Patents by Inventor Nozomu HIRAI

Nozomu HIRAI 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: 11293317
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 55 to 65%, an average pore diameter of the partition wall measured by a mercury press-in method is 5 to 10 ?m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 8 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: April 5, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Fumihiko Yoshioka, Nozomu Hirai, Kyohei Kato
  • Publication number: 20210270163
    Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 55 to 65%, an average pore diameter of the partition wall measured by a mercury press-in method is 5 to 10 ?m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (?m) on an abscissa axis and a log differential pore volume (cm3/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 8 ?m or less, the pore diameter value corresponding to a ? value width of the maximum value.
    Type: Application
    Filed: January 18, 2021
    Publication date: September 2, 2021
    Applicant: NGK Insulators, Ltd.
    Inventors: Fumihiko YOSHIOKA, Nozomu HIRAI, Kyohei KATO