Patents by Inventor Takabumi Nagai

Takabumi Nagai 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).

  • Electroplating in presence of co2
    Publication number: 20070175763
    Abstract: The present invention provides a method for conducting electroplating in the presence of CO2 and a metal salt-containing aqueous solution, wherein the CO2 is in the form of liquid, subcritical or supercritical, the method being characterized in that a nonionic compound having a CO2-affinitive moiety is further added to the system where the aqueous solution and CO2 coexist. The method of the present invention improves the efficiency of the electrochemical reaction process and enables formation of an excellent metal film.
    Type: Application
    Filed: February 14, 2005
    Publication date: August 2, 2007
    Inventors: Takabumi Nagai, Kazuhisa Fujii, Hideaki Asai
  • Process for the recovery of surfactants
    Patent number: 7157002
    Abstract: The present invention relates to a method for recovering a surfactant from a water-carbon dioxide system comprising at least one type of surfactant, water and carbon dioxide, the method comprising the step of bringing the water-carbon dioxide system into contact with a dehydrating agent to remove water. Furthermore, the present invention relates to a method comprising the steps of installing a device for selectively removing a removal target in a circulation line in which circulated is a mixed system comprising carbon dioxide, a carbon dioxide-compatible surfactant and/or a cosolvent, and a removal target; circulating the mixed system; and selectively removing the removal target that has been incorporated into the surfactant and/or cosolvent.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: January 2, 2007
    Assignee: Daikin Industries, Ltd.
    Inventors: Takabumi Nagai, Kazuhisa Fujii, Hideaki Asai
  • Process for the recovery of surfactants
    Publication number: 20060124552
    Abstract: The present invention relates to a method for recovering a surfactant from a water-carbon dioxide system comprising at least one type of surfactant, water and carbon dioxide, the method comprising the step of bringing the water-carbon dioxide system into contact with a dehydrating agent to remove water. Furthermore, the present invention relates to a method comprising the steps of installing a device for selectively removing a removal target in a circulation line in which circulated is a mixed system comprising carbon dioxide, a carbon dioxide-compatible surfactant and/or a cosolvent, and a removal target; circulating the mixed system; and selectively removing the removal target that has been incorporated into the surfactant and/or cosolvent.
    Type: Application
    Filed: June 18, 2004
    Publication date: June 15, 2006
    Inventors: Takabumi Nagai, Kazuhisa Fujii, Hideaki Asai