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Haruhisa Yamamoto
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last 30 patents
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Patent Grant
Process for preparation of rubber composition and rubber composition
Patent number
5,312,849
Issue date
May 17, 1994
Nippon Zeon Co., Ltd.
Shuichi Akita
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Magnetic powder for magnetic recording media
Patent number
5,062,982
Issue date
Nov 5, 1991
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Magnetic powder for magnetic recording media
Patent number
5,062,983
Issue date
Nov 5, 1991
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information
Patent Grant
Method of producing magnetic recording media
Patent number
5,055,322
Issue date
Oct 8, 1991
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic powder for magnetic recording
Patent number
4,820,433
Issue date
Apr 11, 1989
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
G11 - INFORMATION STORAGE
Information
Patent Grant
Process for producing butadiene
Patent number
4,595,788
Issue date
Jun 17, 1986
Nippon Zeon Co. Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing methacrylic acid
Patent number
4,564,703
Issue date
Jan 14, 1986
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for producing conjugated diolefins
Patent number
4,547,615
Issue date
Oct 15, 1985
Nippon Zeon Co. Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for producing conjugated diolefins
Patent number
4,423,281
Issue date
Dec 27, 1983
Nippon Zeon Co. Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for producing conjugated diolefins
Patent number
4,336,409
Issue date
Jun 22, 1982
Nippon Zeon Co. Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Catalyst for oxidation of isobutylene
Patent number
4,272,637
Issue date
Jun 9, 1981
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Oxidation of unsaturated aldehydes
Patent number
4,245,118
Issue date
Jan 13, 1981
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing spherical shaped pelletized oxide catalysts c...
Patent number
4,238,359
Issue date
Dec 9, 1980
Nippon Zeon Co. Ltd.
Shinichi Akiyama
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of acrylic acid
Patent number
4,220,802
Issue date
Sep 2, 1980
Nippon Zeon Co. Ltd.
Shinichi Akiyama
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Catalysts for the oxidation of unsaturated aldehydes
Patent number
4,209,640
Issue date
Jun 24, 1980
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Oxidation of olefins
Patent number
4,186,152
Issue date
Jan 29, 1980
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Oxidation of olefins
Patent number
4,155,938
Issue date
May 22, 1979
Nippon Zeon Co., Ltd.
Haruhisa Yamamoto
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing unsaturated carboxylic acids
Patent number
4,113,770
Issue date
Sep 12, 1978
Nippon Zeon Co. Ltd.
Shinichi Akiyama
C07 - ORGANIC CHEMISTRY