Patents by Inventor Tokuhisa Miyamatsu

Tokuhisa Miyamatsu 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 producing porous fibers
    Patent number: 4107384
    Abstract: Porous fibers which are much preferred for having various functionalities such as ion exchangeability, catalytic activity, etc. can be produced by impregnating a mixed monomer liquid of at least one monovinyl monomer and at least one polyvinyl monomer which contains a polymerization initiator in substrate fibers capable of being swollen by 30 - 500 volume % with the mixed monomer liquid, polymerizing the monomers in the state of being absorbed in the fibers and then removing said substrate fibers.
    Type: Grant
    Filed: August 10, 1976
    Date of Patent: August 15, 1978
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Morito Musha, Tokuhisa Miyamatsu
  • Method for separation and enrichment of isotopes
    Patent number: 4059670
    Abstract: Boron or uranium isotopes can be chemically separated and enriched with high speed and with high separating efficiency by using weakly basic anion exchange fibers having a diameter of not more than 100 .mu., an aspect ratio of at least 5 and an exchange capacity of at least 2 meq/g-dry fiber, which are packed in a column at a specific volume of 2.0 - 20.0 ml/g-dry fiber.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: November 22, 1977
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hidetake Kakihana, Tokuhisa Miyamatsu
  • Method of removing scale-forming substances from hot water system
    Patent number: 4045338
    Abstract: The invention is a filter which comprises a porous support covered by carbonaceous fibers having a carbon content of at least 85%, wherein the individual fibers have a length in the range of from 0.1 to 5 mm and a diameter in the range of from 1 to 50 .mu. and acidic groups in a concentration of at least 0.01 meq/g on their surface. The filter is particularly useful for removing substances from water in a supply system for a steam generator.
    Type: Grant
    Filed: June 30, 1976
    Date of Patent: August 30, 1977
    Assignees: Mitsubishi Rayon Co., Ltd., Mitsubishi Heavy Industries, Ltd.
    Inventors: Haruo Miyamoto, Tokuhisa Miyamatsu, Seiichi Shirakawa, Hidetoshi Takamoku
  • Flame retardant shaped materials
    Patent number: 3997515
    Abstract: Flame retardant, shaped materials comprising a vinyl polymer of crosslinked structure containing in its vinyl units 40 mole-% or more based on the polymer of COOH groups which have been partly converted to COOM (M: a mono- to tri-valent metal) groups, the COOM group content of said polymer being preferably 0.5 to 40 % by weight in terms of metal content.
    Type: Grant
    Filed: May 10, 1974
    Date of Patent: December 14, 1976
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kenzo Kosaka, Haruo Miyamoto, Osamu Nakagawa, Susumu Maekawa, Tokuhisa Miyamatsu, Yasuhiko Hiromoto