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).
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Patent number: 9890222Abstract: 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: GrantFiled: September 18, 2015Date of Patent: February 13, 2018Assignee: KUREHA CORPORATIONInventors: Ryuichi Yokoyama, Kohta Koichi, Michihisa Miyahara, Masanori Kobayashi, Koichi Suzuki
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Publication number: 20170313790Abstract: 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: ApplicationFiled: September 18, 2015Publication date: November 2, 2017Applicant: Kureha CorporationInventors: RYUICHI YOKOYAMA, KOHTA KOICHI, MICHIHISA MIYAHARA, MASANORI KOBAYASHI, KOICHI SUZUKI
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Patent number: 7819653Abstract: 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: GrantFiled: May 2, 2008Date of Patent: October 26, 2010Assignee: Canon Kabushiki KaishaInventor: Ryuichi Yokoyama
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Patent number: 7497177Abstract: 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: GrantFiled: April 6, 2006Date of Patent: March 3, 2009Assignee: Yamato Mishin Seizo Kabushiki KaishaInventors: Yoshiyuki Tanaka, Ryuichi Yokoyama, Osamu Yasuzawa
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Publication number: 20080286401Abstract: 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: ApplicationFiled: May 2, 2008Publication date: November 20, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Ryuichi Yokoyama
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Publication number: 20070259288Abstract: 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: ApplicationFiled: May 1, 2007Publication date: November 8, 2007Applicant: CANON KABUSHIKI KAISHAInventor: Ryuichi Yokoyama
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Publication number: 20070037092Abstract: 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: ApplicationFiled: July 31, 2006Publication date: February 15, 2007Applicant: Canon Kabushiki KaishaInventors: Masahito Konishi, Ryuichi Yokoyama, Kyosuke Deguchi, Kuniyuki Morita
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Publication number: 20060231002Abstract: 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: ApplicationFiled: April 6, 2006Publication date: October 19, 2006Applicant: YAMATO MISHIN SEIZO KABUSHIKI KAISHAInventors: Yoshiyuki Tanaka, Ryuichi Yokoyama, Osamu Yasuzawa
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Publication number: 20060180271Abstract: 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: ApplicationFiled: February 2, 2006Publication date: August 17, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Ryuichi Yokoyama, Kuniyuki Morita, Masahito Konishi, Kyosuke Deguchi
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Publication number: 20050195352Abstract: 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: ApplicationFiled: March 8, 2005Publication date: September 8, 2005Applicant: Sharp Kabushiki KaishaInventors: Masumi Kubo, Akihiro Yamamoto, Hiroyuki Ohgami, Takashi Ochi, Ryuichi Yokoyama
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Publication number: 20020001762Abstract: 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: ApplicationFiled: December 21, 1999Publication date: January 3, 2002Inventors: SHOJI SHIBA, HIDEAKI TAKAO, RYUICHI YOKOYAMA, MASASHI SOBUE, TAKESHI OKADA
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Patent number: 6309783Abstract: 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: GrantFiled: December 21, 1999Date of Patent: October 30, 2001Assignee: Canon Kabushiki KaishaInventors: Shoji Shiba, Hideaki Takao, Ryuichi Yokoyama, Masashi Sobue, Takeshi Okada
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Patent number: 6177214Abstract: 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: GrantFiled: May 27, 1998Date of Patent: January 23, 2001Assignee: Canon Kabushiki KaishaInventors: Ryuichi Yokoyama, Katsuhiko Takano, Hideaki Takao, Masashi Sobue, Shoji Shiba, Takeshi Okada
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Patent number: 6143450Abstract: 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: GrantFiled: September 3, 1998Date of Patent: November 7, 2000Assignee: Canon Kabushiki KaishaInventors: Masashi Sobue, Hideaki Takao, Ryuichi Yokoyama, Shoji Shiba, Takeshi Okada
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Patent number: 6127072Abstract: 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: GrantFiled: June 1, 1998Date of Patent: October 3, 2000Assignee: Canon Kabushiki KaishaInventors: Shoji Shiba, Hideaki Takao, Ryuichi Yokoyama, Akio Kashiwazaki, Masashi Sobue, Takeshi Okada
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Patent number: 5714222Abstract: 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: GrantFiled: January 19, 1996Date of Patent: February 3, 1998Assignee: Canon Kabushiki KaishaInventor: Ryuichi Yokoyama