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: 20120013700
    Abstract: Provided is a fused polycyclic compound represented by general formula 1: (In general formula 1, at least one of R1 to R4 is a group selected from a substituted or unsubstituted aryl group and a substituted or unsubstituted heterocyclic group, and R1 to R4 may be the same as or different from each other.
    Type: Application
    Filed: March 29, 2010
    Publication date: January 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takayuki Horiuchi, Jun Kamatani, Tetsuya Kosuge, Akihito Saitoh
  • Publication number: 20120012827
    Abstract: Provided is an organic light-emitting device that can be driven at low voltage, that produces a light output with high efficiency and high luminance, and that can emit light with high color purity. An organic light-emitting device includes an anode, a cathode, a light-emitting layer disposed between the anode and the cathode, and an organic layer disposed between the anode and the light-emitting layer. The organic layer has a fused polycyclic compound represented by general formula (1): wherein R1 to R8 are each a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted polycyclic group and are each the same or different, and wherein R9 and R10 are substituted or unsubstituted aryl groups that are the same or different.
    Type: Application
    Filed: July 13, 2011
    Publication date: January 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takayuki Horiuchi, Jun Kamatani, Akihito Saitoh, Kengo Kishino, Hiroyuki Tomono
  • Publication number: 20110315973
    Abstract: Provided is a fused polycyclic compound represented by the following general formula (1): (where at least two of X1 to X4 each represent a group selected from a substituted or unsubstituted aryl group and a substituted or unsubstituted heterocyclic group, and X1 to X4 may be identical to or different from one another, and at least one of Y1 and Y2 represents a group selected from a substituted or unsubstituted aryl group and a substituted or unsubstituted heterocyclic group, and Y1 and Y2 may be identical to or different from each other), the compound showing an emission hue with a good purity and having an optical output with high efficiency, high luminance, and a long lifetime.
    Type: Application
    Filed: April 8, 2010
    Publication date: December 29, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Naoki Yamada, Jun Kamatani, Takayuki Horiuchi, Hiroyuki Tomono, Akihito Saitoh
  • Patent number: 8072136
    Abstract: A novel mono(benzo[k]fluoranthene) compound having a molecular structure containing at least one condensed ring aromatic group which is tricyclic or more at any of 7- to 9-positions of benzo[k]fluoranthene. Also an organic light emitting device including at least a pair of electrodes formed of an anode and a cathode, and a layer formed of an organic compound, the layer being interposed between the pair of electrodes, in which the layer formed of an organic compound contains a compound represented by the following structural formula. An organic light emitting device in which the layer is a light emitting layer.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: December 6, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Igawa, Shinjiro Okada, Jun Kamatani, Naoki Yamada, Masashi Hashimoto, Keiji Okinaka, Chika Negishi, Akihito Saitoh, Takao Takiguchi
  • Patent number: 8067406
    Abstract: An alkyl ether derivative represented by the following general formula [1] or its salt: wherein R1 and R2 represent each a substituent such as hydrogen, halogeno or alkyl; R3 represents alkylamino, amino or hydroxyl; the ring A represents a 5- or 6-membered aromatic heterocycle or a benzene ring; m and n are each an integer of from 1 to 6; and p is an integer of from 1 to 3; shows an effect of protecting retinal nerve cells and, therefore, is useful as a preventive and/or a remedy for retinal nerve diseases such as glaucoma, diabetic retinopathy, retinal artery obstruction, retinal venous obstruction, macular degeneration and retinopathy of prematurity.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: November 29, 2011
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Tatsuo Kimura, Noboru Iwakami, Akihito Saitoh
  • Publication number: 20110251446
    Abstract: A novel diacenaphtho[1,2-b:1?,2?-k]chrysene derivative is provided.
    Type: Application
    Filed: December 16, 2009
    Publication date: October 13, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Masashi Hashimoto, Naoki Yamada, Akihito Saitoh
  • Publication number: 20110251394
    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: Application
    Filed: December 16, 2009
    Publication date: October 13, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Naoki Yamada, Akihito Saitoh
  • Patent number: 8034944
    Abstract: There are provided a novel benzofluoranthene compound and an organic light-emitting device which uses the benzofluoranthene compound, gives a blue emission hue with extremely good purity, and has an optical output with a high efficiency, a high luminance, and a long life. Specifically, there are provided a benzofluoranthene compound represented by the general formula shown below and an organic light-emitting device including a pair of electrodes including an anode and a cathode one of which is a transparent or translucent electrode material, and an organic compound layer disposed between the pair of electrodes and including a material for an organic light-emitting device containing the benzofluoranthene compound. In the general formula (1), one of X1, X2, X3, X4, X5, and X6 represents a substituted or unsubstituted fused heterocyclic group having four or less rings, and the others of X1, X2, X3, X4, X5, and X6 each represent a hydrogen atom.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: October 11, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Ohrui, Akihito Saitoh, Chika Negishi, Hironobu Iwawaki, Masanori Muratsubaki, Hiroyuki Tomono, Tetsuya Kosuge, Akihiro Senoo
  • Publication number: 20110240976
    Abstract: A benzopyrene compound represented by a general formula [1] below, where one of X1 and X2 represents a substituted or unsubstituted aryl group; another one of X1 and X2 represents a hydrogen atom; R represents an alkyl group; and n represents 0 or 1.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 6, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Naoki Yamada, Yosuke Nishide, Maki Okajima, Tetsuo Takahashi, Jun Kamatani, Akihito Saitoh
  • Patent number: 8026664
    Abstract: To provide a novel fluoranthene derivative and an organic light emitting device having the fluoranthene derivative.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: September 27, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Keiji Okinaka, Satoshi Igawa, Jun Kamatani, Naoki Yamada, Masashi Hashimoto, Masanori Muratsubaki, Takao Takiguchi, Akihiro Senoo, Shinjiro Okada, Minako Nakasu
  • Publication number: 20110227052
    Abstract: An organic compound represented by general formula (1) below and an organic light-emitting device including the organic compound are provided.
