Patents by Inventor Eiho Watanabe

Eiho Watanabe 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).

  • Copper ingot, copper wire material, and method for producing copper ingot
    Patent number: 10646917
    Abstract: A copper ingot of the present invention which is casted by a belt-caster type continuous casting apparatus includes: 1 ppm by mass or less of carbon; 10 ppm by mass or less of oxygen; 0.8 ppm by mass or less of hydrogen; 15 ppm by mass to 35 ppm by mass of phosphorus; and a balance of Cu and inevitable impurities, and includes inclusions formed of oxides containing carbon, phosphorus, and Cu.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: May 12, 2020
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Satoru Mori, Eiho Watanabe
  • Copper wire rod and magnet wire
    Patent number: 9679676
    Abstract: A copper wire rod with an excellent surface quality and a magnet wire, in which the occurrence of blister defects is suppressed, are provided. The copper wire rod has a composition consisting of: more than 10 ppm by mass and 30 ppm by mass or less of P; 10 ppm by mass or less of O; 1 ppm by mass or less of H; and the balance Cu and inevitable impurities, wherein hydrogen concentration after performing a heat treatment at 500° for 30 minutes in vacuum is 0.2 ppm by mass or less. The magnet wire includes: a drawn wire material produced by using the copper wire rod; and an insulating film coating an outer periphery of the drawn wire material.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: June 13, 2017
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Masato Koide, Eiho Watanabe
  • COPPER INGOT, COPPER WIRE MATERIAL, AND METHOD FOR PRODUCING COPPER INGOT
    Publication number: 20160361760
    Abstract: A copper ingot of the present invention which is casted by a belt-caster type continuous casting apparatus includes: 1 ppm by mass or less of carbon; 10 ppm by mass or less of oxygen; 0.8 ppm by mass or less of hydrogen; 15 ppm by mass to 35 ppm by mass of phosphorus; and a balance of Cu and inevitable impurities, and includes inclusions formed of oxides containing carbon, phosphorus, and Cu.
    Type: Application
    Filed: November 28, 2014
    Publication date: December 15, 2016
    Applicant: MITISUBISHI MATERIALS CORPORATION
    Inventors: Satoru Mori, Eiho Watanabe
  • COPPER WIRE ROD AND MAGNET WIRE
    Publication number: 20150213921
    Abstract: A copper wire rod with an excellent surface quality and a magnet wire, in which the occurrence of blister defects is suppressed, are provided. The copper wire rod has a composition consisting of: more than 10 ppm by mass and 30 ppm by mass or less of P; 10 ppm by mass or less of O; 1 ppm by mass or less of H; and the balance Cu and inevitable impurities, wherein hydrogen concentration after performing a heat treatment at 500° for 30 minutes in vacuum is 0.2 ppm by mass or less. The magnet wire includes: a drawn wire material produced by using the copper wire rod; and an insulating film coating an outer periphery of the drawn wire material.
    Type: Application
    Filed: August 29, 2013
    Publication date: July 30, 2015
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Masato Koide, Eiho Watanabe