Patents by Inventor Holger Kotzan
Holger Kotzan 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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Publication number: 20150099954Abstract: Sensor elements are provided for determining at least one analyte concentration in a body fluid. The sensor elements are at least partially implantable into a body tissue and have a substrate and at least two electrodes. One electrode is a working electrode having at least one conductive pad applied to the substrate and at least one electrically conductive sensor material is applied to the conductive pad that includes at least one detector substance adapted to perform an electrically detectable electrochemical detection reaction with the analyte. Another electrode is a counter electrode having at least one counter electrode conductive pad applied to the substrate. The sensor elements also include at least one electrically insulating material that surrounds at least the counter electrode on all sides, where a height of the electrically insulating material at least equals a height of the counter electrode conductive pad.Type: ApplicationFiled: December 10, 2014Publication date: April 9, 2015Inventors: Sabine Achmann, Holger Kotzan, Ulrich Mueller, Monika Strasser, Herbert Wieder
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Patent number: 8997330Abstract: An implantable sensor is provide which can be used for determining a concentration of at least one analyte in a medium, in particular a body tissue and/or a body fluid. The implantable sensor has a layered construction with at least one insulating carrier substrate and at least two electrodes which are arranged in at least two different layer planes of the implantable sensor and are electrically isolated from one another by the at least one insulating carrier substrate. The electrodes have electrode areas which face the medium when the sensor has been implanted, and are in contact with the medium over a large area and substantially uniformly, directly or via a generally analyte-permeable membrane layer.Type: GrantFiled: October 31, 2012Date of Patent: April 7, 2015Assignee: Roche Diagnostics Operations, Inc.Inventors: Holger Kotzan, Gregor Bainczyk
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Patent number: 8357274Abstract: An electrochemical biosensor analysis system is provided for analyzing a sample liquid, comprising a biosensor having an electrode structure made of at least two electrodes, a test field, covering the electrode structure and capable of absorbing the sample liquid, and a defined sample application surface on the top side of the test field. The system also includes an analysis instrument comprising an evaluation unit for determining the desired analysis data. The analysis instrument comprises an AC resistance measuring device for measuring an AC resistance value between two electrodes of the electrode structure by means of an area compensation measurement. The measured AC resistance value is used, in the determination of the analysis data, as a measure of the partial area of the effective electrode structure area wetted by the sample liquid.Type: GrantFiled: July 22, 2008Date of Patent: January 22, 2013Assignee: Roche Diagnostics Operations, Inc.Inventors: Michael Marquant, Udo Zapf, Gregor Bainczyk, Volker Unkrig, Mihail-Onoriu Lungu, Holger Kotzan
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Patent number: 8326393Abstract: An implantable sensor is provide which can be used for determining a concentration of at least one analyte in a medium, in particular a body tissue and/or a body fluid. The implantable sensor has a layered construction with at least one insulating carrier substrate and at least two electrodes which are arranged in at least two different layer planes of the implantable sensor and are electrically isolated from one another by the at least one insulating carrier substrate. The electrodes have electrode areas which face the medium when the sensor has been implanted, and are in contact with the medium over a large area and substantially uniformly, directly or via a generally analyte-permeable membrane layer.Type: GrantFiled: June 19, 2008Date of Patent: December 4, 2012Assignee: Roche Diagnostics Operations, Inc.Inventors: Holger Kotzan, Gregor Bainczyk
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Patent number: 8137980Abstract: The invention concerns a reagent system for the so-called on-board control of analytical elements, in particular test strips, containing an organic N-oxide or a nitroso compound. The invention also concerns analytical elements containing a reagent system for a detection reaction and a reagent system for an on-board control. Furthermore, the invention concerns a method for checking analytical elements in which a reagent system for an on-board control is examined optically or electrochemically with the aid of a measuring instrument for changes which could indicate a stress of the analytical element.Type: GrantFiled: February 22, 2011Date of Patent: March 20, 2012Assignee: Roche Diagnostics Operations, Inc.Inventors: Volker Unkrig, Christine Nortmeyer, Carina Horn, Michael Marquant, Mihail Onoriu Lungu, Joachim Hoenes, Holger Kotzan, Joerg Dreibholz
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Publication number: 20110177605Abstract: The invention concerns a reagent system for the so-called on-board control of analytical elements, in particular test strips, containing an organic N-oxide or a nitroso compound. The invention also concerns analytical elements containing a reagent system for a detection reaction and a reagent system for an on-board control. Furthermore, the invention concerns a method for checking analytical elements in which a reagent system for an on-board control is examined optically or electrochemically with the aid of a measuring instrument for changes which could indicate a stress of the analytical element.Type: ApplicationFiled: February 22, 2011Publication date: July 21, 2011Applicant: ROCHE DIAGNOSTICS OPERATIONS, INC.Inventors: Volker Unkrig, Christine Nortmeyer, Carina Horn, Michael Marquant, Mihail-Onoriu Lungu, Joachim Hoenes, Holger Kotzan, Joerg Dreibholz
