Patents by Inventor Yukio Hama

Yukio Hama 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 resin particles, method of manufacturing porous resin particles, and use of porous resin particles
    Patent number: 9814656
    Abstract: Disclosed are porous resin particles which contain a polymer of a monomer mixture containing, as monomers, at least a monofunctional (meth)acrylic acid ester and a crosslinking monomer. The monofunctional (meth)acrylic acid ester accounts for 1 wt % to 50 wt % of the monomer mixture, and the crosslinking monomer accounts for 50 wt % to 99 wt % of the monomer mixture. The porous resin particles have a specific surface area of 190 m2/g to 300 m2/g and a bulk specific gravity of 0.25 g/mL to 0.45 g/mL.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: November 14, 2017
    Assignee: Sekisui Plastics Co., Ltd.
    Inventors: Yukio Hama, Koichiro Okamoto, Junko Hiroi
  • POROUS RESIN PARTICLES, METHOD OF MANUFACTURING POROUS RESIN PARTICLES, AND USE OF POROUS RESIN PARTICLES
    Publication number: 20150030842
    Abstract: Disclosed are porous resin particles which contain a polymer of a monomer mixture containing, as monomers, at least a monofunctional (meth)acrylic acid ester and a crosslinking monomer. The monofunctional (meth)acrylic acid ester accounts for 1 wt % to 50 wt % of the monomer mixture, and the crosslinking monomer accounts for 50 wt % to 99 wt % of the monomer mixture. The porous resin particles have a specific surface area of 190 m2/g to 300 m2/g and a bulk specific gravity of 0.25 g/mL to 0.45 g/mL.
    Type: Application
    Filed: March 29, 2013
    Publication date: January 29, 2015
    Inventors: Yukio Hama, Koichiro Okamoto, Junko Hiroi