Yoshiro Ashina

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Patents Grantslast 30 patents

Information Patent Grant
Method for maintaining the activity of zeolite catalysts
- Patent number 5,068,442
- Issue date Nov 26, 1991
- Nitto Kagaku Kogyo Kabushiki Kaisha
- Yoshiro Ashina
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for producing dimethylamine in preference to mono- and trim...
- Patent number 4,582,936
- Issue date Apr 15, 1986
- Nitto Kagaku Kogyo Kabushiki Kaisha
- Yoshiro Ashina
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process for producing dimethylamine in preference to mono- or trime...
- Patent number 4,578,516
- Issue date Mar 25, 1986
- Nitto Kagaku Kogyu Kabushiki Kaisha
- Yoshiro Ashina
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process for producing methylamines
- Patent number 4,485,261
- Issue date Nov 27, 1984
- Nitto Kagaku Kogyo Kabushiki Kaisha
- Yoshiro Ashina
- C07 - ORGANIC CHEMISTRY