Patents by Inventor Kyeong Joo Na

Kyeong Joo Na 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 sensing precipitation density of sludge in waste water treatment tank and method therefor
    Patent number: 8379211
    Abstract: The present invention relates to an apparatus for sensing precipitation density of sludge in a wastewater treatment tank, more particularly to an apparatus and method for precisely taking density of sludge precipitated in a wastewater treatment tank without being contaminated by sludge. The present invention of an apparatus for sensing precipitation density of sludge in a waste water treatment tank comprises a container which is tube-shaped with a bottom thereof open and submerged in wastewater as filled with gas therein; and a sensor which is installed in the space in the container, and senses sludge density as not directly contacting with wastewater.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: February 19, 2013
    Assignee: Environmental Management Corporation
    Inventors: Jung-Pil Kwak, Wook Hyeon, Kyeong Sun Jeong, Yoo Jong Kim, Hong Soo Oh, Kyeong Joo Na
  • APPARATUS FOR SENSING PRECIPITATION DENSITY OF SLUDGE IN WASTE WATER TREATMENT TANK AND METHOD THEREFOR
    Publication number: 20100149539
    Abstract: The present invention relates to an apparatus for sensing precipitation density of sludge in a wastewater treatment tank, more particularly to an apparatus and method for precisely taking density of sludge precipitated in a wastewater treatment tank without being contaminated by sludge. The present invention of an apparatus for sensing precipitation density of sludge in a waste water treatment tank comprises a container which is tube-shaped with a bottom thereof open and submerged in wastewater as filled with gas therein; and a sensor which is installed in the space in the container, and senses sludge density as not directly contacting with wastewater.
    Type: Application
    Filed: November 13, 2007
    Publication date: June 17, 2010
    Applicant: Environment Management Corporation
    Inventors: Jung-Pil Kwak, Wook Hyeon, Kyeong Sun Jeong, Yoo Jong Kim, Hong Soo Oh, Kyeong Joo Na