ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,374, issued on June 17, was assigned to JFE Steel Corp. (Tokyo).
"Thin steel sheet and method for manufacturing same" was invented by Noriaki Kohsaka (Tokyo), Shinjiro Kaneko (Tokyo), Akinori Nakamura (Tokyo), Yuma Honda (Tokyo), Tadachika Chiba (Tokyo) and Yoshihiko Ono (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A thin steel sheet has a specific chemical composition. The thin steel sheet has a microstructure in which ferrite is present in an area fraction of 5% or more and 60% or less, as-quenched martensite is present in an area fraction of 10% or less (including 0%), retained austenite is present in an area fraction of 5% or more and 2...