US Trademark Classification US01 Chemicals 非金属氧化物(001-2283) Class 01 非金属氧化物 001-2283 Chinese 非金属氧化物 English Non-metallic oxides Term ID 001-2283 Class 01 Type Goods Status Active · added, not since modified (A) Effective date 2021-04-08 Version 11-2021