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Fukuji Higashi
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Tokyo, JP
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last 30 patents
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Patent Grant
Phosphonium salt and its use
Patent number
4,173,563
Issue date
Nov 6, 1979
Sumitomo Chemical Company, Limited
Noboru Yamazaki
C07 - ORGANIC CHEMISTRY
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Patent Grant
Esterification of carboxylic acids by contact with a phosphonium salt
Patent number
4,120,853
Issue date
Oct 17, 1978
Sumitomo Chemical Company, Limited
Noboru Yamazaki
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Production of aromatic polyamides from dicarboxylic acid and diamine
Patent number
4,118,374
Issue date
Oct 3, 1978
Sumitomo Chemical Company, Limited
Noboru Yamazaki
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...