Patents by Inventor Haruo Kohtaki

Haruo Kohtaki 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).

  • Converter exhaust gas recovery apparatus and converter exhaust gas recovery method
    Patent number: 9052110
    Abstract: A converter exhaust gas recovery apparatus includes a furnace top oxygen analyzer that analyzes an oxygen concentration in exhaust gas on an exhaust gas path and on an upstream side of a dust collection position where dust collection is performed and a furnace top CO analyzer that analyzes a CO concentration in the exhaust gas; and a furnace bottom oxygen analyzer that irradiates the exhaust gas that flows on a downstream side of the dust collection position with a laser light and analyzes the oxygen concentration based on quantity-of-light changes caused by a light absorption of the laser light.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: June 9, 2015
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Naoki Furukawa, Haruo Kohtaki
  • CONVERTER EXHAUST GAS RECOVERY APPARATUS AND CONVERTER EXHAUST GAS RECOVERY METHOD
    Publication number: 20130333598
    Abstract: A converter exhaust gas recovery apparatus includes a furnace top oxygen analyzer that analyzes an oxygen concentration in exhaust gas on an exhaust gas path and on an upstream side of a dust collection position where dust collection is performed and a furnace top CO analyzer that analyzes a CO concentration in the exhaust gas; and a furnace bottom oxygen analyzer that irradiates the exhaust gas that flows on a downstream side of the dust collection position with a laser light and analyzes the oxygen concentration based on quantity-of-light changes caused by a light absorption of the laser light.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 19, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Naoki Furukawa, Haruo Kohtaki