US Patent Issued to Chugai Seiyaku on Aug. 11 for "Antibody constant region variant" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,703,738, issued on Aug. 11, was assigned to Chugai Seiyaku K.K. (Tokyo).

"Antibody constant region variant" was invented by Tomoyuki Igawa (Shizuoka, Japan), Taichi Kuramochi (Shizuoka, Japan), Atsuhiko Maeda (Shizuoka, Japan) and Hirotake Shiraiwa (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are IgG2 constant regions and human Kappa chain constant regions with altered amino acid sequences, antibodies comprising these constant regions, and pharmaceutical compositions comprising the antibodies."

The patent was filed on Nov. 19, 2021, under Application No. 17/530,542.

*For further information, including images, charts and ta...