ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,446,734, issued on Oct. 21, was assigned to NINGBO LISI HOUSEWARE Co. LTD. (Ningbo, China).
"Box lid and airtight box" was invented by Li Lixin (Ningbo, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure provides a box lid and an airtight box and belongs to the technical field of food preservation boxes. The box lid comprises: a lid body; and a sealing ring connected to the lid body, the sealing ring comprising an inclined portion inclined inwards, wherein the inclined portion can produce elastic deformation and is deformable to a sealing state. The beneficial effects of this disclosure are as follows: The specially designed sealing ri...