ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,297, issued on May 27, was assigned to CHUGAI SEIYAKU K.K. (Tokyo).
"O-substituted serine derivative production method" was invented by Takenori Ishizawa (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "It was discovered that a cyclic sulfamidate can be produced by reacting an amino acid derivative with a cyclization reagent. In addition, it was discovered that an O-substituted serine derivative can be produced by reacting a cyclic sulfamidate with an alcohol."
The patent was filed on Nov. 7, 2019, under Application No. 17/291,099.
*For further information, including images, charts and tables, please visit: http://patft.uspto.gov/ne...