Patents by Inventor Hiroshi Tsugura

Hiroshi Tsugura 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 for estimating nitric acid and nitrous acid ions
    Patent number: 5968835
    Abstract: To estimate nitric acid ions and nitrous acid ions in a sample solution, a method is proposed which comprises the steps of (a) feeding both the sample solution and a reducing agent to an acidic solution which is flowing in a thin pipe; (b) positively mixing the sample solution and the reducing agent and thus reacting the same in a given portion of the pipe; (c) leading the reacted solution to a gas/liquid separator thereby to separate a gaseous phase from the reacted solution; and (d) estimating the nitric acid ions and nitrous acid ions in the gaseous phase.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: October 19, 1999
    Assignee: Kabushiki Kaisha Meidensha
    Inventors: Toyoaki Aoki, Hiroshi Tsugura
  • Device and method for estimating three nitrogen-including ionic substances in water
    Patent number: 5668014
    Abstract: To estimate nitric acid ions and nitrous acid ions in a sample solution, a method is proposed which comprises the steps of (a) feeding both the sample solution and a reducing agent to an acidic solution which is flowing in a thin pipe; (b) positively mixing the sample solution and the reducing agent and thus reacting the same in a given portion of the pipe; (c) leading the reacted solution to a gas/liquid separator thereby to separate a gaseous phase from the reacted solution; and (d) estimating the nitric acid ions and nitrous acid ions in the gaseous phase.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: September 16, 1997
    Assignee: Kabushiki Kaisha Meidensha
    Inventors: Toyoaki Aoki, Hiroshi Tsugura