Patents by Inventor Toshihiro Naraya

Toshihiro Naraya 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).

  • Fluorinated bis (phthalic anhydride) and method for producing the same
    Publication number: 20080119659
    Abstract: It is an object of the present invention to provide fluorinated bis(phthalic anhydride) which has less coloration and higher solubility in comparison with conventional compounds, and a method for producing the same. Further, it is also an object of the present invention to provide a method for producing a fluorinated bis(phthalonitrile) compound, which is an intermediate raw material compound of the method for producing the fluorinated bis(phthalic anhydride), and a polyamic acid and a polyimide, which are produced from the fluorinated bis(phthalic anhydride). A fluorinated bis(phthalic anhydride) of the present invention is the fluorinated bis(phthalic anhydride) represented by the following formula (I1), wherein its specific surface area is 3.0 m2/g or larger. It is also characterized in that its molar absorption coefficient is 0.6 L/mol·cm or less at a wavelength of 360 nm. [wherein, m and n independently represent integers of 1 to 3, and Z1 represents a single bond group or a bivalent organic group.
    Type: Application
    Filed: January 7, 2008
    Publication date: May 22, 2008
    Inventors: Go Masuda, Yasunori Okumura, Shinji Nishimae, Toshihiro Naraya
  • Fluorinated bis(phthalic anhydride) and method for producing the same
    Publication number: 20050020839
    Abstract: It is an object of the present invention to provide fluorinated bis(phthalic anhydride) which has less coloration and higher solubility in comparison with conventional compounds, and a method for producing the same. Further, it is also an object of the present invention to provide a method for producing a fluorinated bis(phthalonitrile) compound, which is an intermediate raw material compound of the method for producing the fluorinated bis(phthalic anhydride), and a polyamic acid and a polyimide, which are produced from the fluorinated bis(phthalic anhydride). A fluorinated bis(phthalic anhydride) of the present invention is the fluorinated bis(phthalic anhydride) represented by the following formula (I1), wherein its specific surface area is 3.0 m2/g or larger. It is also characterized in that its molar absorption coefficient is 0.6 L/mol·cm or less at a wavelength of 360 nm. [wherein, m and n independently represent integers of 1 to 3, and Z1 represents a single bond group or a bivalent organic group.
    Type: Application
    Filed: June 17, 2004
    Publication date: January 27, 2005
    Inventors: Go Masuda, Yasunori Okumura, Shinji Nishimae, Toshihiro Naraya