Patents by Inventor Mai Taguchi

Mai Taguchi 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).

  • Polymerization inhibitor for tetrafluoroethylene
    Patent number: 7807859
    Abstract: The present invention provides a polymerization inhibitor preventing the self-polymerization of TFE and the generation of a modified polymer of a polymerization inhibitor in a distillation step, particularly in a rectification step, of TFE. The present invention provides a method of distilling tetrafluoroethylene in the presence of a polymerization inhibitor comprising a cyclohexadiene compound of the formula: R1-A-R2 wherein R1 is a hydrocarbon group having 1 to 5 carbon atoms, R2 is a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and A is a cyclohexadiene ring. The cyclohexadiene compound is preferably ?-terpinene or ?-terpinene.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: October 5, 2010
    Assignee: Daikin Industries, Ltd.
    Inventors: Mai Taguchi, Kenji Otoi, Yoshiyuki Takase, Hideya Saitou, Yoshiyuki Hiraga
  • POLYMERIZATION INHIBITOR FOR TETRAFLUOROETHYLENE
    Publication number: 20080287715
    Abstract: The present invention provides a polymerization inhibitor preventing the self-polymerization of TFE and the generation of a modified polymer of a polymerization inhibitor in a distillation step, particularly in a rectification step, of TFE. The present invention provides a method of distilling tetrafluoroethylene in the presence of a polymerization inhibitor comprising a cyclohexadiene compound of the formula: R1-A-R2 wherein R1 is a hydrocarbon group having 1 to 5 carbon atoms, R2 is a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and A is a cyclohexadiene ring. The cyclohexadiene compound is preferably ?-terpinene or ?-terpinene.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 20, 2008
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mai Taguchi, Kenji Otoi, Yoshiyuki Takase, Hideya Saitou, Yoshiyuki Hiraga