Patents by Inventor Yoshitaka Kamata

Yoshitaka Kamata 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: 11935673
    Abstract: Provided are a varistor forming paste, a cured product thereof, and a varistor, that can increase the degree of freedom in designing an electronic device, and can exhibit appropriate varistor characteristics. The varistor forming paste contains an epoxy resin (A), a curing agent (B), and a carbon aerogel (C).
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: March 19, 2024
    Assignee: NAMICS CORPORATION
    Inventors: Pawel Czubarow, Daisuke Hashimoto, Yoshitaka Kamata, Toshiyuki Sato
  • Publication number: 20230139930
    Abstract: A low-voltage varistor includes a cured body of a resin composition for forming the low-voltage varistor. The resin composition includes: (A) at least one selected from carbon nanotubes and carbon aerogels; and (B) at least one selected from epoxy resin and acrylic resin.
    Type: Application
    Filed: March 1, 2021
    Publication date: May 4, 2023
    Applicant: NAMICS CORPORATION
    Inventors: Yoshitaka KAMATA, Toshiyuki SATO
  • Publication number: 20230042359
    Abstract: An electromagnetic shielding composition includes silver particles (A), and a first solvent (B). The first solvent (B) has at least one structure selected from the group consisting of a structure represented by the formula (1) and a structure represented by the formula (2) and has a boiling point of less than 200° C.
    Type: Application
    Filed: December 4, 2020
    Publication date: February 9, 2023
    Applicant: NAMICS CORPORATION
    Inventors: Takashi YONEDA, Yoshitaka KAMATA, Noriyuki SAKAI, Hironobu TSUBURA, Satomi KAWAMOTO, Yoshito YAMADA
  • Publication number: 20230013549
    Abstract: Provided are a varistor forming paste, a cured product thereof, and a varistor, that can increase the degree of freedom in designing an electronic device, and can exhibit appropriate varistor characteristics. The varistor forming paste contains an epoxy resin (A), a curing agent (B), and a carbon aerogel (C).
    Type: Application
    Filed: September 25, 2020
    Publication date: January 19, 2023
    Inventors: Pawel Czubarow, Daisuke Hashimoto, Yoshitaka Kamata, Toshiyuki Sato
  • Publication number: 20220185667
    Abstract: A porous carbon has an ID/IG of 2.0 or more in a Raman spectrum measured by Raman spectroscopy with respect to the porous carbon wherein the IG is an accumulated intensity of a peak for G band around 1590 cm?1, and the ID is an accumulated intensity of a peak for D band around 1350 cm?1. The porous carbon has pores having a size of less than 1 ?m. The porous carbon can be contained in a resin composition for producing a varistor element.
    Type: Application
    Filed: February 13, 2020
    Publication date: June 16, 2022
    Applicant: NAMICS CORPORATION
    Inventors: Pawel CZUBAROW, Yoshitaka KAMATA, Toshiyuki SATO
  • Patent number: 11339269
    Abstract: Provided are a resin composition for forming a varistor and a varistor capable of increasing freedom in the design of substrates, ICs, or electronics. The resin composition for forming a varistor includes (A) an epoxy resin, (B) a curing agent, (C) carbon nanotubes, and (D) a dispersant. The (C) carbon nanotubes may be single-walled carbon nanotubes, multi-walled carbon nanotubes, or a combination thereof. The (D) dispersant includes a polyalkyl oxide surfactant. The polyalkyl oxide surfactant has a polyalkyl ether skeleton in the molecule.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: May 24, 2022
    Assignee: NAMICS CORPORATION
    Inventor: Yoshitaka Kamata
  • Publication number: 20210155769
    Abstract: Provided are a resin composition for forming a varistor and a varistor capable of increasing freedom in the design of substrates, ICs, or electronics. The resin composition for forming a varistor includes (A) an epoxy resin, (B) a curing agent, (C) carbon nanotubes, and (D) a dispersant. The (C) carbon nanotubes may be single-walled carbon nanotubes, multi-walled carbon nanotubes, or a combination thereof. The (D) dispersant includes a polyalkyl oxide surfactant. The polyalkyl oxide surfactant has a polyalkyl ether skeleton in the molecule.
    Type: Application
    Filed: December 4, 2018
    Publication date: May 27, 2021
    Applicant: NAMICS CORPORATION
    Inventor: Yoshitaka KAMATA
  • Patent number: 10141090
    Abstract: A resin composition which includes (A) an epoxy resin, (B) a curing agent, and (C) carbon nanotubes, wherein the carbon nanotubes contain therein semiconducting single-walled carbon nanotubes in an amount of 70% by weight or more. A cured product of a paste made from the resin composition can be used to form a varistor element.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: November 27, 2018
    Assignee: NAMICS CORPORATION
    Inventors: Yoshitaka Kamata, Pawel Czubarow, Toshiyuki Sato, Takayuki Fujita
  • Publication number: 20180197663
    Abstract: A resin composition which includes (A) an epoxy resin, (B) a curing agent, and (C) carbon nanotubes, wherein the carbon nanotubes contain therein semiconducting single-walled carbon nanotubes in an amount of 70% by weight or more. A cured product of a paste made from the resin composition can be used to form a varistor element.
    Type: Application
    Filed: January 2, 2018
    Publication date: July 12, 2018
    Applicant: NAMICS CORPORATION
    Inventors: Yoshitaka KAMATA, Pawel CZUBAROW, Toshiyuki SATO, Takayuki FUJITA
  • Publication number: 20090057121
    Abstract: The present invention has an object thereof is to provide a key base which can be thinned, a key sheet which can be thinned and a method of forming a key base which can be thinned. According to a first aspect, there is provided a key base comprising: a flexible film sheet; and a plurality of pressers made of a non-thermo-curing type material and formed integrally with the film sheet on the backside of the film sheet.
    Type: Application
    Filed: August 23, 2006
    Publication date: March 5, 2009
    Applicant: SUNARROW LTD.
    Inventors: Minoru Yoshida, Yoshitaka Kamata
  • Publication number: 20070295588
    Abstract: A key sheet and a key top of novel design such that a character or a symbol cannot be recognized visually when not illuminated and can be recognized visually only when illuminated. In the key sheet comprising a key top for pressing a key and a key pad on which a plurality of key tops are placed in a matrix and which supports them integrally through transparent adhesive, the key top is composed of a transparent material, e.g. resin or glass, and provided with a metal thin film (half-silvered mirror) on the upper or lower surfaces. Consequently, a character or a symbol cannot be recognized visually when not illuminated and can be recognized visually only when illuminated.
    Type: Application
    Filed: August 25, 2005
    Publication date: December 27, 2007
    Inventor: Yoshitaka Kamata
  • Patent number: 6008869
    Abstract: The present invention provides a display device substrate includes a first wiring layer formed on a substrate made of an insulating material, a second wiring layer formed to cross the first wiring layer, and an insulating film interposed between the first and second wiring layers at a cross point portion therebetween, wherein the first wiring layer is constituted by an electrode wiring layer made of a material containing aluminum as a main component and a surface covering layer formed by causing a refractory metal to denature the electrode wiring layer.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: December 28, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuhisa Oana, Nobuki Ibaraki, Masayuki Dohjo, Yoshitaka Kamata