Patents by Inventor Hyung Chul Hahm

Hyung Chul Hahm 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).

  • Apparatus for portable fuel cells and operating method thereof
    Patent number: 8927163
    Abstract: Disclosed are an apparatus for portable fuel cell and an operation method thereof, wherein stabilization state after initial operation can be determined using OCV.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: January 6, 2015
    Assignee: Korea Institute of Science and Technology
    Inventors: Jaeyoung Lee, Suk-Woo Nam, Tae Hoon Lim, In Hwan Oh, Sung Pil Yoon, Seong Ahn Hong, Jonghee Han, Hyoung-Juhn Kim, Eun Ae Cho, Hyung Chul Hahm, Yeong Cheon Kim
  • Multi-layered electrode for fuel cell and method for producing the same
    Patent number: 8148026
    Abstract: Disclosed are a multi-layered electrode for fuel cell and a method for producing the same, wherein the electrode can be operated under non-humidification and normal temperature, the flooding of the electrode catalyst layer can be prevented, and the long-term operation characteristic can be increased due to the prevention of the loss of the electrode catalyst layer.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: April 3, 2012
    Assignee: Korea Institute of Science and Technology
    Inventors: In Hwan Oh, Eun Ae Cho, Hyoung-juhn Kim, Heung Yong Ha, Seong Ahn Hong, Tae Hoon Lim, Suk-Woo Nam, Sung Pil Yoon, Jonghee Han, Jaeyoung Lee, Hyung Chul Hahm
  • DIRECT FORMIC ACID FUEL CELL PERFORMING REAL TIME MEASUREMENT AND CONTROL OF CONCENTRATION OF FORMIC ACID AND OPERATION METHOD THEREOF
    Publication number: 20110217614
    Abstract: Provided are a direct formic acid fuel cell and a method of operation thereof capable of maintaining performance constantly through implementing the real time measurement and control of formic acid concentration.
    Type: Application
    Filed: May 17, 2011
    Publication date: September 8, 2011
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jaeyoung LEE, Jonghee HAN, Tae Hoon LIM, Suk-Woo NAM, Sung Pil YOON, Hyoung-Juhn KIM, Eun Ae CHO, Heung Yong HA, Seong Ahn HONG, In Hwan OH, Hyung Chul HAHM, Yeong Cheon KIM, Sang Yeop LEE, Kwang Soo LEE
  • APPARATUS FOR PORTABLE FUEL CELLS AND OPERATING METHOD THEREOF
    Publication number: 20100021775
    Abstract: Disclosed are an apparatus for portable fuel cell and an operation method thereof, wherein stabilization state after initial operation can be determined using OCV.
    Type: Application
    Filed: December 8, 2006
    Publication date: January 28, 2010
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jaeyoung Lee, Suk-Woo Nam, Tae Hoon Lim, In Hwan Oh, Sung Pil Yoon, Seong Ahn Hong, Jonghee Han, Hyoung-Juhn Kim, Eun Ae Cho, Hyung Chul Hahm, Yeong Cheon Kim
  • HONEYCOMB-TYPE SOLID OXIDE FUEL CELL AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20090208814
    Abstract: The present invention relates to a honeycomb type SOFC wherein a first material, density of which is lowered upon phase-transition, a second material having higher thermal expansion coefficient than that of an electrode supporter, or a composite material of the first and second materials is filled in the electrode channel to which the collector is bonded as a material which can form an oxide under the electrode atmosphere, and a manufacturing method thereof.
    Type: Application
    Filed: December 11, 2006
    Publication date: August 20, 2009
    Applicant: Korea Institute of Science & Technology
    Inventors: Sung Pil Yoon, Tae Hoon Lim, Suk-woo Nam, Heung Yong Ha, Jonghee Han, Hyoung-Juhn Kim, Eun Ae Cho, Jaeyoung Lee, Hyung Chul Hahm
  • Multi-Layered Electrode for Fuel Cell and Method for Producing the Same
    Publication number: 20090023018
    Abstract: Disclosed are a multi-layered electrode for fuel cell and a method for producing the same, wherein the electrode can be operated under non-humidification and normal temperature, the flooding of the electrode catalyst layer can be prevented, and the long-term operation characteristic can be increased due to the prevention of the loss of the electrode catalyst layer.
    Type: Application
    Filed: October 31, 2005
    Publication date: January 22, 2009
    Applicant: Korea Institute of Science and Technology
    Inventors: In Hwan Oh, Eun Ae Cho, Hyoung-Juhn Kim, Heung Yong Ha, Seong Ahn Hong, Tae Hoon Lim, Suk-Woo Nam, Sung Pil Yoon, Jonghee Han, Jaeyoung Lee, Hyung Chul Hahm
  • Method for Analyzing the Performance of Mea and Segmented Cell Used for the Method
    Publication number: 20080299421
    Abstract: A separation plate having a gas flow path is segmented for analyzing MEA performance without segmenting an electrode or a gas diffusion layer. In advance, a MEA is operated for a long time in a real stack environment using a typical separation plate which is not segmented, and then the segmented separation plate for analyzing MEA performance is mounted to the MEA.
    Type: Application
    Filed: October 31, 2005
    Publication date: December 4, 2008
    Applicant: Korea Institute of Science & Technology
    Inventors: Eun Ae Cho, In-Hwan Oh, Hyoung-Juhn Kim, Yeong Cheon Kim, Sang-Yeop Lee, Tae-Hoon Lim, Suk-woo Nam, Sung Pil Yoon, Jonghee Han, Heung Yong Ha, Hyung Chul Hahm, Jaeyoung Lee
  • DIRECT FORMIC ACID FUEL CELL PERFORMING REAL TIME MEASUREMENT AND CONTROL OF CONCENTRATION OF FORMIC ACID AND OPERATION METHOD THEREOF
    Publication number: 20070202369
    Abstract: Provided are a direct formic acid fuel cell capable of maintaining performance constantly through implementing the real time measurement and control of formic acid concentration.
    Type: Application
    Filed: October 30, 2006
    Publication date: August 30, 2007
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jaeyoung LEE, Jonghee HAN, Tae Hoon LIM, Suk-Woo NAM, Sung Pil YOON, Hyoung-Juhn KIM, Eun Ae CHO, Heung Yong HA, Seong Ahn HONG, In Hwan OH, Hyung Chul HAHM, Yeong Cheon KIM, Sang Yeop LEE, Kwang Soo LEE