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: 20130002526
    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: Application
    Filed: March 22, 2011
    Publication date: January 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Kengo Kishino, Naoki Yamada, Akihito Saitoh
  • Publication number: 20130001543
    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: Application
    Filed: June 7, 2011
    Publication date: January 3, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Naoki Yamada, Kengo Kishino, Masanori Muratsubaki, Akihito Saitoh
  • Publication number: 20120299806
    Abstract: Provided are a novel organic compound appropriate for emission of blue light and an organic light-emitting device including the organic compound. The organic compound is represented by general formula 1: wherein R1 to R6 are each independently selected from a hydrogen atom, an alkyl group, and an aryl group. The alkyl group and the aryl group are optionally substituted.
    Type: Application
    Filed: January 12, 2011
    Publication date: November 29, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yosuke Nishide, Hirokazu Miyashita, Jun Kamatani, Akihito Saitoh
  • Patent number: 8318395
    Abstract: Provided is a novel dibenzo[a,c]anthracene compound having substituents, which can be used in an organic light emitting device.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: November 27, 2012
    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: 8293384
    Abstract: An organic compound is an acenaphtho[1,2-k]benzo[e]acephenanthrene derivative represented by general formula (1): where R1 and R2 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: April 20, 2010
    Date of Patent: October 23, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Takayuki Horiuchi, Naoki Yamada, Akihito Saitoh
  • Patent number: 8283053
    Abstract: To provide a high-performance organic light emitting device and a novel compound possessed by the device. Provided are a novel fluoranthene derivative and an organic light emitting compound having the derivative.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: October 9, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Hashimoto, Akihito Saitoh, Naoki Yamada, Satoshi Igawa, Jun Kamatani, Takao Takiguchi, Shinjiro Okada
  • Patent number: 8273902
    Abstract: A Process for production of 1-(3-(2-(1-benzothiophen-5-yl)ethoxy)propyl)azetidin-3-ol or salts thereof which comprises using as a starting compound as a (phenylthio)acetic acid derivative or salts thereof represented by the general formula: wherein X1 represents a halogen atom, is useful as a safe process for mass production of 1-(3-(2-(1-benzothiophen-5-yl)ethoxy)propyl)azetidin-3-ol or salts thereof which is useful as a remedy for disease of central and peripheral nerve.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: September 25, 2012
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Akihito Saitoh, Yoshiaki Suzuki, Kenji Yonezawa, Mitsuhide Kawamura, Takahiko Kusanagi, Takashi Nakai
  • Patent number: 8227094
    Abstract: Provided is an organic electroluminescent device for emitting blue light, which has high luminous efficiency and good drive durability. This organic electroluminescent device for emitting blue light includes an anode 2, a cathode 6, and a layer which contains an organic compound interposed between the anode 2 and the cathode 6, the layer which contains an organic compound including at least a light-emitting layer 4, wherein the light-emitting layer 4 contains a bipolar host having a hole mobility and an electron mobility of 10?4 cm2/Vs or greater, a light-emitting dopant and a carrier trapping dopant, and the light-emitting dopant energy gap EgB, the bipolar host energy gap Egh, and the carrier trapping dopant energy gap Egd are such that Egd>Egh>EgB.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: July 24, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Okinaka, Masataka Yashima, Akihito Saitoh, Naoki Yamada
  • Publication number: 20120153270
    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: Application
    Filed: August 5, 2010
    Publication date: June 21, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takayuki Horiuchi, Jun Kamatani, Akihito Saitoh
  • Publication number: 20120153269
    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: Application
    Filed: August 4, 2010
    Publication date: June 21, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takayuki Horiuchi, Jun Kamatani, Akihito Saitoh
  • Publication number: 20120132901
    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 pyrene derivative.
    Type: Application
    Filed: July 23, 2010
    Publication date: May 31, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Naoki Yamada, Jun Kamatani, Maki Okajima, Ryota Ooishi, Akihito Saitoh
  • Patent number: 8173275
    Abstract: The invention provides an azaindenochrysene derivative, and an organic light-emitting device outputting light having high luminance and a long lifetime with high efficiency having an organic compound layer that includes the azaindenochrysene derivative.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: May 8, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Ohrui, Masanori Muratsubaki, Takeshi Sekiguchi, Akihito Saitoh
  • Publication number: 20120091450
    Abstract: The present invention provides organic compounds which are indenobenzo[k]fluoranthene derivatives represented by the following general formula (1): In general formula (1), R1 to R14 are each independently selected from a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an amino group, an aryl group, and a heterocyclic group.
