Patents by Inventor Kazumi Yamamoto

Kazumi Yamamoto 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: 11096318
    Abstract: In accordance with the present invention, there is provided a noise suppression sheet that is capable of absorbing noise at a wide frequency range of from 10 MHz to 1 GHz. The present invention relates to a ferrite laminate formed by laminating a conductive layer comprising a conductive filler and a resin and a magnetic layer comprising ferrite; the conductive layer has a surface electrical resistance of of 100 to 5000 ?/?; the ferrite is partitioned into small parts; and a real part of a magnetic permeability of the ferrite as measured at 10 MHz is 130 to 480, and an imaginary part of of the magnetic permeability of the ferrite as measured at 10 MHz is 30 to 440.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: August 17, 2021
    Assignee: TODA KOGYO CORP.
    Inventors: Yoji Okano, Akihiro Yoshida, Kazumi Yamamoto, Yuji Omote
  • Publication number: 20210070710
    Abstract: [Problem] The present invention provides a method for producing and isolating a target quinolone derivative using general industrial facilities with high purity. [Solving means] The present invention also provides a method for producing a quinolone derivative, the method including reacting a ketone with an anthranilic acid derivative using an aluminum halide and removing the aluminum halide under basic conditions.
    Type: Application
    Filed: December 12, 2018
    Publication date: March 11, 2021
    Applicants: NIPPON KAYAKU CO., LTD., MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Akinori MORIKAWA, Hirokazu KURODA, Kazumi YAMAMOTO, Nozomu NAKANISHI
  • Patent number: 10398068
    Abstract: The present disclosure provides an electromagnetic shielding sheet characterized in that the sheet includes, electrically conductive carbon, a soft magnetic powder, and a base material made from a resin in which a filler including the conductive carbon and the soft magnetic powder has been mixed.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: August 27, 2019
    Assignee: Molex, LLC
    Inventors: Hideki Hozono, Mikiji Tanaka, Daisuke Yoshikawa, Kazumi Yamamoto
  • Publication number: 20180199474
    Abstract: In accordance with the present invention, there is provided a noise suppression sheet that is capable of absorbing noise at a wide frequency range of from 10 MHz to 1 GHz. The present invention relates to a ferrite laminate formed by laminating a conductive layer comprising a conductive filler and a resin and a magnetic layer comprising ferrite; the conductive layer has a surface electrical resistance of of 100 to 5000 ?/?; the ferrite is partitioned into small parts; and a real part of a magnetic permeability of the ferrite as measured at 10 MHz is 130 to 480, and an imaginary part of of the magnetic permeability of the ferrite as measured at 10 MHz is 30 to 440.
    Type: Application
    Filed: July 11, 2016
    Publication date: July 12, 2018
    Inventors: Yoji OKANO, Akihiro YOSHIDA, Kazumi YAMAMOTO, Yuji OMOTE
  • Publication number: 20180092260
    Abstract: The present disclosure provides an electromagnetic shielding sheet characterized in that the sheet includes, electrically conductive carbon, a soft magnetic powder, and a base material made from a resin in which a filler including the conductive carbon and the soft magnetic powder has been mixed.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Applicant: Molex, LLC
    Inventors: Hideki HOZONO, Mikiji TANAKA, Daisuke YOSHIKAWA, Kazumi YAMAMOTO
  • Patent number: 9502774
    Abstract: The present invention relates to a folded dipole antenna comprising a magnetic material comprising a hexagonal Z-type ferrite and/or a hexagonal Y-type ferrite as a main component in which a radiation element and a reflection element each having a folded dipole structure are disposed, and an RF tag comprising the folded dipole antenna and an IC chip connected to the folded dipole antenna. The RF tag according to the present invention has a smaller size than that of the conventional RF tags and is not susceptible to adverse influence from ambient environments, and can be operated at an UHF band or surrounding frequency bands thereof.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: November 22, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Yoji Okano, Tetsuya Kimura, Kazumi Yamamoto, Takanori Doi, Yoshiro Sato
  • Publication number: 20160276079
    Abstract: An object of the present invention is to provide a power transmission device for a non-contact power feeder system which has high power transmission efficiency and high impact resistance. The above object of the present invention can be achieved by a soft magnetic ferrite resin composition molded product comprising a filler and a binder, in which the filler comprises soft magnetic ferrite particles having an average particle diameter of 5 to 35 ?m, the binder comprises at least one material selected from the group consisting of a thermoplastic resin and a soft polyolefin resin, and the soft magnetic ferrite resin composition molded product has a molding density of 3.2 to 4.7 g/cm3 and a magnetic permeability of 5 to 15, and a power transmission device for a non-contact power feeder system which comprises the above soft magnetic ferrite resin composition molded product.
