US Patent Issued to TOKUYAMA on Jan. 27 for "Production method for cement clinker and cement clinker powder" (Japanese Inventors)

ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,402, issued on Jan. 27, was assigned to TOKUYAMA Corp. (Yamaguchi, Japan).

"Production method for cement clinker and cement clinker powder" was invented by Akiyoshi Mori (Shunan, Japan) and Takashi Chabayashi (Shunan, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Portland cement clinker that includes C3A and C4AF in total from 22 to 40 mass % calculated by Bogue's formulas and has an iron modulus (I.M.) of 0.8 to 1.3 is produced. The burned raw materials are annealed at a cooling rate of 20 degree Celsius or lower at least to 1200 degree Celsius so that the lightness of the cement clinker is made high. When annealing till lower temperatures, ...