Patents by Inventor Kouji Nagashima

Kouji Nagashima 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).

  • Fluorine-containing water-soluble nonionic surface-active compounds, use thereof and process for preparation of the compounds
    Patent number: 7351748
    Abstract: The present invention provides a fluoroalkyl-group-containing compound that has high water solubility and is highly capable of reducing the surface tension of an aqueous composition. Specifically, the invention relates to a compound represented by formula (1): W—CnF2n—X—(CH2CH2O)a—Y??(1) wherein n is an integer from 2 to 6; W is a hydrogen atom or a fluorine atom; X is -M-O— (wherein R is a lower alkyl a group; and M is an alkylene group optionally substituted with a hydroxyl group), etc.; a is an integer from 10 to 50; and Y is a substituted or unsubstituted alkyl group having 4 to 19 carbon atoms, -M?-CmF2m—W (wherein m is an integer from 2 to 6; W? is a hydrogen atom or a fluorine atom; and M? is an alkylene group optionally substituted with a hydroxyl group), etc.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: April 1, 2008
    Assignee: Daikin Industries, Ltd.
    Inventors: Kouji Nagashima, Makoto Hanazawa, Yasuo Itami
  • Fluorine-containing water-soluble nonionic surface-active compounds, use thereof and process for preparation of the compounds
    Publication number: 20050170989
    Abstract: The present invention provides a fluoroalkyl-group-containing compound that has high water solubility and is highly capable of reducing the surface tension of an aqueous composition. Specifically, the invention relates to a compound represented by formula (1): W—CnF2n—X—(CH2CH2O)a—Y??(1) wherein n is an integer from 2 to 6; W is a hydrogen atom or a fluorine atom; X is -M-O— (wherein R is a lower alkyl a group; and M is an alkylene group optionally substituted with a hydroxyl group), etc.; a is an integer from 10 to 50; and Y is a substituted or unsubstituted alkyl group having 4 to 19 carbon atoms, -M?-CmF2m—W (wherein m is an integer from 2 to 6; W? is a hydrogen atom or a fluorine atom; and M? is an alkylene group optionally substituted with a hydroxyl group), etc.
    Type: Application
    Filed: April 24, 2003
    Publication date: August 4, 2005
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Kouji Nagashima, Makoto Hanazawa, Itami Yasuo