Patents by Inventor Masaki Oikawa

Masaki Oikawa 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: 20200316941
    Abstract: A liquid discharge head includes a flow passage forming member, an element substrate including a liquid discharge element and a surface on which a conductive member made from a metallic material is disposed, and an intermediate layer made from a resin material and configured to join the flow passage forming member and the surface of the element substrate to each other. The intermediate layer is disposed in a state, separated from the conductive member, where the conductive member is exposed from the intermediate layer. The conductive member is covered with the flow passage forming member.
    Type: Application
    Filed: March 24, 2020
    Publication date: October 8, 2020
    Inventors: Tomohiro Sato, Koichi Ishida, Masaki Oikawa, Yoshinori Misumi, Maki Kato, Yuzuru Ishida, Tsubasa Funabashi
  • Publication number: 20200249571
    Abstract: A resist composition comprising a sulfonium salt having formula (1) as PAG, a base polymer, and an organic solvent, when processed by lithography, has light transmittance, acid diffusion suppressing effect, and excellent lithography performance factors such as DOF, LWR and MEF. A lithography process for forming a resist pattern from the composition is also provided.
    Type: Application
    Filed: January 15, 2020
    Publication date: August 6, 2020
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Takayuki Fujiwara, Kenichi Oikawa, Masaki Ohashi, Tomohiro Kobayashi
  • Publication number: 20200180308
    Abstract: A printing apparatus measures a temperature of an electrothermal transducer by a corresponding temperature detection element, detects, based on the measured temperature, a peak voltage which indicates a point of change, from a state where ink is discharged normally from a printhead to a state where the ink is not discharged from the printhead, and compares the peak voltage with a threshold value. The measurement, detection, and comparison are repeated until the peal voltage becomes equal to or more than the threshold value. Energy supplied to the electrothermal transducer at a time in which the peak voltage is determined to be equal to or more than the threshold is determined to be minimum discharge energy.
    Type: Application
    Filed: December 3, 2019
    Publication date: June 11, 2020
    Inventors: Takatsugu Moriya, Masaki Oikawa, Nobuyuki Hirayama, Hiroyasu Nomura
  • Publication number: 20200102284
    Abstract: A medicinal agent for the prevention and/or treatment of diseases caused by EP4 receptor activation is disclosed. A compound having antagonistic activity against the EP4 receptor is contained as an active ingredient in the medicinal agent. The compound represented by the following general formula (I) as defined in the specification, a salt, an N-oxide, or a solvate thereof, or a prodrug of these is useful as a medicinal component having antagonistic activity against the EP4 receptor for the prevention and/or treatment of diseases caused by EP4 receptor activation.
    Type: Application
    Filed: December 2, 2019
    Publication date: April 2, 2020
    Applicant: ONO PHARMACEUTICAL CO., LTD.
    Inventors: Masaki ASADA, Kousuke TANI, Masaya HIROBE, Satonori HIGUCHI, Kazuhiro FUCHIBE, Ryo OIKAWA, Tohru KOTANI, Hirotsugu TAKANO
  • Publication number: 20200070513
    Abstract: A liquid injection head improving electric reliability includes: a substrate including: energy generating elements configured to apply energy for ejection to a liquid, and a substrate upper surface on which terminals respectively connected to electric wirings are provided, an ejection port forming member having: an ejection port forming surface in which the ejection ports for ejecting a liquid are formed, and a back surface on a side opposite to the ejection port forming surface, which is arranged so as to opposite to the substrate upper surface, and a sealant configured to cover connecting portions between the electric wirings and the terminals.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 5, 2020
    Inventors: Tomoki Ishiwata, Shuzo Iwanaga, Masaki Oikawa, Keiji Tomizawa, Tomohiro Sato, Akiko Hammura, Chiaki Muraoka, Shimpei Yoshikawa
  • Patent number: 10538502
    Abstract: A medicinal agent for the prevention and/or treatment of diseases caused by EP4 receptor activation. A compound having antagonistic activity against the EP4 receptor is contained as an active ingredient in the medicinal agent. The compound represented by the following general formula (I) as defined in the specification, a salt, an N-oxide, or a solvate thereof, or a prodrug of these is useful as a medicinal component having antagonistic activity against the EP4 receptor for the prevention and/or treatment of diseases caused by EP4 receptor activation.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: January 21, 2020
    Assignee: ONO PHARMACEUTICAL CO., LTD.
