Patents by Inventor Koich Baba

Koich Baba 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 producing pigment nanoparticle
    Patent number: 7192477
    Abstract: The process for producing highly concentrated nanometer-size fine particles of an organic pigment, which comprises dissolving the organic pigment in an amide solvent, especially an organic solvent comprising at least 50 vol % 1-methyl-2-pyrrodinone, and pouring the resultant organic pigment solution with stirring into a poor solvent which is not compatible with the organic pigment. The pigment may be a quinacridone pigment, phthalocyanine pigment etc. Any atmospheric pressure to a sub-critical and/or supercritical state can be employed as the production conditions.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: March 20, 2007
    Assignee: Japan Science and Technology Agency
    Inventors: Hachiro Nakanishi, Koich Baba, Hitoshi Kasai, Hidetoshi Oikawa, Shuji Oikawa