Patents by Inventor Takae Ohno

Takae Ohno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optically active amino acid derivatives and processes for the preparation of the same
    Patent number: 6706916
    Abstract: In producing optically-active amino acid benzyl esters by reacting optically-active amino acids with benzyl alcohols, hydrazines are present in the reaction system, or the compounds are reacted in the absence of oxygen, or the compounds are reacted in the absence of oxygen while hydrazines are present in the reaction system. The processes are simple and give optically-active amino acid benzyl esters of high optical purity.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: March 16, 2004
    Assignee: Toray Fine Chemicals Co., Ltd.
    Inventors: Haruyo Sato, Takae Ohno, Shiho Iwata