Patents by Inventor Isao Kawata

Isao Kawata 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).

  • Patent number: 10208244
    Abstract: An organic compound represented by the following general formula is provided. In the above formula (1), R11 to R15 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an aralkyl group, an acyl group, or a halogen atom provided that at least one of R11, R13, and R15 represents the alkoxy group or the aryloxy group; and R11 to R15 may form a ring structure therebetween, R5 and R6 each independently represent an alkyl group, an aryl group, or an aralkyl group. In addition, R21 to R24 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an aralkyl group, an acyl group, or a halogen atom and may form a ring structure therebetween. The above groups except the acyl group may be substituted when necessary.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Yamada, Satoshi Igawa, Wataru Kubo, Yuto Ito, Isao Kawata
  • Publication number: 20180355086
    Abstract: To determine and detect 8-oxo-2?-deoxyguanosine in an aqueous sample solution with high sensitivity and specifically, provided is a polymer including a repetition structure represented by any one of the following general formulae 2 to 5, in which a group represented by any one of the following general formulae 6 to 11 is linked to the repetition structure represented by any one of the following general formulae 2 to 5 through a divalent linking group L.
    Type: Application
    Filed: May 31, 2018
    Publication date: December 13, 2018
    Inventors: Yutaka Tani, Takeshi Sekiguchi, Keigo Mizusawa, Ryuji Higashi, Masaru Sugita, Isao Kawata
  • Publication number: 20180335708
    Abstract: The present invention relates to an electrophotographic photosensitive member in which a surface layer contains a polymer of a hole transport material having a polymerizable functional group, and the hole transport material has a specific fluorene structure.
    Type: Application
    Filed: May 16, 2018
    Publication date: November 22, 2018
    Inventors: Koichi Nakata, Haruki Mori, Shinji Takagi, Koichi Suzuki, Ryuji Higashi, Isao Kawata, Hajime Muta, Yuto Ito, Masaki Nonaka
  • Publication number: 20180314171
    Abstract: An electrophotographic photosensitive member includes a support member, a charge generating layer containing a phthalocyanine pigment as a charge generating material, a charge transport layer containing a charge transporting material in this order. The charge generating layer has a thickness of less than 200 nm, and the phthalocyanine pigment includes phthalocyanine crystalline particles having a particle size distribution and satisfies a requirement that the volume average of the products of ?i and ?i is 0.31 or more.
    Type: Application
    Filed: April 24, 2018
    Publication date: November 1, 2018
    Inventors: Kaname Watariguchi, Shoma Hinata, Kazuko Araki, Tsutomu Nishida, Jumpei Kuno, Masataka Kawahara, Yuto Ito, Isao Kawata
  • Patent number: 9921499
    Abstract: An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: March 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kaname Watariguchi, Shoma Hinata, Kazuko Sakuma, Tsutomu Nishida, Jumpei Kuno, Hirofumi Kumoi, Masato Tanaka, Masataka Kawahara, Yuto Ito, Isao Kawata
  • Patent number: 9851648
    Abstract: The present invention provides an electrophotographic photosensitive member that allows positive ghost to be reduced even in repeated use. The electrophotographic photosensitive member of the present invention is an electrophotographic photosensitive member wherein an undercoat layer contains a polymerization product of a composition including a compound represented by the following formula (1).
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: December 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masashi Nishi, Kunihiko Sekido, Michiyo Sekiya, Kei Tagami, Isao Kawata, Yuto Ito, Akihito Saitoh
  • Publication number: 20170313934
    Abstract: An organic compound represented by the following general formula is provided. In the above formula (1), R11 to R15 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an aralkyl group, an acyl group, or a halogen atom provided that at least one of R11, R13, and R15 represents the alkoxy group or the aryloxy group; and R11 to R15 may form a ring structure therebetween, R5 and R6 each independently represent an alkyl group, an aryl group, or an aralkyl group. In addition, R21 to R24 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an aralkyl group, an acyl group, or a halogen atom and may form a ring structure therebetween. The above groups except the acyl group may be substituted when necessary.
    Type: Application
    Filed: April 26, 2017
    Publication date: November 2, 2017
    Inventors: Kenji Yamada, Satoshi Igawa, Wataru Kubo, Yuto Ito, Isao Kawata
  • Publication number: 20170123330
    Abstract: An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42.
    Type: Application
    Filed: October 26, 2016
    Publication date: May 4, 2017
    Inventors: Kaname Watariguchi, Shoma Hinata, Kazuko Sakuma, Tsutomu Nishida, Jumpei Kuno, Hirofumi Kumoi, Masato Tanaka, Masataka Kawahara, Yuto Ito, Isao Kawata
  • Publication number: 20160377999
    Abstract: The present invention provides an electrophotographic photosensitive member that allows positive ghost to be reduced even in repeated use. The electrophotographic photosensitive member of the present invention is an electrophotographic photosensitive member wherein an undercoat layer contains a polymerization product of a composition including a compound represented by the following formula (1).
