Patents by Inventor Shirou Irisa

Shirou Irisa 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).

  • Benzotriazole derivatives and organic electroluminescent devices using the derivatives
    Patent number: 9123897
    Abstract: Benzotriazole derivatives represented by the following general formula (1), wherein Ar1 and Ar2 are, for example, aromatic hydrocarbon groups or aromatic heterocyclic ring groups, and A is a group including a pyridine ring. The compounds excel in electron injection/transport capability, feature a high hole-blocking power and a high stability in their thin-film form, and are useful as materials for producing highly efficient and highly durable organic electroluminescent devices.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: September 1, 2015
    Assignee: HODOGAYA CHEMICAL CO., LTD.
    Inventors: Norimasa Yokoyama, Shigetaka Numazawa, Shirou Irisa, Shuichi Hayashi
  • NOVEL BENZOTRIAZOLE DERIVATIVES AND ORGANIC ELECTROLUMINESCENT DEVICES USING THE DERIVATIVES
    Publication number: 20140374721
    Abstract: Benzotriazole derivatives represented by the following general formula (1), wherein Ar1 and Ar2 are, for example, aromatic hydrocarbon groups or aromatic heterocyclic ring groups, and A is a group including a pyridine ring. The compounds excel in electron injection/transport capability, feature a high hole-blocking power and a high stability in their thin-film form, and are useful as materials for producing highly efficient and highly durable organic electroluminescent devices.
    Type: Application
    Filed: October 5, 2012
    Publication date: December 25, 2014
    Applicant: HODOGAYA CHEMICAL CO., LTD
    Inventors: Norimasa Yokoyama, Shigetaka Numazawa, Shirou Irisa, Shuichi Hayashi