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Application filed by Sagami Chem Res, Central Glass Co Ltd, Hodogaya Chemical Co Ltd, Nippon Soda Co, Nissan Chemical Ind Ltd, Tosoh CorpfiledCriticalSagami Chem Res
Priority claimed from PCT/JP1988/000815external-prioritypatent/WO1989001513A1/en
Application grantedgrantedCritical
Publication of ATE98990T1publicationCriticalpatent/ATE98990T1/en