Patents by Inventor Katsuji ARISAWA

Katsuji ARISAWA 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).

  • Ink composition, writing tool and method for producing ink composition
    Patent number: 11613663
    Abstract: The ink composition contains titanium oxide particles having an average particle size of 0.1 ?m or more and 0.4 ?m or less, hollow resin particles having an average particle size of 1.0 ?m or more and 2.0 ?m or less, a polysaccharide and water, wherein the titanium oxide particles and the hollow resin particles are negatively charged.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: March 28, 2023
    Inventors: Katsuji Arisawa, Yoshitaka Morimoto, Hirohisa Suzuki, Hiroyuki Saitou
  • INK COMPOSITION , WRITING TOOL AND METHOD FOR PRODUCING INK COMPOSITION
    Publication number: 20190338151
    Abstract: The ink composition contains titanium oxide particles having an average particle size of 0.1 ?m or more and 0.4 ?m or less, hollow resin particles having an average particle size of 1.0 ?m or more and 2.0 ?m or less, a polysaccharide and water, wherein the titanium oxide particles and the hollow resin particles are negatively charged.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 7, 2019
    Inventors: Katsuji ARISAWA, Yoshitaka MORIMOTO, Hirohisa SUZUKI, Hiroyuki SAITOU