Patents by Inventor Gang Cui
Gang Cui 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: 8277635Abstract: Disclosed herein is an electrochemical biosensor measuring device which comprises at least two photodiodes for emitting light beams at regular time intervals in a sequential manner, with the insertion of an electrochemical biosensor thereto, and a detector for sensing the emitted light beams, thereby identifying the production lot information recorded on a production lot information identification portion on the electrochemical biosensor. Thus, the device enjoys economic advantages of not requiring a high-priced optical filter in detecting the light absorbed through or reflected from the production identification information recorded in biosensor and a complicated software algorithm to recover the production lot information.Type: GrantFiled: February 26, 2008Date of Patent: October 2, 2012Assignee: I-Sens, Inc.Inventors: Moon Hwan Kim, Keun Ki Kim, Gang Cui, Hakhyun Nam, Geun Sig Cha
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Patent number: 8226004Abstract: A biosensor can be measured by a method that includes: determining malfunction of a production lot information sensing unit; alerting malfunction when the production lot information sensing unit malfunctions; encoding the production lot information through the production lot information sensing unit when the production lot information sensing unit does not malfunction; and detecting a component of a sample through a biosensor strip by using the encoded production lot information.Type: GrantFiled: November 11, 2008Date of Patent: July 24, 2012Assignee: i-SENS, Inc.Inventors: Geun Sig Cha, Hakhyun Nam, Gang Cui, Keun-Ki Kim, Shim-Ho Lee
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Publication number: 20110210726Abstract: Disclosed are an electrochemical biosensor which comprises a production lot information identification portion, on which information is recorded in a magnetization mark, and a measuring device which can automatically identify the production lot information of the biosensor with the insertion of the electrochemical biosensor into the measuring device. The electrochemical biosensor and the measuring device thereof can record production lot information in the form of magnetization marks on an electrochemical biosensor strip and read the information as digital signals through a magnetoresistance sensor device, which can be mounted on the surface of a circuit board using Surface Mounted Technology (SMT). Without the need for a high-priced filter or a complicated calculation system, the magnetic detector system has a simple construction and realizes economic efficiency in the construction of the measuring device.Type: ApplicationFiled: February 26, 2008Publication date: September 1, 2011Applicant: I-SENS, INC.Inventors: Gang Cui, Keun Ki Kim, Dong Hoon Han, Moon Hwan Kim, Hakhyun Nam, Geun Sig Cha
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Publication number: 20110147457Abstract: A biosensor can be measured by a method that includes: determining malfunction of a production lot information sensing unit; alerting malfunction when the production lot information sensing unit malfunctions; encoding the production lot information through the production lot information sensing unit when the production lot information sensing unit does not malfunction; and detecting a component of a sample through a biosensor strip by using the encoded production lot information.Type: ApplicationFiled: November 11, 2008Publication date: June 23, 2011Applicant: I-SENS, INC.Inventors: Geun Sig Cha, Hakhyun Nam, Gang Cui, Keun-Ki Kim, Shim-Ho Lee
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Publication number: 20110011739Abstract: Disclosed is an electrochemical biosensor having a sample introduction channel in which an insulator is employed to introduce a small amount of a sample uniformly and accurately and to adjust an area of a working electrode, thereby guaranteeing the accurate quantitative analysis of a sample. Provided with a sample collection barrier at a sample entrance, the biosensor allows a sample to be introduced at higher accuracy and to be analyzed with higher reproducibility and reliability.Type: ApplicationFiled: October 24, 2008Publication date: January 20, 2011Applicant: I-SENS, INC.Inventor: Gang Cui
