Patents by Inventor Toru Akisada

Toru Akisada 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).

  • Compound having thiadiazole ring structure substituted with pyridyl group and organic electroluminescent device
    Patent number: 8153277
    Abstract: An object of the present invention is to provide an organic compound having excellent characteristics, which is excellent in electron injection/transport performance, has hole blocking property and is high in stability in a thin film state, as a material for an organic EL device having high efficiency and high durability, and further to provide an organic EL device having high efficiency and high durability using this compound. The invention relates to a compound represented by general formula (1), which has a thiadiazole ring structure substituted with a substituted pyridyl group, and to an organic EL device having a pair of electrodes and at least one organic layer interposed therebetween, wherein the compound is contained as a constituent material of at least one of the organic layer(s).
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: April 10, 2012
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Norimasa Yokoyama, Toru Akisada, Shigeru Kusano
  • COMPOUND HAVING TRIAZINE RING STRUCTURE SUBSTITUTED WITH PYRIDYL GROUP AND ORGANIC ELECTROLUMINESCENT DEVICE
    Publication number: 20100090588
    Abstract: The present invention is to provide an organic compound having excellent characteristics as a material for an organic EL device having a high efficiency and a high durability, and to provide an organic EL device having a high efficiency and a high durability using the compound.
    Type: Application
    Filed: August 16, 2007
    Publication date: April 15, 2010
    Applicants: Hodogaya Chemical Co., Ltd., Shinshu Univ., Nat. Univ Corp
    Inventors: Norimasa Yokoyama, Toru Akisada, Makoto Nagaoka, Yoshio Taniguchi, Musubu Ichikawa
  • COMPOUND HAVING THIADIAZOLE RING STRUCTURE SUBSTITUTED WITH PYRIDYL GROUP AND ORGANIC ELECTROLUMINESCENT DEVICE
    Publication number: 20090108750
    Abstract: An object of the present invention is to provide an organic compound having excellent characteristics, which is excellent in electron injection/transport performance, has hole blocking property and is high in stability in a thin film state, as a material for an organic EL device having high efficiency and high durability, and further to provide an organic EL device having high efficiency and high durability using this compound. The invention relates to a compound represented by general formula (1), which has a thiadiazole ring structure substituted with a substituted pyridyl group, and to an organic EL device having a pair of electrodes and at least one organic layer interposed therebetween, wherein the compound is contained as a constituent material of at least one of the organic layer(s).
    Type: Application
    Filed: March 20, 2007
    Publication date: April 30, 2009
    Applicant: Hodogaya Chemical Co., Ltd.
    Inventors: Norimasa Yokoyama, Toru Akisada, Shigeru Kusano