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Priority claimed from GB848407403Aexternal-prioritypatent/GB8407403D0/en
Priority claimed from GB848420436Aexternal-prioritypatent/GB8420436D0/en
Priority claimed from IN212/DEL/85Aexternal-prioritypatent/IN167621B/en
Application filed by Exxon Research Engineering CofiledCriticalExxon Research Engineering Co
Priority to IN1121/DEL/87ApriorityCriticalpatent/IN167619B/en
Publication of IN167619BpublicationCriticalpatent/IN167619B/en