Patents by Inventor Kouzou Toguro

Kouzou Toguro 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).

  • Aqueous hydroxylamine solution
    Publication number: 20010034312
    Abstract: An aqueous hydroxylamine solution containing hydroxylamine in an amount of 30 wt. % or more, which contains iron in an amount of not more than 10 ppb, metal components other than iron in an amount of not more than 5 ppb for each metal component and trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid in an amount of 0.0005 to 0.5 wt. % is obtained by distillation of a concentrated aqueous crude hydroxylamine solution using a specifically surface treated distilling apparatus.
    Type: Application
    Filed: March 26, 2001
    Publication date: October 25, 2001
    Inventors: Naoshi Imai, Kouzou Toguro
  • Aqueous hydroxylamine solution
    Patent number: 6300518
    Abstract: An aqueous hydroxylamine solution containing hydroxylamine in an amount of 30 wt. % or more, which contains iron in an amount of not more than 10 ppb, metal components other than iron in an amount of not more than 5 ppb for each metal component and trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid in an amount of 0.0005 to 0.5 wt. % is obtained by distillation of a concentrated aqueous crude hydroxylamine solution using a specifically surface treated distilling apparatus.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: October 9, 2001
    Assignee: Nissin Chemical Co., Ltd.
    Inventors: Naoshi Imai, Kouzou Toguro