ALEXANDRIA, Va., July 7 -- United States Patent no. 12,674,220, issued on July 7, was assigned to POSCO (Pohang-si, South Korea).

"High-carbon steel sheet having good surface quality and manufacturing method therefor" was invented by Kyong-Su Park (Pohang-si, South Korea), Jung-Hyeung Lee (Pohang-si, South Korea) and Deuk-Jung Kim (Pohang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a high-carbon steel sheet having good surface quality and a manufacturing method therefor. The present invention provides a high-carbon pickled steel sheet having good surface quality, the steel sheet containing, in weight %, 0.4% or more and less than 1.2% of carbon (C), 0.5% or less (excluding 0%)...