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 GB7922511Aexternal-prioritypatent/GB2027013B/en
Priority claimed from SU802949055Aexternal-prioritypatent/SU1324575A3/en
Application filed by Ici PlcfiledCriticalIci Plc
Publication of LV5161A3publicationCriticalpatent/LV5161A3/en