US Trademark Classification US01 Chemicals 硫酸钾（001-2223） Class 01 硫酸钾 001-2223 Chinese 硫酸钾 English Potassium sulfate Spanish sulfato de potasio Term ID 001-2223 Class 01 Type Goods Status Active · added, not since modified (A) Effective date 2020-03-12 Version 11-2020