Patents by Inventor Yoshiko Kurima

Yoshiko Kurima 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).

  • Optical resolution process for DL-cysteine
    Patent number: 4613688
    Abstract: A process for the optical resolution of DL-cysteine which comprises(1) converting DL-cysteine into a hydrochloride thereof and forming a saturated or supersaturated aqueous solution thereof,(2) inoculating the solution with crystals of one optically active form of cysteine hydrochloride as seed crystals, and(3) preferentially crystallizing optically the same form of the cysteine hydrochloride used as the seed crystals, in a state of a monohydrate thereof.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: September 23, 1986
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Chozo Inoue, Yoshiko Kurima, Soyao Moriguchi