Patents by Inventor Seok-Young Oh

Seok-Young Oh 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).

  • Patent number: 7479259
    Abstract: A waste stream from energetics processing is treated using a pre-filter having media, preferably sand, and a metal that has a reducing potential, preferably elemental iron (Fe0). The pre-filter is connected to a zero-valent metal column reactor. The waste stream is pumped through the pre-filter to trap solids and deoxygenate it, then enters the reactor and is subjected to a reducing process. Fe0 from the reactor is transformed to the ferrous ion (Fe+2), added to the resultant product, and fed to a continuously stirred tank reactor (CSTR) in which Fenton oxidation occurs. This product is then sent to a sedimentation tank and pH-neutralized using a strong base such as sodium hydroxide (NaOH). The aqueous portion is drawn off and the sludge pumped from the sedimentation tank. Both tanks are monitored and controlled to optimize required additives, while monitoring of pressure drop across the pre-filter and column reactor establishes replacement requirements.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: January 20, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Byung J. Kim, Seok-Young Oh, Pei C. Chiu, Daniel K. Cha
  • Patent number: 7445717
    Abstract: A waste stream is treated in a pre-filter having media, preferably sand, connected below a zero-valent metal column reactor incorporating a metal with reducing potential, preferably elemental iron (Fe0); the combination preferably configured as a single unit. The waste stream is pumped through the pre-filter to trap solids and deoxygenate it, then enters the reactor and is subjected to a reducing process. Most of the Fe0 is transformed to the ferrous ion (Fe+2), mixed with the reduced product, and fed to a continuous stirred tank reactor (CSTR) in which Fenton oxidation occurs. The output is then sent to a sedimentation tank and pH-neutralized using a strong base such as sodium hydroxide (NaOH). The aqueous portion is drawn off and the sludge pumped from the sedimentation tank. The system is monitored and controlled to optimize required additives, while monitoring of pressure drop across the pre-filter and column reactor establishes replacement requirements.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: November 4, 2008
    Assignee: United States of America as represented by the Secretary of the Army
    Inventors: Daniel K. Cha, Seok-Young Oh, Pei C. Chiu, Byung J. Kim
  • Publication number: 20080099385
    Abstract: A waste stream from energetics processing is treated using a pre-filter having media, preferably sand, and a metal that has a reducing potential, preferably elemental iron (Fe0). The pre-filter is connected to a zero-valent metal column reactor. The waste stream is pumped through the pre-filter to trap solids and deoxygenate it, then enters the reactor and is subjected to a reducing process. Most of the Fe0 is transformed to the ferrous ion (Fe+2), added to the resultant product, and fed to a continuous stirred tank reactor (CSTR) in which Fenton oxidation occurs. This product is then sent to a sedimentation tank and pH-neutralized using a strong base such as sodium hydroxide (NaOH). The aqueous portion is drawn off and the sludge pumped from the sedimentation tank. Both tanks are monitored and controlled to optimize required additives, while monitoring of pressure drop across the pre-filter and column reactor establishes replacement requirements.
    Type: Application
    Filed: June 14, 2007
    Publication date: May 1, 2008
    Inventors: Byung J. Kim, Seok-Young Oh, Pei C. Chiu, Daniel K. Cha
  • Publication number: 20060016762
    Abstract: A waste stream is treated in a pre-filter having media, preferably sand, connected below a zero-valent metal column reactor incorporating a metal with reducing potential, preferably elemental iron (Fe0); the combination preferably configured as a single unit. The waste stream is pumped through the pre-filter to trap solids and deoxygenate it, then enters the reactor and is subjected to a reducing process. Most of the Fe0 is transformed to the ferrous ion (Fe+2), mixed with the reduced product, and fed to a continuous stirred tank reactor (CSTR) in which Fenton oxidation occurs. The output is then sent to a sedimentation tank and pH-neutralized using a strong base such as sodium hydroxide (NaOH). The aqueous portion is drawn off and the sludge pumped from the sedimentation tank. The system is monitored and controlled to optimize required additives, while monitoring of pressure drop across the pre-filter and column reactor establishes replacement requirements.
    Type: Application
    Filed: September 8, 2005
    Publication date: January 26, 2006
    Inventors: Daniel Cha, Seok-Young Oh, Pei Chiu, Byung Kim
  • Publication number: 20030173306
    Abstract: A waste stream from energetics processing is treated using a pre-filter having media, preferably sand, and a metal that has a reducing potential, preferably elemental iron (Fe0). The pre-filter is connected to a zero-valent metal column reactor. The waste stream is pumped through the pre-filter to trap solids and deoxygenate it, then enters the reactor and is subjected to a reducing process. Most of the Fe0 is transformed to the ferrous ion (Fe+2), added to the resultant product, and fed to a continuous stirred tank reactor (CSTR) in which Fenton oxidation occurs. This product is then sent to a sedimentation tank and pH-neutralized using a strong base such as sodium hydroxide (NaOH). The aqueous portion is drawn off and the sludge pumped from the sedimentation tank. Both tanks are monitored and controlled to optimize required additives, while monitoring of pressure drop across the pre-filter and column reactor establishes replacement requirements.
    Type: Application
    Filed: March 14, 2002
    Publication date: September 18, 2003
    Inventors: Daniel K. Cha, Pei C. Chiu, Seok-Young Oh, Byung Joon Kim
  • Patent number: D1023058
    Type: Grant
    Filed: April 28, 2023
    Date of Patent: April 16, 2024
    Inventors: Se Hoon Oh, Jong Min Kim, Dong Jin Hyun, Seok Young Youn
  • Patent number: D1023059
    Type: Grant
    Filed: April 28, 2023
    Date of Patent: April 16, 2024
    Inventors: Se Hoon Oh, Jong Min Kim, Dong Jin Hyun, Seok Young Youn