Yutaka Hirai

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Omuta, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for the preparation of 5,6,7,8-tetrahydrofolic acid
- Patent number 4,665,176
- Issue date May 12, 1987
- Mitsui Toatsu Chemicals, Incorporated
- Yutaka Hirai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing alicyclic isocyanates
- Patent number 4,299,766
- Issue date Nov 10, 1981
- Mitsui Toatsu Chemicals, Inc.
- Ryuichi Yamamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing an aromatic urethane
- Patent number 4,186,269
- Issue date Jan 29, 1980
- Mitsui Toatsu Chemicals, Incorporated
- Yutaka Hirai
- 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
Information Patent Grant
Process for purifying crude p-aminophenol
- Patent number 4,139,562
- Issue date Feb 13, 1979
- Mitsui Toatsu Chemicals, Inc.
- Ryuichi Yamamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing an aromatic urethane from nitro compounds, hy...
- Patent number 4,134,880
- Issue date Jan 16, 1979
- Mitsui Toatsu Chemicals, Incorporated
- Katsuharu Miyata
- C07 - ORGANIC CHEMISTRY