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Publication number: 20100126882Abstract: Disclosed herein is an electrochemical biosensor measuring device which comprises at least two photodiodes for emitting light beams at regular time intervals in a sequential manner, with the insertion of an electrochemical biosensor thereto, and a detector for sensing the emitted light beams, thereby identifying the production lot information recorded on a production lot information identification portion on the electrochemical biosensor. Thus, the device enjoys economic advantages of not requiring a high-priced optical filter in detecting the light absorbed through or reflected from the production identification information recorded in biosensor and a complicated software algorithm to recover the production lot information.Type: ApplicationFiled: February 26, 2008Publication date: May 27, 2010Inventors: Moon Hwan Kim, Keun Ki Kim, Gang Cui, Hakhyun Nam, Geun Sig Cha
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Patent number: 7704747Abstract: Disclosed herein is a dual blood glucose meter. The dual blood glucose meter includes a meter body, a measurement strip, a variety of electronic parts and upper and lower strip receiving ports. The meter body is provided with a liquid crystal display panel on the front thereof to display measured numerical values and various pieces of pictorial information. The measurement strip is brought into contact with blood at a blood collection spot so as to measure blood glucose of the blood. The electronic parts are used to measure the blood glucose of the blood. The upper and lower strip receiving ports are formed at upper and lower ends of the meter body to receive the measurement strip, and are each electrically connected to the electric parts.Type: GrantFiled: April 15, 2004Date of Patent: April 27, 2010Assignee: i-SENS, Inc.Inventors: Moon Hwan Kim, Keun Ki Kim, Gang Cui, Hakhyun Nam, Geun-Sig Cha
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Patent number: 7695608Abstract: An electrochemical biosensor and a biosensor measuring device. The electrochemical biosensor includes a plurality of electrodes, capillary sample cell portions, reaction reagent layers, electrode connection portions, and a production lot information identification portion. The production lot information identification portion is configured such that the production lot information is recorded thereon has one or more infrared absorption/reflection marks, which indicate information about differences between production lots through the printing and/or attachment of colored or colorless materials, having differences in absorbency or reflectivity of infrared rays, in conformity of a predetermined pattern or through the attachment of transparent films.Type: GrantFiled: May 14, 2007Date of Patent: April 13, 2010Assignee: i-SENS, Inc.Inventors: Keun Ki Kim, Jae Hyun Yoo, Gang Cui, Moon Hwan Kim, Hakhyun Nam, Geun Sig Cha
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Patent number: 7662111Abstract: Disclosed herein is a vacuum assisted auto-lancing device. The device includes a housing (200) having a body (210) which has a lever hole. An actuating lever (300) includes an actuating switch (310) seated on the lever hole and having first and second actuating steps, a switch cap (320), and a switch cover (330). The device also includes a holding unit (400) having a first stem (410), a second stem (430), and a stem cap (450). A trigger (500) has a first trigger unit activated by the first actuating step, and a second trigger unit activated by the second actuating step. A lancet holder (524) holding a lancet (522) is secured to an end of the first trigger unit. The device includes a blood collecting unit (600) having an adjusting screw, an adjusting slider, and an end cap, and a vacuum unit (700) having a plunger and a body cap.Type: GrantFiled: February 20, 2004Date of Patent: February 16, 2010Inventors: Eun Jong Cha, Mi Sook Park, Gang Cui, Hak Hyun Nam, Geun Sig Cha
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Publication number: 20100032321Abstract: Disclosed is an electrochemical biosensor measuring device which can be used together with an electrochemical biosensor. The biosensor measuring device comprises an electrical connection portion which is electrically connected with the electrodes of the biosensor upon the insertion of the biosensor there into, and a connector having a structure in which at least one light absorption or reflection path sequentially comprising a light emitter-production lot information identification portion-detector unit is provided to identify the production lot information recorded in the biosensor. The electrochemical biosensor measuring device can automatically identify the production lot information of the biosensor, encoded in the form of a hue or hole marks, upon the insertion of the electrochemical biosensor into the measuring device, thereby obviating the need to manually input the production lot information of the biosensor.Type: ApplicationFiled: February 26, 2008Publication date: February 11, 2010Inventors: Keun Ki Kim, Moon Hwan Kim, Jae Hyun Yoo, Gang Cui, Hakhyun Nam, Geun Sig Cha
