Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB8622959Aexternal-prioritypatent/GB2197862B/en
Priority claimed from GB878719423Aexternal-prioritypatent/GB8719423D0/en
Priority claimed from IN823DE1987external-prioritypatent/IN184481B/en
Application filed by Exxon Chemical Patents IncfiledCriticalExxon Chemical Patents Inc
Priority to IN901DE1990priorityCriticalpatent/IN184401B/en
Publication of IN184401BpublicationCriticalpatent/IN184401B/en