    Type: Application
    Filed: May 31, 2016
    Publication date: December 29, 2016
    Inventors: Masashi Nishi, Kunihiko Sekido, Michiyo Sekiya, Kei Tagami, Isao Kawata, Yuto Ito, Akihito Saitoh
  • Patent number: 9085596
    Abstract: There is provided a new iridium complex including phenylpyridine as a ligand, the iridium complex having a basic skeleton in which a triazine ring is bonded to a phenyl ring.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: July 21, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Hashimoto, Chiaki Nishiura, Shigemoto Abe, Hiroya Nitta, Isao Kawata
  • Patent number: 8519613
    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 19, 2011
    Date of Patent: August 27, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Isao Kawata, Naoki Yamada, Akihito Saitoh, Hiroyuki Tomono, Kengo Kishino, Masashi Hashimoto, Satoshi Igawa, Keiji Okinaka
  • Publication number: 20120242255
    Abstract: There is provided a new iridium complex including phenylpyridine as a ligand, the iridium complex having a basic skeleton in which a triazine ring is bonded to a phenyl ring.
    Type: Application
    Filed: November 26, 2010
    Publication date: September 27, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masashi Hashimoto, Chiaki Nishiura, Shigemoto Abe, Hiroya Nitta, Isao Kawata
  • 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
  • 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
  • Publication number: 20100157131
    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 16, 2009
    Publication date: June 24, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Isao Kawata, Naoki Yamada, Akihito Saitoh, Hiroyuki Tomono, Kengo Kishino, Masashi Hashimoto, Satoshi Igawa, Keiji Okinaka
  • Patent number: 7130063
    Abstract: A test pattern formed in a scribe line area of a wafer is irradiated with a light beam to measure the width thereof; the test pattern is irradiated with an electron beam so as to measure the width thereof; an amount of change in the width of the test pattern is calculated; a dummy pattern having the same width as that of a semiconductor device of the wafer is irradiated with an electron beam to measure the width thereof; and the width of a pattern is estimated by the use of the calculated amount of width change so as to determine the shape of the pattern. Thus, a shape measuring system and method capable of determining the shape of a micropattern in a semiconductor device without changing the dimensions of the micropattern can be provided.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: October 31, 2006
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yasuhiro Mitsui, Yasutsugu Usami, Isao Kawata, Yuya Toyoshima, Tadashi Otaka, Nobuyuki Iriki
  • Patent number: 7038767
    Abstract: A light beam is emitted to a test pattern place formed in the scribe area on the wafer for height measurement, an electron beam is emitted to the test pattern place for width and contrast measurement and their correlations are stored. The three-dimensional profile of a pattern in a semiconductor device on the wafer is determined by irradiating the pattern with an electron beam to measure the width and contrast and estimating the height of the pattern by inferring from a correlation corresponding to the measured width and contrast. Thus, a three-dimensional profile measuring system and method capable of measuring the three-dimensional profile of a micropattern in a semiconductor device without cutting the wafer are provided.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: May 2, 2006
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yuya Toyoshima, Yasuhiro Mitsui, Yasutsugu Usami, Isao Kawata, Tadashi Otaka
  • Publication number: 20050182595
    Abstract: A test pattern formed in a scribe line area of a wafer is irradiated with a light beam to measure the width thereof; the test pattern is irradiated with an electron beam so as to measure the width thereof; an amount of change in the width of the test pattern is calculated; a dummy pattern having the same width as that of a semiconductor device of the wafer is irradiated with an electron beam to measure the width thereof; and the width of a pattern is estimated by the use of the calculated amount of width change so as to determine the shape of the pattern. Thus, a shape measuring system and method capable of determining the shape of a micropattern in a semiconductor device without changing the dimensions of the micropattern can be provided.
    Type: Application
    Filed: April 11, 2005
    Publication date: August 18, 2005
    Inventors: Yasuhiro Mitsui, Yasutsugu Usami, Isao Kawata, Yuya Toyoshima, Tadashi Otaka, Nobuyuki Iriki
  • Patent number: 6894790
    Abstract: A test pattern formed in a scribe line area of a wafer is irradiated with a light beam to measure the width thereof; the test pattern is irradiated with an electron beam so as to measure the width thereof; an amount of change in the width of the test pattern is calculated; a dummy pattern having the same width as that of a semiconductor device of the wafer is irradiated with an electron beam to measure the width thereof; and the width of a pattern is estimated by the use of the calculated amount of width change so as to determine the shape of the pattern. Thus, a shape measuring system and method capable of determining the shape of a micropattern in a semiconductor device without changing the dimensions of the micropattern can be provided.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: May 17, 2005
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yasuhiro Mitsui, Yasutsugu Usami, Isao Kawata, Yuya Toyoshima, Tadashi Otaka, Nobuyuki Iriki
  • Publication number: 20030090651
    Abstract: A light beam is emitted to a test pattern place formed in the scribe area on the wafer for height measurement, an electron beam is emitted to the test pattern place for width and contrast measurement and their correlations are stored. The three-dimensional profile of a pattern in a semiconductor device on the wafer is determined by irradiating the pattern with an electron beam to measure the width and contrast and estimating the height of the pattern by inferring from a correlation corresponding to the measured width and contrast. Thus, a three-dimensional profile measuring system and method capable of measuring the three-dimensional profile of a micropattern in a semiconductor device without cutting the wafer are provided.
    Type: Application
    Filed: November 7, 2002
    Publication date: May 15, 2003
    Inventors: Yuya Toyoshima, Yasuhiro Mitsui, Yasutsugu Usami, Isao Kawata, Tadashi Otaka