EU Trademark Classification EU40 Treatment of materials Services for the enrichment of uranium isotope 235 Class 40 Services for the enrichment of uranium isotope 235 66721 铀235同位素浓缩服务 Chinese 铀235同位素浓缩服务 English Services for the enrichment of uranium isotope 235 Site ref. 66721 Class 40 Included in Harmonised Database (HDB)