Patents by Inventor Akihito Saitoh

Akihito Saitoh 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).

  • Publication number: 20150303386
    Abstract: Provided is an organic light-emitting device improved in emission efficiency and lifetime. The organic light-emitting device includes a pair of electrodes and an organic compound layer disposed between the pair of electrodes, in which: the organic compound layer includes a benzo[f]isoquinoline iridium complex of a specific structure and a hydrocarbon compound of a specific structure; and the hydrocarbon compound is a compound formed only of an SP2 carbon atom and a hydrogen atom.
    Type: Application
    Filed: December 25, 2013
    Publication date: October 22, 2015
    Inventors: Kengo Kishino, Akihito Saitoh, Jun Kamatani, Naoki Yamada, Tetsuya Kosuge, Takayuki Horiuchi, Shigemoto Abe, Yosuke Nishide, Hirokazu Miyashita
  • Patent number: 9166173
    Abstract: A novel organic compound is suitable for emitting green light. An organic light-emitting device includes the novel organic compound.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: October 20, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yosuke Nishide, Jun Kamatani, Akihito Saitoh
  • Publication number: 20150295188
    Abstract: Provided is an organic light-emitting element improved in luminous efficiency and lifetime. The organic light-emitting element includes a pair of electrodes and an organic compound layer placed between the pair of electrodes, in which the organic compound layer includes an iridium complex having a benzo[f]isoquinoline of a specific structure as a ligand and a heterocycle-containing compound of a specific structure.
    Type: Application
    Filed: December 24, 2013
    Publication date: October 15, 2015
    Inventors: Tetsuya Kosuge, Yosuke Nishide, Hirokazu Miyashita, Shigemoto Abe, Takayuki Horiuchi, Naoki Yamada, Jun Kamatani, Akihito Saitoh, Kengo Kishino
  • Patent number: 9145344
    Abstract: Provided are a novel organic compound appropriate for emission of green light and an organic light-emitting device including the organic compound. Provided is a substituted or unsubstituted indeno[1,2,3-cd]naphtho[2,3-k]fluoranthene appropriate for emission of green light. The substituents of the indeno[1,2,3-cd]naphtho[2,3-k]fluoranthene are each independently selected from a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted amino group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: September 29, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Naoki Yamada, Kengo Kishino, Akihito Saitoh
  • Publication number: 20150194609
    Abstract: Provided is a novel compound having a high lowest triplet excited level (T1 level), a narrow bandgap, and a shallow highest occupied molecular orbital (HOMO) level. A dibenzoxanthene compound is represented by formula [1] described in Claim 1. In formula [1], R1 to R7 are each independently selected from the group consisting of hydrogen, alkyl groups, aryl groups, heterocyclic groups, aryloxy groups, alkoxy groups, amino groups, silyl groups, and cyano groups.
    Type: Application
    Filed: June 24, 2013
    Publication date: July 9, 2015
    Inventors: Yosuke Nishide, Naoki Yamada, Akihito Saitoh
  • Patent number: 9073812
    Abstract: There is provided a novel organic compound represented by following general formula [I]and that has an excellent luminescent hue and that can produce high efficiency, high-intensity, and long-life light output, and an organic light-emitting device containing the novel organic compound, wherein X1 to X3 independently denote a hydrogen atom, an alkyl group, or an aryl group.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: July 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Yamada, Minako Nakasu, Jun Kamatani, Akihito Saitoh
  • Patent number: 9019328
    Abstract: The present invention provides a novel organic compound having a high quantum yield and a high color purity. Provided is an organic compound represented by Formula (1) described in Claim 1. In Formula (1), R1 to R20 are each independently selected from hydrogen atoms, halogen atoms, substituted or unsubstituted alkyl groups, substituted or unsubstituted alkoxy groups, substituted or unsubstituted amino groups, substituted or unsubstituted aryl groups, substituted or unsubstituted heterocyclic groups, substituted or unsubstituted aryloxy groups, substituted or unsubstituted thiol groups, silyl groups, and cyano groups.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: April 28, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Naoki Yamada, Akihito Saitoh
  • Patent number: 8968890
    Abstract: Provided are a novel organic compound suitable for emitting green light and an organic light-emitting device including the compound. The organic compound is that shown in claim 1. The organic compound shown in claim 1 has substituents that are each independently selected from the group consisting of hydrogen atoms, halogen atoms, optionally substituted alkyl groups, optionally substituted alkoxy groups, substituted amino groups, optionally substituted aryl groups, and optionally substituted heterocyclic groups.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Naoki Yamada, Kengo Kishino, Masanori Muratsubaki, Akihito Saitoh
  • Patent number: 8968889
    Abstract: A novel organic compound suitable for emitting green light and an organic light-emitting device including the organic compound are provided. The organic compound is represented by general formula (1). In general formula (1), R1 to R18 are each independently selected from a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted amino group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Kengo Kishino, Naoki Yamada, Akihito Saitoh
  • Patent number: 8963416
    Abstract: An organic compound is represented by general formula (1): where R1 to R18 are each independently selected from a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: February 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Naoki Yamada, Akihito Saitoh
  • Patent number: 8963813
    Abstract: An organic compound contains indacenodiperylene as the basic skeleton.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: February 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Naoki Yamada, Tetsuya Kosuge, Takayuki Horiuchi, Yosuke Nishide, Hirokazu Miyashita, Akihito Saitoh
  • Patent number: 8952367
    Abstract: Provided is an organic light emitting element having a high light emission efficiency and a low drive voltage. In the organic light emitting element including a positive electrode, a negative electrode and an organic compound layer disposed between the positive electrode and the negative electrode, the organic compound layer includes a thioxanthone compound represented by the following general formula [1].
