Patents by Inventor Osahiko Tanaka

Osahiko Tanaka 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).

  • Novel Oxonol Dye Compounds and Optical Information Recording Medium
    Publication number: 20080090174
    Abstract: An optical recording medium comprising a substrate having thereon a recording layer containing at least two kinds of dye A and dye B, wherein dye A and dye B satisfy the following conditions (1) and (2): (1) the starting temperature of decomposition is from 150 to 250° C., (2) refractive index n(A) and extinction coefficient k(A) of dye A at the wavelength of recording laser ray, and refractive index n(B) and extinction coefficient k(B) of dye B at the same wavelength satisfy the following expressions: n(B)/n(A)>0.7 k(B)/k(A)>10.
    Type: Application
    Filed: June 22, 2005
    Publication date: April 17, 2008
    Inventors: Hisashi Mikoshiba, Masuji Motoki, Michihiro Shibata, Kazumi Nii, Osahiko Tanaka, Masaaki Tsukase