Patents by Inventor Rhokyun Kwak
Rhokyun Kwak 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).
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Patent number: 11672435Abstract: Provided is a sensor patch configured to be attached to the skin of a user. The sensor patch may include: at least one opening; and a frame surrounding the at least one opening, wherein the frame may include at least one senor configured to measure a biosignal of the user. Therefore, since the at least one sensor for measuring a biosignal is provided on the frame surrounding at least one opening, it may be possible to continuously obtain a biosignal of the user for a long period of time.Type: GrantFiled: November 21, 2019Date of Patent: June 13, 2023Assignee: Korea Institute of Science and TechnologyInventors: Hyunjung Yi, Tae-Hyung Kang, Sunho Kim, In-Suk Choi, Rhokyun Kwak, Sangha Kim, Jina Choi
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Publication number: 20230013756Abstract: A sweat sensor patch of the present disclosure is a sweat sensor patch attached to a skin of a user and used, and includes: an opening formed layer which has a first surface and a second surface which face in opposite directions, and includes an opening penetrating in a thickness direction from the first surface to the second surface; an electrode layer formed on an inner wall surface of the opening; a porous layer which is stacked on the second surface of the opening formed layer and is formed to cover the opening; and a porous pillar which extends in the thickness direction of the opening formed layer within the opening and is connected with the porous layer.Type: ApplicationFiled: September 10, 2021Publication date: January 19, 2023Inventors: Rhokyun KWAK, Jina CHOI, Sangha KIM, Hyunjung YI, Seongjin PARK
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Publication number: 20230019206Abstract: A wearable device according to the present disclosure includes: a communication portion; a body fluid sensor configured to measure conductivity in body fluid; and a controller configured to control the communication portion to transmit conductivity data to an external device in response to the frequency of rapid change in the conductivity.Type: ApplicationFiled: September 3, 2021Publication date: January 19, 2023Inventors: Hyunjung YI, Wonseop HWANG, Seongjin PARK, Rhokyun KWAK, Jina CHOI, Sangha KIM
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Publication number: 20210163319Abstract: Disclosed are a water treatment apparatus including an anode, a cathode disposed to face the anode at a distance therefrom, and at least one electrochemical unit disposed at a distance from the anode and the cathode, respectively, wherein the electrochemical unit includes a layer having bipolarity when a voltage is applied between the anode and the cathode, and a water treatment method using the same.Type: ApplicationFiled: December 3, 2020Publication date: June 3, 2021Inventors: Rhokyun KWAK, Inhee CHO, Minchan KIM, Hahnsoll RHEE, Junbeom LIM
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Publication number: 20200205673Abstract: Provided is a sensor patch configured to be attached to the skin of a user. The sensor patch may include: at least one opening; and a frame surrounding the at least one opening, wherein the frame may include at least one senor configured to measure a biosignal of the user. Therefore, since the at least one sensor for measuring a biosignal is provided on the frame surrounding at least one opening, it may be possible to continuously obtain a biosignal of the user for a long period of time.Type: ApplicationFiled: November 21, 2019Publication date: July 2, 2020Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Hyunjung YI, Tae-Hyung KANG, Sunho KIM, In-Suk CHOI, Rhokyun KWAK, Sangha KIM, Jina CHOI
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Patent number: 10585022Abstract: Provided are an extracellular vesicle collecting apparatus using an electrode and a porous membrane and a method for using the same. The extracellular vesicle collecting apparatus includes i) an upper frame in which a pair of through holes is disposed so that a buffer solution flows therethrough, ii) a buffer tube which is inserted in the through holes and in which the buffer solution flows, iii) a positive electrode disposed on the upper frame, iv) a porous membrane located below the upper frame, v) a spacer which is located below the porous membrane and has a hollow space disposed therein, vi) a plurality of guide tubes through which a blood flows in the hollow space, vii) a lower frame which is coupled to the upper frame to be opposite to the upper frame and receives the porous membrane and the spacer therein, and viii) a negative electrode provided below the lower frame. Extracellular vesicles contained in the blood are collected by the porous membrane.Type: GrantFiled: July 22, 2016Date of Patent: March 10, 2020Assignee: Korea Institute of Science and TechnologyInventors: Rhokyun Kwak, Ji Yoon Kang, Jaesung Park, Siwoo Cho
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Patent number: 10252924Abstract: A water stream is passed between two juxtaposed similar ion exchange membranes (AEMs or CEMs), forming an ion depletion and ion enrichment zones when an electric field is applied. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. Trifurcation of the output channel allows collection of concentrated, dilute and intermediate streams, with the intermediate stream serving as input to the next stage of a serialized implementation.Type: GrantFiled: October 23, 2015Date of Patent: April 9, 2019Assignee: Massachusetts Institute of TechnologyInventors: Bumjoo Kim, Jongyoon Han, Rhokyun Kwak, Bader Shafaqa Al-Anzi
