US Trademark Classification US01 Chemicals 混合稀土金属（001-2141） Class 01 混合稀土金属 001-2141 Chinese 混合稀土金属 English Mischmetal Spanish Metal mixto Term ID 001-2141 Class 01 Type Goods Status Active · added, not since modified (A) Effective date 2018-03-15 Version 11-2018