Patents by Inventor Ryuichi Yokoyama

Ryuichi Yokoyama 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: 9890222
    Abstract: The PAS production device of the present invention is a PAS production device provided with a reaction vessel equipped with one or a plurality of baffles; each baffle being supported by one or a plurality of baffle supports provided in a protruding manner on an inside wall of the reaction vessel; and at least one of the baffle supports having one or a plurality of openings preferably passing through the baffle support in the vertical direction.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: February 13, 2018
    Assignee: KUREHA CORPORATION
    Inventors: Ryuichi Yokoyama, Kohta Koichi, Michihisa Miyahara, Masanori Kobayashi, Koichi Suzuki
  • Publication number: 20170313790
    Abstract: The present invention provides a polyarylene sulfide (PAS) production device which suppresses the accumulation of deposits on a baffle (baffle board) or the like disposed inside a reaction vessel via a baffle support for the purpose of enhanced stirring efficiency or the like, thereby contributing to enhanced production efficiency, reduced cost of removing accumulation, and enhanced quality of the PAS product. The PAS production device of the present invention is a PAS production device provided with a reaction vessel equipped with one or a plurality of baffles; each baffle being supported by one or a plurality of baffle supports provided in a protruding manner on an inside wall of the reaction vessel; and at least one of the baffle supports having one or a plurality of openings preferably passing through the baffle support in the vertical direction.
    Type: Application
    Filed: September 18, 2015
    Publication date: November 2, 2017
    Applicant: Kureha Corporation
    Inventors: RYUICHI YOKOYAMA, KOHTA KOICHI, MICHIHISA MIYAHARA, MASANORI KOBAYASHI, KOICHI SUZUKI
  • Patent number: 7819653
    Abstract: Provided is a light transmissive stamper which does not generate a residue of a curable resin even when the stamper including a support substrate and an inorganic resist is used to mold a substrate. The light transmissive stamper is used when an information pattern of an optical recording medium is formed using a curable resin. The light transmissive stamper includes a light transmissive support substrate, a light transmissive inorganic resist layer having an uneven pattern corresponding to an information pattern formed therein, and a peeling layer provided on a side surface of the light transmissive stamper and having a higher peelability from the curable resin than a peelability from the light transmissive support substrate.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: October 26, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ryuichi Yokoyama
  • Patent number: 7497177
    Abstract: A looper is brought into an advance state at the end of sewing, and a looper thread hanging hook arranged on the right rear side of a needle drop position is forced to advance and retreat to catch a looper thread running to the rear side of the looper and hold it on the rear side of the needle drop position. After performing sewing for one stitch in this state, the thread cutting hook arranged on the right side of the needle drop position is forced to advance and retreat to catch the looper thread running to the rear side of the looper with a first hold section and catch needle threads and the looper thread held by the looper thread hanging hook with a second hook section, and then these threads are collectively cut by bringing them into slide-contact with a thread cutting knife.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: March 3, 2009
    Assignee: Yamato Mishin Seizo Kabushiki Kaisha
    Inventors: Yoshiyuki Tanaka, Ryuichi Yokoyama, Osamu Yasuzawa
  • Publication number: 20080286401
    Abstract: Provided is a light transmissive stamper which does not generate a residue of a curable resin even when the stamper including a support substrate and an inorganic resist is used to mold a substrate. The light transmissive stamper is used when an information pattern of an optical recording medium is formed using a curable resin. The light transmissive stamper includes a light transmissive support substrate, a light transmissive inorganic resist layer having an uneven pattern corresponding to an information pattern formed therein, and a peeling layer provided on a side surface of the light transmissive stamper and having a higher peelability from the curable resin than a peelability from the light transmissive support substrate.
    Type: Application
    Filed: May 2, 2008
    Publication date: November 20, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Ryuichi Yokoyama
  • Publication number: 20070259288
    Abstract: Provided are an optical recording medium having a multi-layer structure and a method of producing the optical recording medium, in which an adhesive layer or a hardening resin layer in a high-quality optical recording medium having the multi-layer structure can be formed at low cost with signal pattern transferability of a hardening resin layer enhanced. Specifically, an optical recording medium includes an adhesive layer or a hardening resin layer having a signal pattern surface formed by irradiating a hardening resin with an energy line. The hardening resin layer is formed by using a hardening resin containing at least two kinds of photopolymerization initiators having different absorbing wavelength ranges.
    Type: Application
    Filed: May 1, 2007
    Publication date: November 8, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Ryuichi Yokoyama
  • Publication number: 20070037092
    Abstract: A method for manufacturing a multi-layer optical recording medium that allows a transferring substrate to be reused is provided. The manufacturing method includes the steps of: forming a pattern with recesses and projections on a surface of a photopolymerizable (2P) resin layer, which is applied on a flat transferring substrate; forming a first recording layer on the pattern with the recesses and the projections; attaching the 2P resin layer and the first recording layer on a supporting substrate of the optical recording medium; and removing the transferring substrate from the 2P resin layer. The removed transferring substrate can be reused.
    Type: Application
    Filed: July 31, 2006
    Publication date: February 15, 2007
    Applicant: Canon Kabushiki Kaisha
    Inventors: Masahito Konishi, Ryuichi Yokoyama, Kyosuke Deguchi, Kuniyuki Morita
  • Publication number: 20060231002
    Abstract: A looper is brought into an advance state at the end of sewing, and a looper thread hanging hook arranged on the right rear side of a needle drop position is forced to advance and retreat to catch a looper thread running to the rear side of the looper and hold it on the rear side of the needle drop position. After performing sewing for one stitch in this state, the thread cutting hook arranged on the right side of the needle drop position is forced to advance and retreat to catch the looper thread running to the rear side of the looper with a first hold section and catch needle threads and the looper thread held by the looper thread hanging hook with a second hook section, and then these threads are collectively cut by bringing them into slide-contact with a thread cutting knife.