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Publication number: 20190064175Abstract: Disclosed area methods for fabricating three-dimensional artificial lipid biomembrane structure arrays with sufficient reaction area and high stability on a substrate in a simpler and easier manner. The methods use constituent lipids of real cell membranes and a plurality of microwells formed on a substrate. The methods can more effectively provide biomimetic three-dimensional lipid membrane structure arrays that possess structural and/or functional properties of cell membranes.Type: ApplicationFiled: April 17, 2018Publication date: February 28, 2019Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Tae Song Kim, Rhokyun Kwak, Won Bae Han
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Patent number: 9845252Abstract: Between two juxtaposed similar ion exchange membranes (AEMs or CEMs), an ion depletion zone (dde) and ion enrichment zone (den) are generated under an electric field. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. The concentration drop (i.e. salt removal) is low and spatially gradual at relatively low voltage or current (i.e. Ohmic regime). However, at higher voltage or current (i.e. overlimiting regime), strong electroconvective vortex accelerates cation transport through CEMs, allowing us to “relocate” most salt ions. The flat depletion zone occurs with significantly low ion concentration, and corresponding strong electric field in the zone, and any charged agents (e.g. proteins and bacteria) cannot penetrate this flat zone.Type: GrantFiled: June 17, 2014Date of Patent: December 19, 2017Assignee: Massachusetts Institute of TechnologyInventors: Rhokyun Kwak, Jongyoon Han
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Patent number: 9753027Abstract: The present disclosure relates to a cantilever sensor, and a biosensor having the same, wherein the cantilever sensor including a slit formed on a flat board and a cantilever formed by the slit, a first electrode formed on the cantilever, and a second electrode formed on the flat board countered to the first electrode about the slit, wherein the electrodes are formed on the cantilever sensor having the slit, whereby sensing can be conducted by an electric method, through which the sensor can be effectively miniaturized.Type: GrantFiled: December 18, 2014Date of Patent: September 5, 2017Assignee: Korea Institute of Science and TechnologyInventors: Kyoseon Hwang, Tae Song Kim, Rhokyun Kwak, Won Woo Cho, Myung Sic Chae
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Publication number: 20170045430Abstract: Provided are an extracellular vesicle collecting apparatus using an electrode and a porous membrane and a method for using the same. The extracellular vesicle collecting apparatus includes i) an upper frame in which a pair of through holes is disposed so that a buffer solution flows therethrough, ii) a buffer tube which is inserted in the through holes and in which the buffer solution flows, iii) a positive electrode disposed on the upper frame, iv) a porous membrane located below the upper frame, v) a spacer which is located below the porous membrane and has a hollow space disposed therein, vi) a plurality of guide tubes through which a blood flows in the hollow space, vii) a lower frame which is coupled to the upper frame to be opposite to the upper frame and receives the porous membrane and the spacer therein, and viii) a negative electrode provided below the lower frame. Extracellular vesicles contained in the blood are collected by the porous membrane.Type: ApplicationFiled: July 22, 2016Publication date: February 16, 2017Applicant: Korea Institute of Science and TechnologyInventors: Rhokyun KWAK, Ji Yoon KANG, Jaesung PARK, Siwoo CHO
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Publication number: 20160115045Abstract: A water stream is passed between two juxtaposed similar ion exchange membranes (AEMs or CEMs), forming an ion depletion and ion enrichment zones when an electric field is applied. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. Trifurcation of the output channel allows collection of concentrated, dilute and intermediate streams, with the intermediate stream serving as input to the next stage of a serialized implementation.Type: ApplicationFiled: October 23, 2015Publication date: April 28, 2016Inventors: Bumjoo Kim, Jongyoon Han, Rhokyun Kwak
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Publication number: 20150253313Abstract: The present disclosure relates to a cantilever sensor, and a biosensor having the same, wherein the cantilever sensor including a slit formed on a flat board and a cantilever formed by the slit, a first electrode formed on the cantilever, and a second electrode formed on the flat board countered to the first electrode about the slit, wherein the electrodes are formed on the cantilever sensor having the slit, whereby sensing can be conducted by an electric method, through which the sensor can be effectively miniaturized.Type: ApplicationFiled: December 18, 2014Publication date: September 10, 2015Inventors: Kyoseon HWANG, Tae Song KIM, Rhokyun KWAK, Won Woo CHO, Myung Sic CHAE
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Publication number: 20140374274Abstract: Between two juxtaposed similar ion exchange membranes (AEMs or CEMs), an ion depletion zone (dde) and ion enrichment zone (den) are generated under an electric field. As cations are selectively transferred through the CEMs, for example, anions are relocated in order to achieve electro-neutrality, resulting in the concentration drop (increase) in ion depletion (enrichment) zone. The concentration drop (i.e. salt removal) is low and spatially gradual at relatively low voltage or current (i.e. Ohmic regime). However, at higher voltage or current (i.e. overlimiting regime), strong electroconvective vortex accelerates cation transport through CEMs, allowing us to “relocate” most salt ions. The flat depletion zone occurs with significantly low ion concentration, and corresponding strong electric field in the zone, and any charged agents (e.g. proteins and bacteria) cannot penetrate this flat zone.Type: ApplicationFiled: June 17, 2014Publication date: December 25, 2014Inventors: Rhokyun Kwak, Jongyoon Han