Patents Examined by Mark F. Hutt
  • Optical recording material
    Patent number: 6979413
    Abstract: Optical recording material which is capable of recording and reading an information signal by utilizing a change in the double refraction caused by a change in the molecular orientation of a side-chain type polymer liquid crystal which has an electrocyclic-reaction-type photochromic compound (or a residue thereof), or a side-chain polymer liquid crystal having in a polymer chain thereof a monomeric unit to which the photochromic compound is bonded.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: December 27, 2005
    Assignee: Asahi Glass Company, Limited
    Inventors: Yuriko Kaida, Masahiro Irie