Patents by Inventor Atsushi Sugano

Atsushi Sugano 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).

  • Method for regenerating filter
    Patent number: 8734655
    Abstract: [PROBLEM] There is provided a method for regenerating a filter, by which deterioration of the color tone of purified acrylic acid can be prevented. [SOLUTION] There is provided a method for regenerating a filter which has been used in a filtration step in the process for producing an acrylic acid, comprising a step (A) wherein the filter is washed with an aqueous alkaline solution, a step (B) wherein the filter is washed with water after the step (A) , and a step (C) wherein the filter is brought into contact with the acrylic acid for regeneration for at least one hour after the step (B).
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: May 27, 2014
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Koji Ueno, Kunihiko Suzuki, Atsushi Sugano
  • METHOD FOR REGENERATING FILTER
    Publication number: 20110284470
    Abstract: [PROBLEM] There is provided a method for regenerating a filter, by which deterioration of the color tone of purified acrylic acid can be prevented.
    Type: Application
    Filed: January 26, 2010
    Publication date: November 24, 2011
    Inventors: Koji Ueno, Kunihiko Suzuki, Atsushi Sugano