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Publication number: 20090308744Abstract: Disclosed relates to an electrochemical determination system of glycated proteins, the system comprising: a filtering means for filtering labeled compounds bound to glycated proteins and non-glycated proteins after adding labeling compounds, capable of selectively binding to the glycated proteins to a solution, in which glycated/non-glycated proteins coexist, to be bound all to the glycated proteins; and a quantifying means for quantifying the filtered labeling compounds, not bound to the glycated proteins. The system of the present invention filters the residual labeled compounds left after binding to glycated proteins to quantify, instead of directly quantifying glycated proteins via the known glycated protein determination methods, thus simplifying the configuration of the system that can provide exact determinations with a low cost.Type: ApplicationFiled: July 29, 2006Publication date: December 17, 2009Applicant: I-SENS, INC.Inventors: Hakhyun Nam, Fenghua Zhang, Soon Hye Yang, Bo Kyeong Kang, Gang Cui, Moon Hee Choi, Joung Su Lee, Geun Sig Cha
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Patent number: 7455756Abstract: A biosensor, for use in measurement of an analyte, includes a microporous membrane support, a first electrode system, a second electrode system, and a pair of insulating films. The first electrode system is formed on the surface of the microporous membrane support and the second electrode system is formed on the opposite surface of the microporous membrane support. The biosensor enables a rapid, simple, separation-free, and selective detection of the analytes. The biosensor does not require any bulky additional electrode, so that miniaturization, point-of-car testing, and disposability can be achieved.Type: GrantFiled: May 30, 2002Date of Patent: November 25, 2008Assignee: i-SENS, Inc.Inventors: Moon-Hee Choi, Gang Cui, Jae-Hyun Yoo, Ho-Choll Cho, Min-Sun Kim, Fenghua Zhang, Hakhyun Nam, Geun-Sig Cha
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Publication number: 20080237062Abstract: An electrochemical biosensor and a biosensor measuring device. The electrochemical biosensor includes a plurality of electrodes, capillary sample cell portions, reaction reagent layers, electrode connection portions, and a production lot information identification portion. The production lot information identification portion is configured such that the production lot information is recorded thereon has one or more infrared absorption/reflection marks, which indicate information about differences between production lots through the printing and/or attachment of colored or colorless materials, having differences in absorbency or reflectivity of infrared rays, in conformity of a predetermined pattern or through the attachment of transparent films.Type: ApplicationFiled: May 14, 2007Publication date: October 2, 2008Applicant: I-SENS, INC.Inventors: Keun Ki Kim, Jae Hyun Yoo, Gang Cui, Moon Hwan Kim, Hakhyun Nam, Geun Sig Cha
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Patent number: 7288174Abstract: There is provided the reagent layer composition that can substantially reduce the measurement bias arising from hematocrits. The addition of fatty acid (4-20 carbons) and quaternary ammonium salt to a commonly used reagent layer composition composed of an enzyme, an electron transfer mediator, and several water soluble polymers not only reduce the hematocrit level-dependent bias but also provide very stable performance for an extended period of time. Disclosed are also various types of sub microliter sample volume electrochemical biosensors that are suitable to use with the reagent layer composition of present invention.Type: GrantFiled: February 12, 2004Date of Patent: October 30, 2007Assignee: i-SENS, Inc.Inventors: Gang Cui, Jae-Hyun Yoo, Moon-Hwan Kim, Ju-Yong Kim, Jung-Hee Uhm, Hakhyun Nam, Geun-Sig Cha
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Patent number: 7258769Abstract: There is provided electrochemical biosensors with a sample introducing part, comprising a sample introducing passage, an air discharge passage, and a void. The sample introducing passage communicates with the air discharge passage, and the void is formed at the point of communication. Also, disclosed is the electrochemical biosensor with the said sample introducing part and a fluidity determining electrode.Type: GrantFiled: April 17, 2002Date of Patent: August 21, 2007Assignee: I-Sens, Inc.Inventors: Gang Cui, Ju-Yong Kim, Moon-Hwan Kim
