ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,746, issued on March 25.
"Method of producing container product" was invented by Chih-Chen Wang (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of producing a container product comprises providing a mold including a first part and a second part. The mold is closed to define a cavity having a first area and a second area. A molten plastic composition including a polymer and a physical blowing agent is filled into the cavity. Then, the molten plastic composition in the cavity is cooled, such that the molten plastic composition in the first area is completely cooled and solidifies or a central portion of the first area has micr...