Patents by Inventor Kazunari Maeba

Kazunari Maeba 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: 9599677
    Abstract: Provided is an efficient method for determining the completion of discharging waste batteries, the method being capable of accurately identifying the discharging states of the charge remaining in the waste batteries and appropriately determining the completion of discharging without measuring the residual voltage of each of the waste batteries. The method for determining the completion of discharging waste batteries according to the present invention is characterized in that after immersing the waste batteries in a conductive liquid, the concentration of hydrogen gas produced from the liquid is measured, thereby determining the completion of discharging the charge remaining in the waste batteries.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: March 21, 2017
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kazunari Maeba, Ryozo Ushio
  • Patent number: 9347115
    Abstract: The object of the present invention is to provide a method for recovering a rare earth element, which is capable of efficiently recovering a rare earth element with high recovery rate without using any expensive chemicals, solvents or the like. In the present invention, a water-soluble salt other than sulfate ions is allowed to coexist with an aqueous solution that contains a rare earth element, and then an alkali metal sulfate is added to the aqueous solution, thereby producing a precipitate of a double sulfate of the rare earth element.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: May 24, 2016
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kazunari Maeba, Yukie Kawakami, Keiji Kudo, Masatoshi Takano, Hitoshi Ishida, Satoshi Asano, Masahiro Tanaka
  • Publication number: 20140320140
    Abstract: Provided is an efficient method for determining the completion of discharging waste batteries, the method being capable of accurately identifying the discharging states of the charge remaining in the waste batteries and appropriately determining the completion of discharging without measuring the residual voltage of each of the waste batteries. The method for determining the completion of discharging waste batteries according to the present invention is characterized in that after immersing the waste batteries in a conductive liquid, the concentration of hydrogen gas produced from the liquid is measured, thereby determining the completion of discharging the charge remaining in the waste batteries.
    Type: Application
    Filed: December 8, 2011
    Publication date: October 30, 2014
    Inventors: Kazunari MAEBA, Ryozo USHIO
  • Publication number: 20140322107
    Abstract: The object of the present invention is to provide a method for recovering a rare earth element, which is capable of efficiently recovering a rare earth element with high recovery rate without using any expensive chemicals, solvents or the like. In the present invention, a water-soluble salt other than sulfate ions is allowed to coexist with an aqueous solution that contains a rare earth element, and then an alkali metal sulfate is added to the aqueous solution, thereby producing a precipitate of a double sulfate of the rare earth element.
    Type: Application
    Filed: November 1, 2012
    Publication date: October 30, 2014
    Inventors: Kazunari Maeba, Yukie Kawakami, Keiji Kudo, Masatoshi Takano, Hitoshi Ishida, Satoshi Asano, Masahiro Tanaka
  • Patent number: 8734972
    Abstract: Provided is a battery pack processing apparatus and a processing method with which discharge can be performed in a short time when a battery pack is discharged by immersing the battery pack in a discharge liquid. A processing apparatus A is for discharging a battery pack P having single cells c and a case b by immersing the battery pack P in the discharge liquid. The processing apparatus A includes an aperture-forming machine 20 forming an aperture through which the discharge liquid can flow inside the case b by pressurizing the battery pack P. A state can thus be achieved which is the same as the state that results if the single cells c accommodated in the case b are individually immersed in the discharge liquid. A protection circuit f for preventing an over-discharge is prevented from suppressing a discharge current from the battery pack P, enabling the discharge in a short time.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: May 27, 2014
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kazunari Maeba, Ryozo Ushio
  • Publication number: 20130065092
    Abstract: Provided is a battery pack processing apparatus and a processing method with which discharge can be performed in a short time when a battery pack is discharged by immersing the battery pack in a discharge liquid. A processing apparatus A is for discharging a battery pack P having single cells c and a case b by immersing the battery pack P in the discharge liquid. The processing apparatus A includes an aperture-forming machine 20 forming an aperture through which the discharge liquid can flow inside the case b by pressurizing the battery pack P. A state can thus be achieved which is the same as the state that results if the single cells c accommodated in the case b are individually immersed in the discharge liquid. A protection circuit f for preventing an over-discharge is prevented from suppressing a discharge current from the battery pack P, enabling the discharge in a short time.
    Type: Application
    Filed: December 6, 2011
    Publication date: March 14, 2013
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Kazunari Maeba, Ryozo Ushio