Patents by Inventor Syuko SAKUGAWA

Syuko SAKUGAWA 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).

  • Onium salt, liquid composition containing said onium salt and cellulose, and cellulose recovery method
    Patent number: 10087155
    Abstract: The invention relates to an onium salt, a liquid composition containing the onium salt and cellulose, and a method for recovering cellulose. The invention makes it possible to provide an onium salt having an extremely high ability to dissolve cellulose at temperatures of 100° C. or lower. It also makes it possible to provide a liquid composition containing this onium salt and cellulose, as a composition suitable for the recovery of cellulose, and a method for recovering cellulose efficiently by using such a liquid composition containing the onium salt and cellulose.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: October 2, 2018
    Assignee: KOEI CHEMICAL COMPANY, LIMITED
    Inventors: Yuko Koga, Syuko Sakugawa
  • ONIUM SALT, LIQUID COMPOSITION CONTAINING SAID ONIUM SALT AND CELLULOSE, AND CELLULOSE RECOVERY METHOD
    Publication number: 20160009669
    Abstract: The invention relates to an onium salt, a liquid composition containing the onium salt and cellulose, and a method for recovering cellulose. The invention makes it possible to provide an onium salt having an extremely high ability to dissolve cellulose at temperatures of 100° C. or lower. It also makes it possible to provide a liquid composition containing this onium salt and cellulose, as a composition suitable for the recovery of cellulose, and a method for recovering cellulose efficiently by using such a liquid composition containing the onium salt and cellulose.
    Type: Application
    Filed: December 3, 2013
    Publication date: January 14, 2016
    Inventors: Yuko KOGA, Syuko SAKUGAWA