Patents by Inventor Nobuhiro Watanabe

Nobuhiro Watanabe 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: 11020418
    Abstract: A unit structure-type pharmaceutical composition includes a single nucleic acid, such as an antisense nucleic acid, electrostatically bound to a single block copolymer having a cationic polyamino acid segment and a hydrophilic polymer chain segment. The negative charges of the nucleic acid are counterbalanced, at least substantially, by the positive charges of the cationic polyamino acid segment such that the pharmaceutical composition is electrically neutral or nearly electrically neutral. Further, the nucleic acid is covered with the hydrophilic polymer chain segment. The block copolymer thereby improves the blood retention capability of the nucleic acids.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: June 1, 2021
    Assignees: NANOCARRIER CO., LTD., THE UNIVERSITY OF TOKYO
    Inventors: Kazunori Kataoka, Kanjiro Miyata, Nobuhiro Nishiyama, Kensuke Osada, Sumiyo Watanabe, Shigeto Fukushima, Hiroyuki Chaya, Hiroyasu Takemoto, Yasuki Kato
  • Patent number: 11003102
    Abstract: Provided are an electrophotographic apparatus and a process cartridge each capable of suppressing the occurrence of a black spot (white background contamination) in an output image under a low-temperature and low-humidity environment. The electrophotographic apparatus includes: an electrophotographic photosensitive member including a support, a photosensitive layer, and a protective layer in the stated order; an exposing device; a developing device; and a cleaning device, wherein the protective layer has a triarylamine structure and a specific structure at a ratio in a specific range, and a toner contains toner particles each containing at least a resin, and an external additive. The toner has a volume-average particle diameter of 7 ?m or more. The external additive contains a compound containing a titanium atom. The ratio of the mass of the compound containing a titanium atom to the total mass of the toner is 0.6 mass % or more.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: May 11, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuka Ishiduka, Tsutomu Nishida, Hideharu Shimozawa, Nobuhiro Nakamura, Hiroyuki Watanabe
  • Publication number: 20210116833
    Abstract: There is provided a process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge including an electrophotographic photosensitive member and a charging member, wherein an outer surface of the charging member is composed of at least a matrix and at least a part of domains, a volume resistivity of the matrix is 1.0×105 times or more of a volume resistivity of the domain, an average value Sd of circle equivalent diameters of the domains observed on the outer surface of the charging member is in a predetermined range, the electrophotographic photosensitive member contains a support, a photosensitive layer, and a protective layer in this order and when a surface roughness of the protective layer is measured, each of a protruding valley portion Rvk, a load length ratio Mr2, and Sd/Rvk is in a predetermined range.
    Type: Application
    Filed: October 14, 2020
    Publication date: April 22, 2021
    Inventors: Yuka Ishiduka, Tsutomu Nishida, Hideharu Shimozawa, Nobuhiro Nakamura, Hiroyuki Watanabe, Kenichi Kaku, Kazuhiro Yamauchi, Yuichi Kikuchi, Kazuhisa Shida, Atsushi Okuda
  • Publication number: 20210116826
    Abstract: A process cartridge which allows any spot and stripe as image defects to be suppressed is provided. A process cartridge, in which an electroconductive layer of a charging member has a matrix including a first rubber, and domains dispersed in the matrix, the domains include a second rubber and an electron electroconductive agent, at least some of the domains are exposed on a surface of the charging member, when a volume resistivity of the matrix is 105 times or more a volume resistivity of the domains, a protective layer of an electrophotographic photosensitive member includes a metal oxide particle, and when a number average primary particle size of the metal oxide particle is defined as Sm and an average value of equivalent circle diameters of the domains is defined as Sd, the Sd/Sm satisfies the following expression (1): 0.5<Sd/Sm<100 . . . expression (1).
    Type: Application
    Filed: October 14, 2020
    Publication date: April 22, 2021
    Inventors: Tsutomu Nishida, Yuka Ishiduka, Kenichi Kaku, Nobuhiro Nakamura, Hiroyuki Watanabe, Hideharu Shimozawa, Atsushi Okuda, Yuichi Kikuchi, Kazuhiro Yamauchi
  • Patent number: 10975194
    Abstract: Provided is a polycarbonate resin, including, as a raw material, a bisphenol A having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane, each detected after heating in air at 175° C. for 1 hour.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: April 13, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventor: Nobuhiro Watanabe
  • Patent number: 10464235
    Abstract: An extrusion pelletizer for a polycarbonate resin includes: an extruder; a cooling unit; and a cutter. The extruder includes a cylinder top, a first adapter, a polymer filter unit, a second adapter, and a die head. The polymer filter unit includes a plurality of stick-shaped filter elements therein. A temperature of the second adapter is set to be lower than a temperature of the polymer filter unit. The cooling unit and the cutter are disposed under an atmosphere in which air cleanliness defined in accordance with JIS B 9920 is any one of class 1 to class 7.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: November 5, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Nobuhiro Watanabe, Takayoshi Tanaka
  • Publication number: 20190233584
    Abstract: Provided is a polycarbonate resin, including, as a raw material, a bisphenol A having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane, each detected after heating in air at 175° C. for 1 hour.
