ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,787, issued on Jan. 27, was assigned to NIPPON STEEL Corp. (Tokyo).
"Hot rolled steel sheet" was invented by Kohei Nakada (Tokyo) and Takeshi Toyoda (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a hot rolled steel sheet having a predetermined chemical composition and a microstructure comprising, by area ratio, pearlite: 90 to 100% and pro-eutectoid ferrite: 0 to 10%, wherein the pearlite has an average lamellar spacing of 0.08 to 0.30 micro metre, and the percentage of cementite in the pearlite having a major axis length of more than 0.3 micro metre and an aspect ratio of less than 3.0 is less than 15%."
The patent was filed on ...