    Inventors: Masaki Asada, Kousuke Tani, Masaya Hirobe, Satonori Higuchi, Kazuhiro Fuchibe, Ryo Oikawa, Tohru Kotani, Hirotsugu Takano
  • Publication number: 20190317057
    Abstract: A field flow fractionation apparatus includes a separation channel provided with an inlet port and an outlet port at both ends and forming a space through which a carrier fluid flows between the inlet port and the outlet port, a separation membrane which is a wall surface that defines the separation channel and is parallel to a channel flow in which a carrier fluid flows in the separation channel from the inlet port toward the outlet port, and has a property of permeating the carrier fluid and not permeating particles to be separated, and a discharge port that discharges the carrier fluid having permeated through the separation membrane to outside. At least a part of the surface of the separation membrane is an ion exchangeable region in which a functional group having ion exchangeability is modified.
    Type: Application
    Filed: April 10, 2019
    Publication date: October 17, 2019
    Applicant: SHIMADZU CORPORATION
    Inventors: Yukio OIKAWA, Shigeyoshi Horiike, Maiko Nakaya, Masaki Kanai
  • Patent number: 10322578
    Abstract: A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 18, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoko Kudo, Takaaki Yamaguchi, Keiji Tomizawa, Masaki Oikawa, Yoshihiro Hamada, Masataka Sakurai
  • Publication number: 20180361734
    Abstract: A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 20, 2018
    Inventors: Tomoko Kudo, Takaaki Yamaguchi, Keiji Tomizawa, Masaki Oikawa, Yoshihiro Hamada, Masataka Sakurai
  • Patent number: 10040285
    Abstract: A liquid ejection head, including: a flow path forming member including a resin layer having an ejection orifice and a flow path formed therein; a substrate including a heat-generating resistance element for ejecting liquid and a protective layer having a portion for covering the heat-generating resistance element, a surface of the portion being exposed to the flow path; and an intermediate layer formed between the resin layer and the protective layer, the intermediate layer including a silicon carbonitride material.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: August 7, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masaki Oikawa, Yoshihiro Hamada, Takuya Hatsui, Makoto Sakurai, Takeru Yasuda
  • Patent number: 9975334
    Abstract: A liquid discharging head includes a recording element board in which a plurality of discharge ports configured to discharge liquid are arrayed in a first direction, a support member configured to support the recording element board and including a common liquid chamber extending in the first direction to supply the liquid to the plurality of discharge ports and a buffer chamber configured to have an opening in a ceiling surface of the common liquid chamber opposed to the recording element board and to hold a bubble, and a heater located in a region of the recording element board opposed to a part of the ceiling surface extending from the opening of the buffer chamber to an end portion in the first direction and configured to generate heat when the liquid is not discharged from the plurality of discharge ports.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: May 22, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuma Kodoi, Masaki Oikawa
  • Patent number: 9630409
    Abstract: A liquid discharge head includes a print element substrate provided with discharge ports, through which liquid is discharged; and a support member having a liquid chamber, which is provided with a communicating opening that communicates with the discharge ports, wherein the liquid chamber has a first surface provided with the communicating opening, and a second surface facing the first surface, the second surface is provided with a buffer chamber, which is a hollow space for storing gas, and the buffer chamber has, in the second surface, an opening having a projecting portion projecting toward the inner side of the opening.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: April 25, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiro Hamada, Masaki Oikawa, Hiroshi Yamada, Atsushi Omura, Takuma Kodoi, Tomotsugu Kuroda, Tomoyuki Tenkawa, Monta Matsui
  • Patent number: 9630405
    Abstract: A printing element substrate is provided that can provide an accurate temperature detection of a printing element substrate and that can suppress the printing element substrate from having a larger size. In order to realize this, sensors are arranged along the heating resistor elements arranged in the printing element substrate so that more diode sensors are arranged at a higher density in a part having a higher temperature change of the printing element substrate during the liquid ejection operation from the ejection openings.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: April 25, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toshikazu Nagatsuka, Masaki Oikawa, Atsushi Omura
  • Patent number: 9616664
    Abstract: Provided is a liquid ejection head, including: an ejection unit including: a recording element substrate including a plurality of recording elements configured to generate energy; and a support member formed of a plate-like member and configured to support the recording element substrate, the support member including: a liquid chamber configured to store liquid therein, and an inlet formed in the liquid chamber so as to allow the liquid to flow into the liquid chamber; a flow path unit including a liquid path through which the liquid is supplied into the ejection unit from a liquid tank storing the liquid therein; a joint member sandwiched between the support member and the flow path unit and configured to seal the liquid; and a buffer chamber formed in a space defined by the joint member, the ejection unit, and the flow path unit and configured to retain gas therein.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: April 11, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Oikawa, Hiroshi Yamada, Atsushi Omura, Satoshi Kimura, Kousuke Nakahata
  • Publication number: 20170057228
    Abstract: A liquid ejection head, including: a flow path forming member including a resin layer having an ejection orifice and a flow path formed therein; a substrate including a heat-generating resistance element for ejecting liquid and a protective layer having a portion for covering the heat-generating resistance element, a surface of the portion being exposed to the flow path; and an intermediate layer formed between the resin layer and the protective layer, the intermediate layer including a silicon carbonitride material.
