Patents by Inventor Hirofumi Shimura

Hirofumi Shimura 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).

  • Method for separating particles different in size, structure, or function and apparatus therefor
    Publication number: 20050155910
    Abstract: A method and an apparatus for separating fine particles of different fine particle sizes, structures, and functions are provided. The method includes the steps of introducing a group of fine particles of different sizes, structures, and functions into an atmosphere of an adsorption fluid; effecting critical adsorption of the adsorption molecular species to specific sites of the fine particles and, subsequently, separating the fine particles according to size, structure, or function based on one of the masses, the particle diameters, the fluid resistances, and the functions of adsorption abilities to a third substance, which have been changed due to the critical adsorption, or at least two of them in combination.
    Type: Application
    Filed: January 7, 2003
    Publication date: July 21, 2005
    Applicant: Japan Science and Technology Agency
    Inventors: Hirofumi Shimura, Takafumi Seto, Nobuhiro Aya, Makoto Hirasawa
  • Method for producing carbon allotrope
    Patent number: 5271890
    Abstract: A coating film of a carbon allotrope is formed on a substrate by continuously supplying a fine carbon powder onto the substrate and simultaneously irradiating the fine carbon powder with a laser beam of a high output level thereby inducing sublimation of the fine carbon powder, and quenching the sublimated fine carbon powder to cause deposition thereof on the substrate.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: December 21, 1993
    Assignee: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Hirofumi Shimura, Shinya Sasaki, Yuji Enomoto
  • Optical mirror with c/c composite substrate and an intermediate layer of molydenum, tungsten, or niobium 40 to 100 .mu.m thick
    Patent number: 4772111
    Abstract: An optical mirror in which a mirror surface formation material, e.g. aluminum, is coated on a substrate consisting of a c/c composite and having a predetermined shape. The coated mirror surface formation material layer is ultrahigh precision machined to a small thickness such that its deformation is suppressed by the substrate.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: September 20, 1988
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Hirofumi Shimura, Yuji Enomoto, Yusei Noguchi, Yoshitaka Tatsue, Hidenori Shinno
  • Self-lubricating wear-resistant composite materials
    Patent number: 3956146
    Abstract: Self-lubricating wear-resistant composite materials are produced by blending a metal powder matrix with a combination of molybdenum disulfide and tungsten disulfide powders, compression-molding the blend and then sintering the molding at 800.degree. to 1000.degree.C. When the combination of molybdenum disulfide and tungsten disulfide is blended with a metal powder matrix as described above, the molybdenum disulfide reacts with the metal powder matrix and consequently reinforces the metal matrix and the tungsten disulfide is dispersed as a lubricant element in the resultant composite material, giving rise to a composite material excellent in mechanical strength and lubricating property.
    Type: Grant
    Filed: July 18, 1974
    Date of Patent: May 11, 1976
    Assignee: Agency of Industrial Science & Technology
    Inventors: Yuko Tsuya, Kazunori Umeda, Hirofumi Shimura