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Seiji Hasegawa
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Kanagawa, JP
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last 30 patents
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Patent Grant
Process for producing polymethylene polyphenyl polycarbamates
Patent number
4,319,018
Issue date
Mar 9, 1982
Mitsui Toatsu Chemicals, Inc.
Katsuharu Miyata
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing polymethylene-polyphenyl polyisocyanates
Patent number
4,307,029
Issue date
Dec 22, 1981
Mitsui Toatsu Chemicals, Incorporated
Koichi Takeuchi
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for preparing aromatic urethanes
Patent number
4,227,008
Issue date
Oct 7, 1980
Mitsui Toatsu Chemicals, Incorporated
Katsuharu Miyata
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing aromatic urethanes
Patent number
4,178,455
Issue date
Dec 11, 1979
Mitsui Toatsu Chemicals, Incorporated
Yutaka Hirai
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for preparing aromatic urethanes
Patent number
4,170,708
Issue date
Oct 9, 1979
Mitsui Toatsu Chemicals, Incorporated
Yutaka Hirai
C07 - ORGANIC CHEMISTRY