    Type: Application
    Filed: April 5, 2019
    Publication date: August 1, 2019
    Applicant: IDEMITSU KOSAN CO., LTD
    Inventor: Nobuhiro WATANABE
  • Publication number: 20180371235
    Abstract: Provided are a polycarbonate resin composition (1) containing, with respect to 100 parts by mass of (A) a polycarbonate resin, 0.01 part by mass to 0.25 part by mass of (B) a silicone compound, and 0.015 part by mass to 0.25 part by mass of (C) an ester of an aliphatic carboxylic acid having 12 to 22 carbon atoms and glycerin, wherein a sodium content in the component (B) is 15 ppm by mass or less, or a polycarbonate resin composition (2) containing, with respect to 100 parts by mass of the component (A), 0.01 part by mass to 0.25 part by mass of the component (B), and 0.015 part by mass to 0.25 part by mass of the component (C), wherein the modification ratio of the component (C) is 30% or less, and a molded article obtained from the polycarbonate resin composition (1) or (2).
    Type: Application
    Filed: November 8, 2016
    Publication date: December 27, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventor: Nobuhiro WATANABE
  • Publication number: 20180355166
    Abstract: Provided is a method of producing a polycarbonate resin pellet containing a polycarbonate resin serving as a component (A), a silicone compound serving as a component (B), and an ester of an aliphatic carboxylic acid having 12 to 22 carbon atoms and glycerin serving as a component (C), the production method including a step including introducing a blend containing the component (A), the component (B), and the component (C) into an extruder, and melt-kneading the blend in the extruder under such a condition that a temperature of a molten resin at an outlet of the extruder is 260° C. or more and 325° C. or less, followed by extrusion molding to provide a polycarbonate resin pellet, the resultant polycarbonate resin pellet containing 0.01 part by mass or more and 0.25 part by mass or less of the component (B), and 0.015 part by mass or more and 0.25 part by mass or less of the component (C) with respect to 100 parts by mass of the component (A).
    Type: Application
    Filed: November 8, 2016
    Publication date: December 13, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventor: Nobuhiro WATANABE
  • Patent number: 10072134
    Abstract: Provided is a polycarbonate-based resin composition, including: (A) a polycarbonate-based resin including 10 mass % to 100 mass % of a specific polycarbonate-polyorganosiloxane copolymer (A-1) and 0 mass % to 90 mass % of a polycarbonate (A-2) except the copolymer (A-1); and (B) an additive, the polycarbonate-based resin composition containing sodium at a content of 0.5 ppm or less.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: September 11, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventor: Nobuhiro Watanabe
  • Publication number: 20170015782
    Abstract: Provided is a polycarbonate resin, including, as a dihydric phenol serving as a raw material, a bisphenol A having an isopropenylphenol concentration of 150 ppm by mass or less within 1 hour after granulation and under an ambient temperature condition of from 10° C. to 50° C.
    Type: Application
    Filed: February 23, 2015
    Publication date: January 19, 2017
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventor: Nobuhiro WATANABE
  • Publication number: 20170009012
    Abstract: Provided is a polycarbonate resin, including, as a raw material, a bisphenol A having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane, each detected after heating in air at 175° C. for 1 hour.
