Patents by Inventor Ryo Sotooka

Ryo Sotooka 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).

  • Oxidized microfibrillated cellulose fibers and composition thereof
    Patent number: 11525015
    Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: December 13, 2022
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • Oxidized microfibrillated cellulose fibers and composition thereof
    Patent number: 11512432
    Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: November 29, 2022
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • Carboxymethylated microfibrillated cellulose fibers and composition thereof
    Patent number: 11466405
    Abstract: Provided is a CM-modified microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: October 11, 2022
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • Carboxymethylated microfibrillated cellulose fibers and composition thereof
    Patent number: 11453728
    Abstract: Provided is a carboxymethylated microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: September 27, 2022
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • CARBOXYMETHYLATED MICROFIBRILLAR CELLULOSE FIBERS AND COMPOSITION THEREOF
    Publication number: 20210238313
    Abstract: Provided is a CM-modified microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.
    Type: Application
    Filed: March 28, 2019
    Publication date: August 5, 2021
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • OXIDIZED MICROFIBRILLAR CELLULOSE FIBERS AND COMPOSITION THEREOF
    Publication number: 20210131037
    Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.
    Type: Application
    Filed: March 28, 2019
    Publication date: May 6, 2021
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • OXIDIZED MICROFIBRILLAR CELLULOSE FIBERS AND COMPOSITION THEREOF
    Publication number: 20210131036
    Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.
    Type: Application
    Filed: March 28, 2019
    Publication date: May 6, 2021
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • CARBOXYMETHYLATED MICROFIBRILLAR CELLULOSE FIBERS AND COMPOSITION THEREOF
    Publication number: 20210115160
    Abstract: Provided is a carboxymethylated microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.
    Type: Application
    Filed: March 28, 2019
    Publication date: April 22, 2021
    Inventors: Masato Takayama, Yoshihiro Aoki, Takanori Otsuhata, Takeo Izumiya, Hiroyuki Okumura, Tomonori Kawamata, Ryo Sotooka
  • Coated printing papers and processes for preparing them
    Patent number: 9034435
    Abstract: The present invention aims to provide techniques for preparing matte coated printing papers having high opacity and brightness as well as improved brightness variation at low basis weight with good runnability. According to the present invention, a process for preparing a matte coated printing paper having a basis weight of 60 to 90 g/m2, a brightness of 75% or more, and an opacity of 95% or more is provided, comprising applying a coating solution containing calcium carbonate by curtain coating on a base paper having a brightness of 45 to 70% made from a raw material pulp containing a total of 50% or more of deinked pulp and/or mechanical pulp.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: May 19, 2015
    Assignee: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Kazuhiko Ishizuka, Osamu Kozuka, Ryo Sotooka, Susumu Kato
  • COATED PRINTING PAPERS AND PROCESSES FOR PREPARING THEM
    Publication number: 20140023844
    Abstract: The present invention aims to provide techniques for preparing matte coated printing papers having high opacity and brightness as well as improved brightness variation at low basis weight with good runnability. According to the present invention, a process for preparing a matte coated printing paper having a basis weight of 60 to 90 g/m2, a brightness of 75% or more, and an opacity of 95% or more is provided, comprising applying a coating solution containing calcium carbonate by curtain coating on a base paper having a brightness of 45 to 70% made from a raw material pulp containing a total of 50% or more of deinked pulp and/or mechanical pulp.
    Type: Application
    Filed: March 22, 2012
    Publication date: January 23, 2014
    Applicant: NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Kazuhiko Ishizuka, Osamu Kozuka, Ryo Sotooka, Susumu Kato