    Type: Application
    Filed: August 5, 2016
    Publication date: March 2, 2017
    Inventors: Masaki Oikawa, Yoshihiro Hamada, Takuya Hatsui, Makoto Sakurai, Takeru Yasuda
  • Publication number: 20170021620
    Abstract: Provided is a liquid ejection head, including: an ejection unit including: a recording element substrate including a plurality of recording elements configured to generate energy; and a support member formed of a plate-like member and configured to support the recording element substrate, the support member including: a liquid chamber configured to store liquid therein, and an inlet formed in the liquid chamber so as to allow the liquid to flow into the liquid chamber; a flow path unit including a liquid path through which the liquid is supplied into the ejection unit from a liquid tank storing the liquid therein; a joint member sandwiched between the support member and the flow path unit and configured to seal the liquid; and a buffer chamber formed in a space defined by the joint member, the ejection unit, and the flow path unit and configured to retain gas therein.
    Type: Application
    Filed: July 6, 2016
    Publication date: January 26, 2017
    Inventors: Masaki Oikawa, Hiroshi Yamada, Atsushi Omura, Satoshi Kimura, Kousuke Nakahata
  • Publication number: 20170021621
    Abstract: A liquid discharge head includes a print element substrate provided with discharge ports, through which liquid is discharged; and a support member having a liquid chamber, which is provided with a communicating opening that communicates with the discharge ports, wherein the liquid chamber has a first surface provided with the communicating opening, and a second surface facing the first surface, the second surface is provided with a buffer chamber, which is a hollow space for storing gas, and the buffer chamber has, in the second surface, an opening having a projecting portion projecting toward the inner side of the opening.
    Type: Application
    Filed: July 20, 2016
    Publication date: January 26, 2017
    Inventors: Yoshihiro Hamada, Masaki Oikawa, Hiroshi Yamada, Atsushi Omura, Takuma Kodoi, Tomotsugu Kuroda, Tomoyuki Tenkawa, Monta Matsui
  • Publication number: 20170021627
    Abstract: A liquid discharging head includes a recording element board in which a plurality of discharge ports configured to discharge liquid are arrayed in a first direction, a support member configured to support the recording element board and including a common liquid chamber extending in the first direction to supply the liquid to the plurality of discharge ports and a buffer chamber configured to have an opening in a ceiling surface of the common liquid chamber opposed to the recording element board and to hold a bubble, and a heater located in a region of the recording element board opposed to a part of the ceiling surface extending from the opening of the buffer chamber to an end portion in the first direction and configured to generate heat when the liquid is not discharged from the plurality of discharge ports.
    Type: Application
    Filed: July 21, 2016
    Publication date: January 26, 2017
    Inventors: Takuma Kodoi, Masaki Oikawa
  • Patent number: 9266325
    Abstract: The print head includes an energy generating element, a chamber for accommodating liquid, and an ejection opening arranged in a position corresponding to the energy generating element. The ejection opening includes at least one projection projecting inside of the ejection opening, the ejection opening having a first region between a front end of the projection and an inner wall of the ejection opening positioned at the shortest distance from the front end, and second regions positioned on both sides of the projection and different from the first region, and when a width of the projection at a chamber-side opening face is represented as a1 and the maximum width of the projection is represented as a2, a relation a1<a2 is established and the width of the projection decreases gradually or step by step from a position having the width of a2 to the chamber-side opening face.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: February 23, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Tomizawa, Masaki Oikawa
  • Publication number: 20160009078
    Abstract: A printing element substrate is provided that can provide an accurate temperature detection of a printing element substrate and that can suppress the printing element substrate from having a larger size. In order to realize this, sensors are arranged along the heating resistor elements arranged in the printing element substrate so that more diode sensors are arranged at a higher density in a part having a higher temperature change of the printing element substrate during the liquid ejection operation from the ejection openings.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 14, 2016
    Inventors: Toshikazu Nagatsuka, Masaki Oikawa, Atsushi Omura