Johoku Chemical Co., Ltd.

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for production of carboxylic acid aryl esters
- Patent number 6,495,712
- Issue date Dec 17, 2002
- Johoku Chemical Co., Ltd.
- Toshiyuki Yamauchi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Benzotriazolyl-alkylene bisphenol compounds, process for their prep...
- Patent number 5,932,142
- Issue date Aug 3, 1999
- Johoku Chemical Co., Ltd.
- Toshiyuki Yamauchi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing bis (2-hydroxyphenyl-3-benztriazole) methanes
- Patent number 5,808,086
- Issue date Sep 15, 1998
- Johoku Chemical Co., Ltd.
- Naoyuki Sugii
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of recovering palladium by electrolysis and apparatus therefor
- Patent number 5,250,166
- Issue date Oct 5, 1993
- Doryokuro Kakunenryo Kaihatsu Jigyodan
- Kenji Motojima
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR