ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,428, issued on Oct. 14, was assigned to Guangzhou Joyson Cleaning Products Co. Ltd. (Guangdong, China).
"Oral care cleaning tablet" was invented by Jianfeng Sun (Guangdong, China), Fenglei Li (Guangdong, China), Min Sun (Guangdong, China), Xiangjian Zeng (Guangdong, China), Na Lan (Guangdong, China) and Yumei Huang (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application discloses an oral care cleaning tablet, and relates to the technical field of an oral care product, wherein the oral care cleaning tablet 1. is made of the following raw materials by weight percentage: 8-25% of a film-forming agent, 15-40% of a surfac...