Patents by Inventor Hye-In Won

Hye-In Won 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).

  • RECYLING METHOD OF PURE AMMONIUM SULFATE AQUEOUS SOLUTION
    Publication number: 20150344318
    Abstract: Provided is a method of recycling a high purity ammonium sulfate aqueous solution including: adding slurry obtained by mixing water, aqueous ammonia, and gypsum with each other and a predetermined amount of carbon dioxide to a reactor to performing a carbonation reaction, wherein an ammonium sulfate aqueous solution produced in the reactor is circulated in the reactor.
    Type: Application
    Filed: May 20, 2015
    Publication date: December 3, 2015
    Inventors: MYUNG GYU LEE, YOUNG NAM JANG, HWAN JU JO, SOO CHUN CHAE, HYE-IN WON
  • Method of removing asbestos from asbestos-containing materials by 99% through low temperature heat treatment
    Patent number: 9079055
    Abstract: Disclosed is a method of removing asbestos from an asbestos-containing material by 99% through low temperature heat treatment. The method includes mixing an asbestos-containing material with an oxalic acid at a weight ratio in a range of 1:0.002 to 1:1 and performing heat treatment with respect to a mixture at a temperature of 90° C. to 110° C. to remove asbestos from the asbestos-containing material by 99% or more.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: July 14, 2015
    Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES
    Inventors: Young-Nam Jang, Soo-Chun Chae, Myung-Kyu Lee, Hye-In Won, Kyoung-Won Ryu
  • METHOD OF REMOVING ASBESTOS FROM ASBESTOS-CONTAINING MATERIALS BY 99% THROUGH LOW TEMPERATURE HEAT TREATMENT
    Publication number: 20140243575
    Abstract: Disclosed is a method of removing asbestos from an asbestos-containing material by 99% through low temperature heat treatment. The method includes mixing an asbestos-containing material with an oxalic acid at a weight ratio in a range of 1:0.002 to 1:1 and performing heat treatment with respect to a mixture at a temperature of 90° C. to 110° C. to remove asbestos from the asbestos-containing material by 99% or more.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 28, 2014
    Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES
    Inventors: Young-Nam Jang, Soo-Chun Chae, Myung-Kyu Lee, Hye-In Won, Kyoung-Won Ryu