GENEVA, April 29 -- NIPPON STEEL CORPORATION (6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo1008071), 日本製鉄株式会社 (東京都千代田区丸の内二丁目6番1号), KROSAKI HARIMA CORPORATION (1-1 Higashihama-machi, Yahatanishi-ku, Kitakyushu-shi, Fukuoka8068586), 黒崎播磨株式会社 (福岡県北九州市八幡西区東浜町1番1号) filed a patent application (PCT/JP2024/037221) for "SILICON NITRIDE-BASED SINTERED BODY AND METHOD FOR PRODUCING SAME" on Oct 18, 2024....