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Publication number: 20070043283Abstract: A method and apparatus for non-invasively determining the concentration of a substance in blood, such as glucose, include a sample portion arranged for contacting an eye region of a user to obtain a tear fluid sample, a sensor in communication with the sample portion for generating a signal related to the tear substance concentration, and a processor in communication with the sensor for determining a blood substance concentration corresponding to the tear substance concentration.Type: ApplicationFiled: October 20, 2006Publication date: February 22, 2007Applicant: EYELAB GROUP, LLCInventors: Bruce Cohan, Geun Cha, Mark Meyerhoff, Hakhyun Nam, Donald Gillespie, Gang Cui, Jong Kim, Zvi Flanders
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Patent number: 7133712Abstract: A method and apparatus for non-invasively determining the concentration of a substance in blood, such as glucose, include a sample portion arranged for contacting an eye region of a user to obtain a tear fluid sample, a sensor in communication with the sample portion for generating a signal related to the tear substance concentration, and a processor in communication with the sensor for determining a blood substance concentration corresponding to the tear substance concentration.Type: GrantFiled: April 1, 2003Date of Patent: November 7, 2006Assignee: Eyelab Group, LLCInventors: Bruce E. Cohan, Geun Sig Cha, Mark E. Meyerhoff, Hakhyun Nam, Donald E. Gillespie, Gang Cui, Jong Sik Kim, Zvi Flanders
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Publication number: 20060175205Abstract: Disclosed herein is a method for measuring blood glucose levels, using an electrochemical biosensor provided with a converse-type thin-layer electrochemical cell. The electrochemical cell comprising: a working electrode formed on a flat insulating substrate; an auxiliary electrode formed on a separate flat insulating substrate so as to face the working electrode; a fluidity-determining electrode, formed at a predetermined distance from the working electrode on the flat insulating substrate used for the working electrode or the auxiliary electrode; an adhesive spacer, provided with a sample-introducing part having a micro-passage, for spatially separating the working electrode and the auxiliary electrode by being interposed therebetween; an electrode connector, printed with a thick conductive material on a portion of the auxiliary electrode, for three-dimensionally connecting the working electrode to the auxiliary electrode; and a reagent layer containing an electron transfer mediator and an oxidation enzyme.Type: ApplicationFiled: January 31, 2006Publication date: August 10, 2006Inventors: Gang Cui, Jae Yoo, Moon Kim, Ju Kim, Joung Lee, Keun Kim, Hakhyun Nam, Geun Cha
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Publication number: 20060155215Abstract: Disclosed herein is a vacuum assisted auto-lancing device. The device includes a housing (200) having a body (210) which has a lever hole. An actuating lever (300) includes an actuating switch (310) seated on the lever hole and having first and second actuating steps, a switch cap (320), and a switch cover (330). The device also includes a holding unit (400) having a first stem (410), a second stem (430), and a stem cap (450). A trigger (500) has a first trigger unit activated by the first actuating step, and a second trigger unit activated by the second actuating step. A lancet holder (524) holding a lancet (522) is secured to an end of the first trigger unit. The device includes a blood collecting unit (600) having an adjusting screw, an adjusting slider, and an end cap, and a vacuum unit (700) having a plunger and a body cap.Type: ApplicationFiled: February 20, 2004Publication date: July 13, 2006Inventors: Eun Cha, Mi Sook Park, Gang Cui, Hak Nam, Geun Cha
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Patent number: 6964734Abstract: The present invention disclose a method for fabricating planar reference electrodes. Particularly, the present invention relates to the planar reference electrode comprising plate (4); electrode connection (1); electrode (3); insulating membrane (2); inner reference solution (5); junction (7 or 9); and protecting membrane (6, 8 or 9), and processes for fabrication thereof, in which the junction is composed of porous material such as cotton thread, glass fiber, cellulose nitrate, cellulose acetate, filter paper and any material that can produce capillary action; porous polymer membrane; or a capillary either directly printed on the substrate or inserted with a thin film. The planar reference electrode of the present invention exhibit stable electric potential and short activation period, and may be used in both potentiometry and voltammetry. The planar reference electrodes of the present invention can be easily miniaturized and mass produced.Type: GrantFiled: March 27, 2001Date of Patent: November 15, 2005Assignee: Geun Sig ChaInventors: Geun Sig Cha, Gang Cui, Jina Yoo, Joung Su Lee, Hakhyun Nam