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Priority claimed from US06/832,557external-prioritypatent/US4643801A/en
Priority claimed from US06/926,041external-prioritypatent/US4750974A/en
Application filed by Nalco Chemical CofiledCriticalNalco Chemical Co
Application grantedgrantedCritical
Publication of ATE62720T1publicationCriticalpatent/ATE62720T1/en