    Type: Application
    Filed: February 23, 2015
    Publication date: January 12, 2017
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventor: Nobuhiro WATANABE
  • Patent number: 9408321
    Abstract: A guide groove has two protrusions on a side face, and a slider has three concave grooves, into which the two protrusions are capable of being fitted, on a sidewall. When the slider is located at a lock position, the two protrusions are fitted into two of the three concave grooves on one end side of the guide groove to restrict movement of the slider. When the slider is located at an unlock position, the two protrusions are fitted into two of the three concave grooves on the other end side of the guide groove to restrict movement of the slider.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: August 2, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hirokazu Nomoto, Nobuhiro Watanabe, Yusuke Kurose
  • Patent number: 9331282
    Abstract: The objective of the present invention is to provide a photovoltaic device which has high photoelectric conversion efficiency and an electron-donating organic material which comprises a conjugate polymer having a structure of a thieno[3,4-b?]thiophene skeleton with an alkoxycarbonyl group in which a specific alkyl group part is a straight chain alkyl group or an alkanoyl group in which the alkyl group part is a straight chain alkyl group and a benzo[1,2-b:4, 5-b?]dithiophene skeleton with a heteroaryl group.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: May 3, 2016
    Assignee: Toray Industries, Inc.
    Inventors: Nobuhiro Watanabe, Daisuke Kitazawa, Shuhei Yamamoto, Satoru Shimomura
  • Publication number: 20160060428
    Abstract: Provided is a polycarbonate-based resin composition, including: (A) a polycarbonate-based resin including 10 mass % to 100 mass % of a specific polycarbonate-polyorganosiloxane copolymer (A-1) and 0 mass % to 90 mass % of a polycarbonate (A-2) except the copolymer (A-1); and (B) an additive, the polycarbonate-based resin composition containing sodium at a content of 0.5 ppm or less.
    Type: Application
    Filed: April 18, 2014
    Publication date: March 3, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventor: Nobuhiro WATANABE
  • Publication number: 20160029505
    Abstract: A guide groove (31) has two protrusions (4) on a side face (311), and a slider (32) has three concave grooves (5), into which the two protrusions (4) are capable of being fitted, on a sidewall (324). When the slider (32) is located at a lock position, the two protrusions (4) are fitted into two of the three concave grooves (5) on one end side of the guide groove (31) to restrict movement of the slider (32). When the slider (32) is located at an unlock position, the two protrusions (4) are fitted into two of the three concave grooves (5) on the other end side of the guide groove (31) to restrict movement of the slider (32).
    Type: Application
    Filed: March 7, 2013
    Publication date: January 28, 2016
    Inventors: Hirokazu NOMOTO, Nobuhiro WATANABE, Yusuke KUROSE
  • Publication number: 20150360393
    Abstract: An extrusion pelletizer for a polycarbonate resin includes: an extruder; a cooling unit; and a cutter. The extruder includes a cylinder top, a first adapter, a polymer filter unit, a second adapter, and a die head. The polymer filter unit includes a plurality of stick-shaped filter elements therein. A temperature of the second adapter is set to be lower than a temperature of the polymer filter unit. The cooling unit and the cutter are disposed under an atmosphere in which air cleanliness defined in accordance with JIS B9920 is any one of class 1 to class 7.
    Type: Application
    Filed: December 25, 2013
    Publication date: December 17, 2015
    Applicant: IDEMITSU KOSAN., LTD.
    Inventors: Nobuhiro WATANABE, Takayoshi TANAKA
  • Publication number: 20150249214
    Abstract: A photovoltaic device has high photoelectric conversion efficiency and an electron-donating organic material including a conjugate polymer having a structure of a thieno[3,4-b]thiophene skeleton with an alkoxycarbonyl group in which a specific alkyl group part is a straight chain alkyl group or an alkanoyl group in which the alkyl group part is a straight chain alkyl group and a benzo[1,2-b:4, 5-b?]dithiophene skeleton with a heteroaryl group.
    Type: Application
    Filed: September 6, 2013
    Publication date: September 3, 2015
    Applicant: Toray Industries, Inc.
    Inventors: Nobuhiro Watanabe, Daisuke Kitazawa, Shuhei Yamamoto, Satoru Shimomura
  • Patent number: 8501901
    Abstract: A photovoltaic device has a high photoelectric conversion efficiency with a material for a photovoltaic device including an electron donating organic material having a structure represented by Formula (1):
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: August 6, 2013
    Assignee: Toray Industries, Inc.
    Inventors: Daisuke Kitazawa, Shuhei Yamamoto, Nobuhiro Watanabe, Jun Tsukamoto
  • Publication number: 20110272030
    Abstract: A photovoltaic device has a high photoelectric conversion efficiency with a material for a photovoltaic device including an electron donating organic material having a structure represented by Formula (1):
    Type: Application
    Filed: January 20, 2010
    Publication date: November 10, 2011
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Daisuke Kitazawa, Shuhei Yamamoto, Nobuhiro Watanabe, Jun Tsukamoto