Patents by Inventor Masatake Tagawa

Masatake Tagawa 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 and Device for Inactivating New Coronavirus
    Publication number: 20240173452
    Abstract: Provided are a new coronavirus inactivation method and a new coronavirus inactivation device that are capable of quick inactivation, are safe, and are practical. The new coronavirus inactivation device is a device for inactivating new coronavirus SARS-CoV-2 by singlet oxygen, the device including: a contactor configured to bring an aqueous rose bengal solution and air containing the new coronavirus SARS-CoV-2 into contact with each other in a state where light is applied to the aqueous rose bengal solution, wherein the aqueous rose bengal solution has a concentration of not less than 10 ?M and not greater than 50 ?M, and the light applied to the aqueous rose bengal solution has an illuminance of not less than 500 lux and not greater than 8000 lux.
    Type: Application
    Filed: November 30, 2023
    Publication date: May 30, 2024
    Inventor: Masatake Tagawa
  • Deodorizing material, process for manufacturing deodorizing material, and deodorizing device
    Patent number: 9381504
    Abstract: A deodorizing material is a cured substance that is obtained by dissolving a photosensitizing colorant in an unsaturated polyester resin composition which contains unsaturated polyester and a monomer copolymerizable with the unsaturated polyester and which is in a liquid state at a room temperature, and by adding a curing agent to let the liquid cured. This deodorizing material changes from the base state to the singlet excitation state, and further to the triplet excitation state upon irradiation with light in a gas phase containing oxygen and odor components. This energy is given to the oxygen molecules to produce singlet oxygen. The oxidation action of the produced singlet oxygen decomposes the odor components.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: July 5, 2016
    Assignees: HIROSHIMA UNIVERSITY, YOKOTA TRADING CO., LTD.
    Inventors: Yoshikuni Masaoka, Masatake Tagawa, Toshihiko Ohara
  • DEODORIZING MATERIAL, PROCESS FOR MANUFACTURING DEODORIZING MATERIAL, AND DEODORIZING DEVICE
    Publication number: 20150202608
    Abstract: A deodorizing material is a cured substance that is obtained by dissolving a photosensitizing colorant in an unsaturated polyester resin composition which contains unsaturated polyester and a monomer copolymerizable with the unsaturated polyester and which is in a liquid state at a room temperature, and by adding a curing agent to let the liquid cured. This deodorizing material changes from the base state to the singlet excitation state, and further to the triplet excitation state upon irradiation with light in a gas phase containing oxygen and odor components. This energy is given to the oxygen molecules to produce singlet oxygen. The oxidation action of the produced singlet oxygen decomposes the odor components.
    Type: Application
    Filed: July 17, 2013
    Publication date: July 23, 2015
    Inventors: Yoshikuni Masaoka, Masatake Tagawa, Toshihiko Ohara