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Patent number: 7914752Abstract: The invention concerns a reagent system for the so-called on-board control of analytical elements, in particular test strips, containing an organic N-oxide or a nitroso compound. The invention also concerns analytical elements containing a reagent system for a detection reaction and a reagent system for an on-board control. Furthermore, the invention concerns a method for checking analytical elements in which a reagent system for an on-board control is examined optically or electrochemically with the aid of a measuring instrument for changes which could indicate a stress of the analytical element.Type: GrantFiled: October 12, 2004Date of Patent: March 29, 2011Assignee: Roche Diagnostics Operations, Inc.Inventors: Volker Unkrig, Christine Nortmeyer, Carina Horn, Michael Marquant, Mihail-Onoriu Lungu, Joachim Hoenes, Holger Kotzan, Joerg Dreibholz
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Publication number: 20090156920Abstract: An implantable sensor is provide which can be used for determining a concentration of at least one analyte in a medium, in particular a body tissue and/or a body fluid. The implantable sensor has a layered construction with at least one insulating carrier substrate and at least two electrodes which are arranged in at least two different layer planes of the implantable sensor and are electrically isolated from one another by the at least one insulating carrier substrate. The electrodes have electrode areas which face the medium when the sensor has been implanted, and are in contact with the medium over a large area and substantially uniformly, directly or via a generally analyte-permeable membrane layer.Type: ApplicationFiled: June 19, 2008Publication date: June 18, 2009Inventors: Holger Kotzan, Gregor Bainczyk
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Publication number: 20090020439Abstract: An electrochemical biosensor analysis system is provided for analyzing a sample liquid, comprising a biosensor having an electrode structure made of at least two electrodes, a test field, covering the electrode structure and capable of absorbing the sample liquid, and a defined sample application surface on the top side of the test field. The system also includes an analysis instrument comprising an evaluation unit for determining the desired analysis data. The analysis instrument comprises an AC resistance measuring device for measuring an AC resistance value between two electrodes of the electrode structure by means of an area compensation measurement. The measured AC resistance value is used, in the determination of the analysis data, as a measure of the partial area of the effective electrode structure area wetted by the sample liquid.Type: ApplicationFiled: July 22, 2008Publication date: January 22, 2009Inventors: Michael Marquant, Udo Zapf, Gregor Bainczyk, Volker Unkrig, Mihail-Onoriu Lungu, Holger Kotzan
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Publication number: 20050123441Abstract: The invention concerns a reagent system for the so-called on-board control of analytical elements, in particular test strips, containing an organic N-oxide or a nitroso compound. The invention also concerns analytical elements containing a reagent system for a detection reaction and a reagent system for an on-board control. Furthermore, the invention concerns a method for checking analytical elements in which a reagent system for an on-board control is examined optically or electrochemically with the aid of a measuring instrument for changes which could indicate a stress of the analytical element.Type: ApplicationFiled: October 12, 2004Publication date: June 9, 2005Inventors: Volker Unkrig, Christine Nortmeyer, Carina Horn, Michael Marquant, Mihail-Onoriu Lungu, Joachim Hoenes, Holger Kotzan, Joerg Dreibholz
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Publication number: 20030146113Abstract: The invention concerns an electrochemical sensor based on dry chemistry for determining blood coagulation or individual coagulation factors which has at least two electrodes on an inert support as well as a dry reagent, characterized in that the reagent contains a protease substrate which is composed of a peptide residue that can be cleaved off by a thrombin and is bound to a phenylenediamine residue via an amide bond at its carboxyl end andType: ApplicationFiled: December 6, 2002Publication date: August 7, 2003Inventors: Volker Unkrig, Michael Marquant, Fritz Hindelang, Holger Kotzan, Carina Horn, Christine Nortmeyer
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Patent number: 5858691Abstract: The invention concerns a method for the simultaneous colorimetric and electrochemical measurement of an analyte using an oxidizing enzyme and a chromogen A that accepts electrons from the enzyme which is characterized in that the chromogen A after reduction to A' reacts by coupling to a substance BX to form a colored substance A'B the concentratin of which is measured colorimetrically as a measure for the presence or amount of the analyte and in that an electrochemically measurable group X.sup.- is cleaved off during the coupling reaction the concentration of which is measured electrochemically as a measure for the amount of the analyte.Type: GrantFiled: June 13, 1996Date of Patent: January 12, 1999Assignee: Boehringer Mannheim GmbHInventors: Joachim Hoenes, Holger Kotzan, Volker Unkrig, Michael Marouant
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Patent number: 5538687Abstract: The invention addresses a measuring cell and a process for carrying out electrochemiluminescence measurements (ECL). The measuring cell has a sample space in which there are disposed a working and a counter electrode. The counter electrode is disposed such that it is located in the light path between the working electrode and the optical detector.Type: GrantFiled: December 16, 1994Date of Patent: July 23, 1996Assignee: Behringer Mannheim GmbHInventors: Holger Kotzan, Mihail-Onoriu Lungu