Methine Or Polymethine Dyes [n0505] {g11b 7/247} Patents (Class G9B/7.15)
  • Patent number: 8277920
    Abstract: An optical recording material comprising at least one kind of chalcone type compound represented by the following general formula (I) or a metal complex using the chalcone type compound as a ligand: wherein ring A represents a 5- or 6-membered heterocyclic ring or an aromatic ring; ring B represents a 5- or 6-membered heterocyclic ring, an aromatic ring, or a metallocene structure; the above-mentioned heterocyclic and aromatic ring may be condensed with other rings or may be substituted; n is 0 or 1.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: October 2, 2012
    Assignee: Adeka Corporation
    Inventors: Toru Yano, Yohei Aoyama
  • Patent number: 8197923
    Abstract: An optical recording medium having a substrate and an optical recording layer on the substrate. The optical recording layer is formed of an optical recording material containing at least one heterocyclic compound represented by general formula (I): wherein Z1 represents oxygen, sulfur, —CR5R6—, etc. (R5 and R6 are each a substituent, e.g., an alkyl group or an aralkyl group, or are taken together to form a ring); R1 and R2 each represent hydrogen, etc.; R3 and R4 each represent an alkyl group having 1 to 8 carbon atoms or are taken together to form a heterocyclic ring having no multiple bond; Y1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a metallocene substituent, etc.; Anq? represents a q-valent anion; q represents 1 or 2; p represents a number necessary to neutralize an electric charge; and n represents a number of 1 to 4.
    Type: Grant
    Filed: February 19, 2007
    Date of Patent: June 12, 2012
    Assignee: Adeka Corporation
    Inventors: Satoshi Yanagisawa, Yusuke Kubota