Patents by Inventor Asuka UCHINO

Asuka UCHINO 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 purifying P1,P4-di(uridine 5?-)tetraphosphate
    Patent number: 10815263
    Abstract: To provide an easy and practical iron ion removal method, as a method for purifying P1,P4-di(uridine 5?-)tetraphosphate from a solution containing iron ions. Purification is performed by a purification method including a method for purifying P1,P4-di(uridine 5?-)tetraphosphate by removing iron ions from an aqueous solution or hydrophilic solvent solution containing P1,P4-di(uridine 5?-)tetraphosphate and iron ions, including (1) a step of purification using a chelating resin packed column, and (2) a step of adjusting the pH of the solution after said purification step using the chelating resin packed column to 5.5 or less, and then crystallizing P1,P4-di(uridine 5?-)tetraphosphate, or a step of treating the solution after said purification step using the chelating resin packed column with zinc chloride-activated activated carbon.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: October 27, 2020
    Assignee: YAMASA CORPORATION
    Inventors: Yusuke Ohba, Tomoko Oyama, Fumitaka Kano, Asuka Uchino
  • METHOD FOR PURIFYING P1,P4-DI(URIDINE 5'-)TETRAPHOSPHATE
    Publication number: 20190233462
    Abstract: To provide an easy and practical iron ion removal method, as a method for purifying P1,P4-di(uridine 5?-)tetraphosphate from a solution containing iron ions. Purification is performed by a purification method including a method for purifying P1,P4-di(uridine 5?-)tetraphosphate by removing iron ions from an aqueous solution or hydrophilic solvent solution containing P1,P4-di(uridine 5?-)tetraphosphate and iron ions, including (1) a step of purification using a chelating resin packed column, and (2) a step of adjusting the pH of the solution after said purification step using the chelating resin packed column to 5.5 or less, and then crystallizing P1,P4-di(uridine 5?-)tetraphosphate, or a step of treating the solution after said purification step using the chelating resin packed column with zinc chloride-activated activated carbon.
    Type: Application
    Filed: October 24, 2017
    Publication date: August 1, 2019
    Applicant: YAMASA CORPORATION
    Inventors: Yusuke OHBA, Tomoko OYAMA, Fumitaka KANO, Asuka UCHINO