    Type: Application
    Filed: November 17, 2009
    Publication date: September 22, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Naoki Yamada, Akihito Saitoh
  • Patent number: 8021767
    Abstract: The present invention provides a high-performance organic light-emitting device, and a novel organic compound for use in the device. The novel compound of the present invention is a 4-arylfluorene compound having a specific structure. The organic light-emitting device of the present invention is an organic light-emitting device including: a pair of electrodes comprising an anode and a cathode; and an organic compound layer interposed between the pair of electrodes, wherein the organic compound layer contains the 4-arylfluorene compound.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: September 20, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Yamada, Akihito Saitoh, Jun Kamatani, Satoshi Igawa, Shinjiro Okada
  • Patent number: 8021766
    Abstract: To provide an organic light emitting device with high color purity, high efficiency, high luminance, and a long life, the organic light emitting device includes: a pair of electrodes having an anode and a cathode, and at least one layer containing an organic compound sandwiched between the pair of electrodes, at least one of the anode and the cathode being transparent or translucent, in which at least one layer containing an organic compound contains at least one kind of the benzo(ghi)fluoranthene derivative represented by the following General Formula (1) or (2).
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: September 20, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanori Muratsubaki, Akihito Saitoh, Satoshi Igawa, Takao Takiguchi, Shinjiro Okada
  • Publication number: 20110198582
    Abstract: An organic light-emitting device includes an organic compound layer containing an organic compound in which the 3-position of a benzo[k]fluoranthene ring is bonded to the 8-position of a fluoranthene ring, and an organic compound having a pyrene ring.
    Type: Application
    Filed: October 19, 2009
    Publication date: August 18, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takayuki Horiuchi, Takeshi Sekiguchi, Jun Kamatani, Akihito Saitoh, Naoki Yamada, Tetsuya Kosuge
  • Publication number: 20110198989
    Abstract: Provided are an organic compound expressed by General Formula (1) and an organic light-emitting element using the organic compound: wherein R1 to R4 are each hydrogen, an alkyl group or an aryl group.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 18, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yosuke Nishide, Takayuki Horiuchi, Jun Kamatani, Naoki Yamada, Akihito Saitoh
  • Patent number: 7998597
    Abstract: To provide an organic light emitting device having high efficiency and high luminance by making a contrivance to suppress the leakage of an electron or of an exciton, an organic light emitting device of the present invention includes two hole transporting layers having tertiary amine compounds different from each other in structure.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: August 16, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Keiji Okinaka, Satoshi Igawa, Jun Kamatani, Naoki Yamada, Masashi Hashimoto, Masanori Muratsubaki, Takao Takiguchi, Akihiro Senoo, Shinjiro Okada, Minako Nakasu
  • Patent number: 7977869
    Abstract: An organic luminescent device having organic-compound layers is provided which takes on luminous hues with very good purity and has optical power with high efficiency, high luminance and a long life. At least one of the organic-compound layers contains a benzo[k]fluoranthene compound represented by the following general formula (1): wherein R1 is a group selected from the group consisting of alkyl, aralkyl and a heterocyclic group which may be substituted, and R1's may be the same or different; R10 to R20 are each independently a group selected from the group consisting of hydrogen, halogen, alkyl, aralkyl, phenyl, a condensed bicyclic aromatic group and a heterocyclic group which may be substituted; and a is an integer of 0 or more to 9 or less.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: July 12, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Masanori Muratsubaki, Satoshi Igawa, Hiroki Ohrui, Chika Negishi, Masashi Hashimoto, Takao Takiguchi, Akihiro Senoo, Shinjiro Okada
  • Publication number: 20110147731
    Abstract: Provided are a condensed ring aromatic compound for an organic light-emitting device, and an organic light-emitting device having optical output with high efficiency and high luminescence and having durability. An organic light-emitting device including an anode and a cathode, and a layer made of an organic compound interposed between the anode and the cathode, wherein at least one layer of the layers made of the organic compound contains a condensed ring aromatic compound shown in the following general formula [1]: wherein R1 to R16 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, and may be the same or different.
    Type: Application
    Filed: March 2, 2011
    Publication date: June 23, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chika Negishi, Akihito Saitoh, Hiroki Ohrui, Hironobu Iwawaki, Masanori Muratsubaki
  • Publication number: 20110148292
    Abstract: An organic compound is represented by general formula (1) (where R1 to R14 each independently represent 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, or a substituted or unsubstituted heterocyclic group, and R11 or R12 represents a substituted or unsubstituted fused polycyclic aromatic group.
    Type: Application
    Filed: August 4, 2010
    Publication date: June 23, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Takayuki Horiuchi, Naoki Yamada, Akihito Saitoh
  • Publication number: 20110140595
    Abstract: There are provided a condensed ring aromatic compound and an organic light-emitting device having an optical output with high efficiency and high luminance, and durability. An organic light-emitting device including: a pair of electrodes comprising an anode and a cathode of which at least one is transparent or translucent; and an organic compound layer disposed between the pair of electrodes, wherein the organic compound layer contains the condensed ring aromatic compound represented by the following formula [1].
    Type: Application
    Filed: February 25, 2011
    Publication date: June 16, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chika Negishi, Akihito Saitoh, Hiroki Ohrui, Hironobu Iwawaki, Masanori Muratsubaki