[1]CurrentPatentAssignee:NIPPONSODACOMPANYLIMITED-DE2252818,1974,A1[Chem.Abstr.,1974,vol.81,#25407][Chem.Abstr.,1974,vol.81,#25407]
[2]CurrentPatentAssignee:NIPPONSODACOMPANYLIMITED-FR2204351,1974,B1[Chem.Abstr.,1975,vol.82,#150523][Chem.Abstr.,1975,vol.82,#150523]