    Type: Application
    Filed: October 30, 2014
    Publication date: September 22, 2016
    Inventors: Kazushi NISHIMOTO, Yoji OKANO, Hiromitsu SAKURAI, Kazumi YAMAMOTO, Tomohiro DOTE, Yasushi NISHIO, Yasuhiko FUJII
  • Patent number: 9444194
    Abstract: A connector with a sheet has a housing mated with another connector, a terminal secured to the housing and contacting another terminal on the other connector, and a sheet affixed to the housing. The sheet has a laminate structure which includes a soft magnetic layer having real parts of complex relative permeability at 100 MHz of from 20 to 45, and a conductive/dielectric layer having an electrical resistance of from 0.5 to 20 ?·cm.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: September 13, 2016
    Assignees: MOLEX, LLC, TODA KOGYO CORP.
    Inventors: Mikiji Tanaka, Hideki Hozono, Mari Niita, Shigeyuki Hoshikawa, Kazumi Yamamoto
  • Patent number: 9394204
    Abstract: The present invention relates to a molded ferrite sheet having opposing surfaces and a thickness in a range of 30 ?m to 430 ?m, at least one surface of said opposing surfaces having the following surface roughness characteristics (a) to (c): (a) a center line average roughness is in a range of 170 nm to 800 nm, (b) a maximum height is in a range of 3 ?m to 10 ?m, and (c) an area occupancy rate of cross-sectional area taken along a horizontal plane at a depth of 50% of the maximum height in a square of side 100 ?m is in a range of 10 to 80%.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: July 19, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Tetsuya Kimura, Tomohiro Dote, Kazumi Yamamoto, Takanori Doi, Yoji Okano
  • Patent number: 9380736
    Abstract: According to the present invention, there are provided an electromagnetic interference suppression material capable of exhibiting a good low-pass filter characteristic in an extensive frequency band ranging from a low frequency to a high frequency, and an electromagnetic interference suppression sheet using the electromagnetic interference suppression material. When laminating a conductive layer having a surface electrical resistance of 100 to 5000?/? in which 5 to 25% by volume of a conductive carbon is mixed, and a magnetic layer having a magnetic permeability with an actual number portion of 3 to 45 in which a magnetic material is mixed, to each other, it is possible to obtain an electromagnetic interference suppression sheet suitable for high-density packaging of electronic equipments which is excellent in low-pass filter characteristic in a near electromagnetic field.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: June 28, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventor: Kazumi Yamamoto
  • Publication number: 20150334883
    Abstract: The present invention relates to an electromagnetic interference suppression sheet comprising a conductive layer comprising a conductive metal filler and having a surface electrical resistance of 100 to 5000 ?/?, and a magnetic layer comprising a magnetic material mixed therein and having a real part ?? of a magnetic permeability of 3 to 45 as measured at 100 MHz which is laminated on the conductive layer. The electromagnetic interference suppression sheet of the present invention is suitable for high-density packaging of electronic devices, and has an excellent low-pass filter characteristic in a near electromagnetic field in a wide frequency band ranging from a low frequency to a high frequency.
    Type: Application
    Filed: December 17, 2013
    Publication date: November 19, 2015
    Inventor: Kazumi YAMAMOTO
  • Patent number: 9126934
    Abstract: An objective of the present invention is to provide a process for producing 4-carbonyl oxyquinoline derivatives useful as agricultural and horticultural pesticides and fungicides. The objective can be attained by a process for producing 4-carbonyl oxyquinoline derivatives represented by general formula (1), the process including reacting a quinolone derivative with a halogenated compound or an acid anhydride in the presence of a phase transfer catalyst and a base.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: September 8, 2015
    Assignees: NIPPON KAYAKU CO., LTD., MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Shizuo Shimano, Akinori Morikawa, Kenichi Yamamoto, Hiroki Hotta, Kazumi Yamamoto, Nozomu Nakanishi, Nobuto Minowa
  • Publication number: 20140210131
    Abstract: An electromagnetic noise suppression sheet obtained by using combination of a conductive carbon and spinel ferrite particles having a cumulative 50% volume particle diameter of 1 to 10 ?m, can exhibit an excellent transmission attenuation power ratio and a reduced return loss in a near electromagnetic field, and is suitable for high-density mounting. The electromagnetic noise suppression sheet of the present invention can be produced by the process of the present invention which includes the steps of applying a coating material in which the conductive carbon and the spinel ferrite particles having a cumulative 50% volume particle diameter of 1 to 10 ?m are dispersed, to form a coating film having a thickness of 10 to 100 ?m after dried, and subjecting the resulting coating film to thermoforming under pressure.
