Patents by Inventor Yasujiro Kimura

Yasujiro Kimura 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).

  • Process for the preparation of 1, 2-dichlorethane free crystals of zonisamide
    Patent number: 6900333
    Abstract: A process for the preparation of crystals of zonisamide containing residual 1,2-dichloroethane of not more than 5 ppm, by adding an aqueous C2-4 alcohol to crystals of zonisamide containing residual 1,2-dichloroethane of more than 5 ppm, removing the 1,2-dichloroethane by azeotropic distillation, followed by collecting the precipitated crystals from the residual mixture.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: May 31, 2005
    Assignee: Dainippon Pharmaceutical Co., Ltd.
    Inventors: Yoshikazu Ueno, Yasujiro Kimura
  • Process for the preparation of 1,2-dichloroethane free crystals of zonisamide
    Publication number: 20050080269
    Abstract: A process for the preparation of crystals of zonisamide containing residual 1,2-dichloroethane of not more than 5 ppm, by adding an aqueous C2-4 alcohol to crystals of zonisamide containing residual 1,2-dichloroethane of more than 5 ppm, removing the 1,2-dichloroethane by azeotropic distillation, followed by collecting the precipitated crystals from the residual mixture.
    Type: Application
    Filed: August 8, 2003
    Publication date: April 14, 2005
    Inventors: Yoshikazu Ueno, Yasujiro Kimura
  • Process for the preparation of 1, 2-dichloroethane free crystals of zonisamide
    Publication number: 20040138473
    Abstract: A process for the preparation of crystals of zonisamide containing residual 1,2-dichloroethane of not more than 5 ppm, which comprises adding an aqueous C2-4 alcohol to crystals of zonisamide containing residual 1,2-dichloroethane of more than 5 ppm, removing said 1,2-dichloroethane by azeotropic distillation, followed by collecting the precipitated crystals from the residual mixture.
    Type: Application
    Filed: December 12, 2003
    Publication date: July 15, 2004
    Inventors: Yoshikazu Ueno, Yasujiro Kimura
  • Process for the preparation of 1,2-dichloroethane free crystals of zonisamide
    Publication number: 20040138474
    Abstract: A process for the preparation of crystals of zonisamide containing residual 1,2-dichloroethane of not more than 5 ppm, which comprises adding an aqueous C2-4 alcohol to crystals of zonisamide containing residual 1,2-dichloroethane of more than 5 ppm, removing said 1,2-dichloroethane by azeotropic distillation, followed by collecting the precipitated crystals from the residual mixture.
    Type: Application
    Filed: December 12, 2003
    Publication date: July 15, 2004
    Inventors: Yoshikazu Ueno, Yasujiro Kimura