    Type: Application
    Filed: April 6, 2006
    Publication date: October 19, 2006
    Applicant: YAMATO MISHIN SEIZO KABUSHIKI KAISHA
    Inventors: Yoshiyuki Tanaka, Ryuichi Yokoyama, Osamu Yasuzawa
  • Publication number: 20060180271
    Abstract: A method of manufacturing an optical recording medium is provided, which is capable of manufacturing a highly reliable optical recording medium, an eccentricity of each recording layer formed on each of a plurality of sheet-like substrates may be suppressed, and which does not involve a complicated process. Specifically, a plurality of sheet-like substrates are laminated by a laminating apparatus under the condition that a recording layer is formed on one surface of each of the plurality of sheet-like substrates, and an uncured adhesive layer is formed on the other surface thereof. The laminating apparatus performs centering of each sheet-like substrate before the process of curing the adhesive layers. Then, the adhesive layers are cured, and a punching apparatus punches the three-layered sheet-like substrates into a disk shape in a collective manner, thereafter.
    Type: Application
    Filed: February 2, 2006
    Publication date: August 17, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ryuichi Yokoyama, Kuniyuki Morita, Masahito Konishi, Kyosuke Deguchi
  • Publication number: 20050195352
    Abstract: The liquid crystal display device of the invention has a plurality of pixels each having a first electrode, a second electrode facing the first electrode, and a vertically aligned liquid crystal layer placed between the first and second electrodes. The device includes: ribs in a stripe shape having a first width placed in the first electrode side of the liquid crystal layer; slits in a stripe shape having a second width placed in the second electrode side of the liquid crystal layer; and liquid crystal regions having a third width defined between the ribs and the slits. The third width is in a range between 2 ?m and 14 ?m, and the ratio of the third width to the second width is in a range between 1.0 and less than 1.5.
    Type: Application
    Filed: March 8, 2005
    Publication date: September 8, 2005
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Masumi Kubo, Akihiro Yamamoto, Hiroyuki Ohgami, Takashi Ochi, Ryuichi Yokoyama
  • Publication number: 20020001762
    Abstract: A color filter comprising a substrate, a shielding layer formed on the substrate and having an opening, color mixing prevention barriers formed on the shielding layer, and colored portions formed between the color mixing prevention barriers, the optical density of the colorants in the colored portions being raised toward the substrate.
    Type: Application
    Filed: December 21, 1999
    Publication date: January 3, 2002
    Inventors: SHOJI SHIBA, HIDEAKI TAKAO, RYUICHI YOKOYAMA, MASASHI SOBUE, TAKESHI OKADA
  • Patent number: 6309783
    Abstract: A color filter comprising a substrate, a shielding layer formed on the substrate and having an opening, color mixing prevention barriers formed on the shielding layer, and colored portions formed between the color mixing prevention barriers, the optical density of the colorants in the colored portions being raised toward the substrate.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: October 30, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shoji Shiba, Hideaki Takao, Ryuichi Yokoyama, Masashi Sobue, Takeshi Okada
  • Patent number: 6177214
    Abstract: In a method of manufacturing a color filter, an ink-jet head discharges ink onto a substrate formed on a surface of an ink receiving layer and colors each pixel of the color filter. The ink-jet head discharges ink onto the position of each pixel by using an alignment mark as a reference which is formed on the ink receiving layer.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: January 23, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuichi Yokoyama, Katsuhiko Takano, Hideaki Takao, Masashi Sobue, Shoji Shiba, Takeshi Okada
  • Patent number: 6143450
    Abstract: A color filter substrate manufacturing method includes the steps of forming a black matrix having a plurality of first apertures of the same shape on a support substrate, forming a color filter by an ink jet system, and forming an alignment mark within an effective display region. The alignment mark includes a second aperture different in shape from the first apertures of the black matrix and is used to form the color filter.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: November 7, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Sobue, Hideaki Takao, Ryuichi Yokoyama, Shoji Shiba, Takeshi Okada
  • Patent number: 6127072
    Abstract: Disclosed herein is a process for producing a color filter substrate, which comprises the steps of forming a resin layer for coloration, which develops an ink-accepting property by irradiation of light, on a base; forming a light-screening layer on the resin layer for coloration; exposing the resin layer for coloration through the light-screening layer as a mask; and applying color inks to the resin layer for coloration.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: October 3, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shoji Shiba, Hideaki Takao, Ryuichi Yokoyama, Akio Kashiwazaki, Masashi Sobue, Takeshi Okada
  • Patent number: 5714222
    Abstract: The optical recording medium has an optically transparent substrate having a center hole, a recording layer formed on the substrate, and a protective layer. The protective layer has an opening whose center coincides with a center of the center hole of the substrate, and the opening of the protective layer is larger than the center hole of the substrate. The optical recording medium is produced by a process including the steps of forming the protective layer for covering the recording layer so that the protective layer has an opening whose center coincides with a center of the center hole, and forming the opening of the protective layer so that it is larger than the center hole of the substrate. The step of forming the protective layer may be achieved using a spin coating method.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: February 3, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ryuichi Yokoyama