US Trademark Classification US01 Chemicals 工业用三甘醇（001-2251） Class 01 工业用三甘醇 001-2251 Chinese 工业用三甘醇 English Triethylene glycol for industrial purposes Term ID 001-2251 Class 01 Type Goods Status Active · added, not since modified (A) Effective date 2021-01-21 Version 11-2021