Patents by Inventor Ryosuke FUJIKAWA

Ryosuke FUJIKAWA 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).

  • Water-absorbable resin powder, and method for determining elastic modulus of water-absorbable resin powder
    Patent number: 10300458
    Abstract: To provide water-absorbing resin powder particularly useful for a sanitary article, water-absorbing resin powder containing a polyacrylic acid (salt)-based water-absorbing resin as a main component is surface-crosslinked, and satisfies (1) to (3) below: (1) a proportion of a water absorbent resin powder having a particle size of not less than 150 ?m and less than 850 ?m is not less than 90 weight %; (2) a water absorption time according to a vortex method is not more than 42 seconds; and (3) an elastic modulus index (600-500) is not less than 5500.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: May 28, 2019
    Assignee: NIPPON SHOKUBAI CO., LTD.
    Inventors: Kazushi Torii, Ryosuke Fujikawa
  • WATER-ABSORBABLE RESIN POWDER, AND METHOD FOR DETERMINING ELASTIC MODULUS OF WATER-ABSORBABLE RESIN POWDER
    Publication number: 20170216817
    Abstract: To provide water-absorbing resin powder particularly useful for a sanitary article, water-absorbing resin powder containing a polyacrylic acid (salt)-based water-absorbing resin as a main component is surface-crosslinked, and satisfies (1) to (3) below: (1) a proportion of a water absorbent resin powder having a particle size of not less than 150 ?m and less than 850 ?m is not less than 90 weight %; (2) a water absorption time according to a vortex method is not more than 42 seconds; and (3) an elastic modulus index (600-500) is not less than 5500.
    Type: Application
    Filed: September 29, 2015
    Publication date: August 3, 2017
    Applicant: Nippon Shokubai Co., Ltd.
    Inventors: Kazushi TORII, Ryosuke FUJIKAWA