    Type: Application
    Filed: March 31, 2014
    Publication date: July 31, 2014
    Applicant: TODA KOGYO CORPORATION
    Inventors: Kazumi YAMAMOTO, Tetsuya KIMURA
  • Patent number: 8759529
    Abstract: A process for producing compound C represented by formula C is disclosed: wherein R? represents substituent groups as described herein. The process can produce pyripyropene derivatives that have acyloxy groups at the 1- and 11-positions and a hydroxyl group at the 7-position and are useful as insect pest control agents at a high yield.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: June 24, 2014
    Assignee: BASF SE
    Inventors: Kimihiko Goto, Kazumi Yamamoto, Masayo Sakai, Masaaki Mitomi, Takashi Ando
  • Publication number: 20140141220
    Abstract: According to the present invention, there are provided an electromagnetic interference suppression material capable of exhibiting a good low-pass filter characteristic in an extensive frequency band ranging from a low frequency to a high frequency, and an electromagnetic interference suppression sheet using the electromagnetic interference suppression material. When laminating a conductive layer having a surface electrical resistance of 100 to 5000 ?/? in which 5 to 25% by volume of a conductive carbon is mixed, and a magnetic layer having a magnetic permeability with an actual number portion of 3 to 45 in which a magnetic material is mixed, to each other, it is possible to obtain an electromagnetic interference suppression sheet suitable for high-density packaging of electronic equipments which is excellent in low-pass filter characteristic in a near electromagnetic field.
    Type: Application
    Filed: June 14, 2012
    Publication date: May 22, 2014
    Inventor: Kazumi Yamamoto
  • Patent number: 8723054
    Abstract: An electromagnetic noise suppression sheet obtained by using combination of a conductive carbon and spinel ferrite particles having a cumulative 50% volume particle diameter of 1 to 10 ?m, can exhibit an excellent transmission attenuation power ratio and a reduced return loss in a near electromagnetic field, and is suitable for high-density mounting. The electromagnetic noise suppression sheet of the present invention can be produced by the process of the present invention which includes the steps of applying a coating material in which the conductive carbon and the spinel ferrite particles having a cumulative 50% volume particle diameter of 1 to 10 ?m are dispersed, to form a coating film having a thickness of 10 to 100 ?m after dried, and subjecting the resulting coating film to thermoforming under pressure.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: May 13, 2014
    Assignee: Toda Kogyo Corporation
    Inventors: Kazumi Yamamoto, Tetsuya Kimura
  • Patent number: 8648195
    Abstract: An objective of the present invention is to provide a crystal of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate having stable physicochemical properties. The objective is attained by a crystal of 2-ethyl-3,7-dimethyl-6-(4-(trifluoromethoxy)phenoxy)quinoline-4-yl methyl carbonate that exhibits a diffraction peak pattern shown in FIG. 1 as determined by powder X-ray diffractometry.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: February 11, 2014
    Assignees: Nippon Kayaku Co., Ltd., Meiji Seika Pharma Co., Ltd.
    Inventors: Kouki Tanigakiuchi, Mikio Sekiguchi, Hiroki Hotta, Shizuo Shimano, Akinori Morikawa, Kazumi Yamamoto, Nozomu Nakanishi, Nobuto Minowa, Takashi Watanabe
  • Publication number: 20130265205
    Abstract: The present invention relates to a folded dipole antenna comprising a magnetic material comprising a hexagonal Z-type ferrite and/or a hexagonal Y-type ferrite as a main component in which a radiation element and a reflection element each having a folded dipole structure are disposed, and an RF tag comprising the folded dipole antenna and an IC chip connected to the folded dipole antenna. The RF tag according to the present invention has a smaller size than that of the conventional RF tags and is not susceptible to adverse influence from ambient environments, and can be operated at an UHF band or surrounding frequency bands thereof.
    Type: Application
    Filed: November 10, 2011
    Publication date: October 10, 2013
    Applicant: TODA KOGYO CORPORATION
    Inventors: Yoji Okano, Tetsuya Kimura, Kazumi Yamamoto, Takanori Doi, Yoshiro Sato
  • Publication number: 20130245271
    Abstract: An objective of the present invention is to provide a process for producing 4-carbonyl oxyquinoline derivatives useful as agricultural and horticultural pesticides and fungicides. The objective can be attained by a process for producing 4-carbonyl oxyquinoline derivatives represented by general formula (1), the process including reacting a quinolone derivative with a halogenated compound or an acid anhydride in the presence of a phase transfer catalyst and a base.
    Type: Application
    Filed: November 16, 2011
    Publication date: September 19, 2013
    Applicants: MEIJI SEIKA PHARMA CO., LTD., NIPPON KAYAKU CO., LTD.
    Inventors: Shizuo Shimano, Akinori Morikawa, Kenichi Yamamoto, Hiroki Hotta, Kazumi Yamamoto, Nozomu Nakanishi, Nobuto Minowa
  • Publication number: 20130102637
    Abstract: Provided is a novel pest control agent using at least one imino derivative represented by the following chemical formula (I):
    Type: Application
    Filed: July 4, 2011
    Publication date: April 25, 2013
    Applicants: GIFU UNIVERSITY, MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Shinzo Kagabu, Masaaki Mitomi, Shigeki Kitsuda, Masahiro Nomura, Satoshi Nakamura, Kazumi Yamamoto