Patents by Inventor Masumi Nakai

Masumi Nakai 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).

  • Porous sintered metal and filter thereof, and method for producing porous sintered metal
    Patent number: 7195735
    Abstract: A porous sintered metal comprising voids at least partially communicating with each other, and pores provided in walls of the voids, the porous sintered metal having a BET surface area of 700 cm2/cm3 or more, and an average diameter of the pores being 1 ?m or more when measured by a mercury press-in method. The porous sintered metal is produced by blending a metal powder, a binder and resin particles to prepare a mixture in which the resin particles are dispersed; molding the mixture to provide a green body; selectively extracting the resin particles from the green body with a solvent; debinding the extracted green body by heating; and sintering the debound green body.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: March 27, 2007
    Assignees: Hitachi Metals, Ltd., HMY, Ltd.
    Inventors: Kenji Date, Masumi Nakai
  • Porous sintered metal and filter thereof, and method for producing porous sintered metal
    Patent number: 6964817
    Abstract: A porous sintered metal comprising voids at least partially communicating with each other, and pores provided in walls of the voids, the porous sintered metal having a BET surface area of 700 cm2/cm3 or more, and an average diameter of the pores being 1 ?m or more when measured by a mercury press-in method. The porous sintered metal is produced by blending a metal powder, a binder and resin particles to prepare a mixture in which the resin particles are dispersed; molding the mixture to provide a green body; selectively extracting the resin particles from the green body with a solvent; debinding the extracted green body by heating; and sintering the debound green body.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: November 15, 2005
    Assignees: Hitachi Metals, Ltd., Hmy, Ltd.
    Inventors: Kenji Date, Masumi Nakai
  • Porous sintered metal and filter thereof, and method for producing porous sintered metal
    Publication number: 20050191199
    Abstract: A porous sintered metal comprising voids at least partially communicating with each other, and pores provided in walls of the voids, the porous sintered metal having a BET surface area of 700 cm2/cm3 or more, and an average diameter of the pores being 1 ?m or more when measured by a mercury press-in method. The porous sintered metal is produced by blending a metal powder, a binder and resin particles to prepare a mixture in which the resin particles are dispersed; molding the mixture to provide a green body; selectively extracting the resin particles from the green body with a solvent; debinding the extracted green body by heating; and sintering the debound green body.
    Type: Application
    Filed: April 13, 2005
    Publication date: September 1, 2005
    Inventors: Kenji Date, Masumi Nakai
  • Porous sintered metal and filter thereof, and method for producing porous sintered metal
    Publication number: 20040072010
    Abstract: A porous sintered metal comprising voids at least partially communicating with each other, and pores provided in walls of the voids, the porous sintered metal having a BET surface area of 700 cm2/cm3 or more, and an average diameter of the pores being 1 &mgr;m or more when measured by a mercury press-in method. The porous sintered metal is produced by blending a metal powder, a binder and resin particles to prepare a mixture in which the resin particles are dispersed; molding the mixture to provide a green body; selectively extracting the resin particles from the green body with a solvent; debinding the extracted green body by heating; and sintering the debound green body.
    Type: Application
    Filed: July 14, 2003
    Publication date: April 15, 2004
    Applicant: HITACHI METALS, LTD.
    Inventors: Kenji Date, Masumi Nakai