    Type: Application
    Filed: April 27, 2010
    Publication date: April 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Naoki Yamada, Akihito Saitoh
  • Publication number: 20120085996
    Abstract: An organic light-emitting device includes a first electrode, a second electrode, and a light-emitting layer disposed between the first and second electrodes. The light-emitting layer contains an organic compound emitting photoluminescent light with a peak wavelength of 430 to 480 nm. The organic compound has a profile factor of 0.02 or less at a wave number of 1,300 to 1,680 cm?1 as calculated from Huang-Rhys factors.
    Type: Application
    Filed: December 19, 2011
    Publication date: April 12, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Isao Kawata, Naoki Yamada, Akihito Saitoh, Hiroyuki Tomono, Kengo Kishino, Masashi Hashimoto, Satoshi Igawa, Keiji Okinaka
  • Publication number: 20120075171
    Abstract: An aspect of the present invention provides the dibenzothiophene compound expressed by General Formula 1 in Claim 1. In General Formula 1, R1 is either a hydrogen atom or an unsubstituted phenyl group, and Ar1 is any of phenanthrenyl, fluorenyl, triphenylenyl, naphthyl, chrysenyl, and pyrenyl groups. The options for the Ar1 substituents, namely the phenanthrenyl, fluorenyl, triphenylenyl, naphthyl, chrysenyl, and pyrenyl groups, may contain at least one of an alkyl group having one to four carbon atoms and an aryl group as a substituent.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 29, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masashi Hashimoto, Jun Kamatani, Kenichi Ikari, Akihito Saitoh
  • Patent number: 8129535
    Abstract: An alkyl ether derivative represented by the general formula: wherein each of R1 and R2 represents one or more groups selected from a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an aralkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an alkenyl group, an alkenyloxy group, an amino group, an alkylsulfonyl group, an arylsulfonyl group, a carbamoyl group, a heterocyclic group, a hydroxyl group, a carboxyl group, a nitro group, an oxo group and the like; R3 is an alkylamino group, an amino group, a hydroxyl group or the like; the ring A is a 5-membered or 6-membered heteroaromatic ring or a benzene ring; each of m and n is an integer of 1 to 6; and p is an integer of 1 to 3, or its salt has activity to protect neurons, activity to accelerate nerve regeneration and activity to accelerate neurite extension and hence is useful as a therapeutic agent for diseases in central and peripheral nerves.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: March 6, 2012
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Akihito Saitoh, Noboru Iwakami, Tamotsu Takamatsu
  • Publication number: 20120043535
    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: Application
    Filed: November 3, 2011
    Publication date: February 23, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Igawa, Shinjiro Okada, Jun Kamatani, Naoki Yamada, Masashi Hashimoto, Keiji Okinaka, Chika Negishi, Akihito Saitoh, Takao Takiguchi
  • Publication number: 20120025183
    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: April 22, 2010
    Publication date: February 2, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Takayuki Horiuchi, Naoki Yamada, Akihito Saitoh
  • Patent number: 8102116
    Abstract: An organic light-emitting device includes a first electrode, a second electrode, and a light-emitting layer disposed between the first and second electrodes. The light-emitting layer contains an organic compound emitting photoluminescent light with a peak wavelength of 430 to 480 nm. The organic compound has a profile factor of 0.02 or less at a wave number of 1,300 to 1,680 cm?1 as calculated from Huang-Rhys factors.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: January 24, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Isao Kawata, Naoki Yamada, Akihito Saitoh, Hiroyuki Tomono, Kengo Kishino, Masashi Hashimoto, Satoshi Igawa, Keiji Okinaka
  • Patent number: RE43676
    Abstract: An alkyl ether represented by the general formula: or its salt. This compound has activity to protect neurons, activity to accelerate nerve regeneration and activity to accelerate neurite extension and hence is useful as a therapeutic agent for diseases in central and peripheral nerves.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: September 18, 2012
    Assignee: Toyama Chemical Co., Ltd.
    Inventors: Akihito Saitoh, Noboru Iwakami, Tamotsu Takamatsu