a near infrared absorber and a recording mat...
Patent number
5,627,287
Issue date
May 6, 1997
Yamamoto Chemicals, Inc.
Hiroyuki Sasaki
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Crystal modifications of 2-m-toluidino-3-methyl-6-di-n-butylaminofl...
Patent number
5,438,032
Issue date
Aug 1, 1995
Yamamoto Chemicals, Inc.
Shigeo Fujita
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Crystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino...
Patent number
5,376,617
Issue date
Dec 27, 1994
Yamamoto Chemicals, Inc.
Yojiro Kumagae
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Crystal modifications of 2-M-toluidino-3-methyl-6-di-N-butylaminofl...
Patent number
5,342,967
Issue date
Aug 30, 1994
Yamamoto Chemicals, Inc.
Shigeo Fujita
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylamino...
Patent number
5,338,866
Issue date
Aug 16, 1994
Yamamoto Chemicals, Inc.
Yojiro Kumagae
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Certain bis(benzoyl)pyridine compounds
Patent number
4,523,018
Issue date
Jun 11, 1985
Yamamoto Kagaku Gosei Co., Ltd.
Yojiro Kumagae
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
PHTHALOCYANINE-BASED COMPOUND AND USES OF SAME
Publication number
20200032066
Publication date
Jan 30, 2020
YAMAMOTO CHEMICALS, INC.
Akihiro KOHSAKA
G02 - OPTICS
Information
Patent Application
OPTICAL RECORDING MEDIUM AND AZO METAL CHELATE COMPOUND
Publication number
20100233415
Publication date
Sep 16, 2010
MITSUI CHEMICALS, INC.
Taizo Nishimoto
C07 - ORGANIC CHEMISTRY
Information
Patent Application
Trimethine Dimer Compound and Optical Recording Medium Using the Same
Publication number
20090098410
Publication date
Apr 16, 2009
MITSUI CHEMICALS, INC.
Taizo Nishimoto
G11 - INFORMATION STORAGE
Information
Patent Application
Phthalocyanine compound, process for producing the same, and optica...
Publication number
20050201265
Publication date
Sep 15, 2005
Mitsui Chemicals, Inc.
Kazuhiro Seino
G11 - INFORMATION STORAGE
Information
Patent Application
Toner for optical fixing, manufacturing method therefor and image f...
Publication number
20020150830
Publication date
Oct 17, 2002
FUJITSU LIMITED
Yoshimichi Katagiri
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Toner for optical fixing and image formation apparatus using it
Publication number
20020142240
Publication date
Oct 3, 2002
FUJITSU LIMITED
Yoshimichi Katagiri
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY