Patents by Inventor Toyohide Kumagae

Toyohide Kumagae 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).

  • Production method of ceramic honeycomb filter
    Patent number: 9097154
    Abstract: A method for producing a ceramic honeycomb filter having predetermined plugs comprising immersing the end portions of a ceramic honeycomb structure having large numbers of flow paths, with its end surface covered with a mask provided with holes only at positions corresponding to the predetermined flow paths, in a plugging material slurry, so that the plugging material slurry is introduced into the end portions of the predetermined flow paths, and removing plugging material protrusions formed in the flow paths that should not be plugged.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: August 4, 2015
    Assignee: HITACHI METALS, LTD.
    Inventors: Toyohide Kumagae, Shinya Tokumaru, Hirohisa Suwabe
  • PRODUCTION METHOD OF CERAMIC HONEYCOMB FILTER
    Publication number: 20100272890
    Abstract: A method for producing a ceramic honeycomb filter having predetermined plugs comprising immersing the end portions of a ceramic honeycomb structure having large numbers of flow paths, with its end surface covered with a mask provided with holes only at positions corresponding to the predetermined flow paths, in a plugging material slurry, so that the plugging material slurry is introduced into the end portions of the predetermined flow paths, and removing plugging material protrusions formed in the flow paths that should not be plugged.
    Type: Application
    Filed: June 24, 2010
    Publication date: October 28, 2010
    Applicant: Hitachi Metals, Ltd.
    Inventors: Toyohide KUMAGAE, Shinya Tokumaru, Hirohisa Suwabe
  • Production method of ceramic honeycomb filter
    Publication number: 20080079194
    Abstract: A method for producing a ceramic honeycomb filter having predetermined plugs comprising immersing the end portions of a ceramic honeycomb structure having large numbers of flow paths, with its end surface covered with a mask provided with holes only at positions corresponding to the predetermined flow paths, in a plugging material slurry, so that the plugging material slurry is introduced into the end portions of the predetermined flow paths, and removing plugging material protrusions formed in the flow paths that should not be plugged.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Applicant: Hitachi Metals, Ltd.
    Inventors: Toyohide Kumagae, Shinya Tokumaru, Hirohisa Suwabe