Patents by Inventor Mami Shimamura

Mami Shimamura 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 separating imide compounds
    Patent number: 7285684
    Abstract: A reaction mixture obtained by reacting a substrate in the presence of an imide compound having an imide unit represented by the formula (1) can be efficiently separated through crystallization and/or extraction with a specific solvent into the imide compound and a reaction product. (In the formula, X represents oxygen, hydroxyl, or acyloxy.) Furthermore, a mixture comprising the imide compound and a metal catalyst can be efficiently separated through crystallization, adsorption, and/or extraction into the imide compound and the metal catalyst.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: October 23, 2007
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Hiroyuki Miura, Hitoshi Watanabe, Akihiro Kuwana, Mami Shimamura, Naruhisa Hirai
  • Method of separating imide compound
    Publication number: 20020169331
    Abstract: A reaction product and an imide compound can be separated from a reaction mixture obtained by reacting a substrate in the presence of the imide compound having an imide unit represented by the following formula (1): 1
    Type: Application
    Filed: December 4, 2001
    Publication date: November 14, 2002
    Inventors: Hiroyuki Miura, Hitoshi Watanabe, Akihiro Kuwana, Mami Shimamura, Naruhisa Hirai