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: February 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Masanori Seki, Takeshi Sekiguchi, Yosuke Nishide, Akihito Saitoh
  • Patent number: 8951648
    Abstract: A novel diacenaphtho[1,2-b:1?,2?-k]chrysene derivative is provided.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: February 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Masashi Hashimoto, Naoki Yamada, Akihito Saitoh
  • Patent number: 8940413
    Abstract: Provided is an acenaphtho[1,2-k]benzo[e]acephenanthrene derivative represented by general formula (1): wherein R1 to R16 are each independently selected from a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group; and at least one of R1 to R8 and R10 to R15 is selected from a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: January 27, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Takayuki Horiuchi, Naoki Yamada, Akihito Saitoh
  • Publication number: 20140374723
    Abstract: To provide a novel organic compound suitable for an organic light emitting device. This invention provides an organic compound having the skeleton represented by Formula (1).
    Type: Application
    Filed: November 26, 2012
    Publication date: December 25, 2014
    Inventors: Jun Kamatani, Shigemoto Abe, Masashi Hashimoto, Naoki Yamada, Akihito Saitoh
  • Publication number: 20140374738
    Abstract: Provided is an acenaphtho[1,2-k]benzo[e]acephenanthrene derivative represented by general formula (1): wherein R1 to R16 are each independently selected from a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group; and at least one of R1 to R8 and R10 to R15 is selected from a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group.
    Type: Application
    Filed: September 12, 2014
    Publication date: December 25, 2014
    Inventors: Jun Kamatani, Takayuki Horiuchi, Naoki Yamada, Akihito Saitoh
  • Patent number: 8916864
    Abstract: An organic light-emitting device includes an anode, a cathode, and an organic compound layer interposed between the anode and the cathode. The organic compound layer contains a heterocyclic compound having 4,10-Diazachrysene.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 23, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Horiuchi, Jun Kamatani, Akihito Saitoh
  • Patent number: 8900727
    Abstract: A condensed polycyclic compound represented by the following general formula [1], wherein, in General Formula [1], R1, R6, R7, and R12 each are independently selected from a hydrogen atom, an alkyl group, or an aryl group, the aryl group may have an alkyl group and a fluorine atom as a substituent, and R2 to R5 and R8 to R11 each are independently selected from a hydrogen atom and an alkyl group.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: December 2, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yosuke Nishide, Naoki Yamada, Akihito Saitoh
  • Patent number: 8877354
    Abstract: An organic light-emitting device includes an anode, a cathode, and an organic compound layer interposed between the anode and the cathode. The organic compound layer contains a heterocyclic compound represented by general formula [1]: (wherein R1 and R2 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group having three or less rings, or a substituted or unsubstituted heterocyclic group having three or less rings; R1 and R2 may be the same as or different from each other; R3 and R4 each independently represent a hydrogen atom, a substituted or unsubstituted aryl group having three or less rings, or a substituted or unsubstituted heterocyclic group having three or less rings; one of R3 and R4 represents a substituted or unsubstituted aryl group having three or less rings or a substituted or unsubstituted heterocyclic group having three or less rings; and R3 and R4 may be the same as or different from each other).
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Horiuchi, Jun Kamatani, Akihito Saitoh
  • Patent number: 8859112
    Abstract: An organic compound represented by the following general formula [1] is provided. In the general formula [1], R1 to R3 are each independently selected from the group consisting of a hydrogen atom, a fluorine group, an alkyl group having 1 to 4 carbon atoms, and an aryl group, the aryl group is a phenyl group, a biphenyl group, or a terphenyl group, the aryl group may further include an alkyl group having 1 to 4 carbon atoms and/or a fluorine group as a substituent, and R4 to R17 are each independently selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and a fluorine group.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: October 14, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yosuke Nishide, Taiki Watanabe, Tetsuya Kosuge, Naoki Yamada, Akihito Saitoh