Patents by Inventor Christian Korfhage

Christian Korfhage 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).

  • Publication number: 20130224799
    Abstract: A method is disclosed for improved isothermal amplification of nucleic acids comprising the step of release of an essential component from a matrix under predetermined conditions. Furthermore, the invention relates to a kit comprising mesophilic enzyme and a matrix with embedded essential components for isothermal amplification. A composition comprising a matrix and a mesophilic enzyme and a method for embedding a mesophilic enzyme are disclosed as well.
    Type: Application
    Filed: August 9, 2011
    Publication date: August 29, 2013
    Applicant: QIAGEN GMBH
    Inventor: Christian Korfhage
  • Publication number: 20130210019
    Abstract: The present invention relates to a method for amplifying a template nucleic acid, wherein the method comprises amplifying said template nucleic acid using the helicase dependent amplification (HDA) reaction in the presence of a nicking endonuclease, and wherein said template nucleic acid comprises a sequence recognized by said nicking endonuclease or a sequence recognized by said nicking endonuclease is introduced into the template nucleic acid during the HDA reaction. The invention further pertains to a kit for amplifying a nucleic acid, comprising a nicking endonuclease, a helicase and a DNA polymerase.
    Type: Application
    Filed: August 16, 2011
    Publication date: August 15, 2013
    Applicant: QIAGEN GMBH
    Inventors: Christian Korfhage, Gerd Grosshauser, Thomas Rothmann, Ralf Himmelreich
  • Patent number: 8486628
    Abstract: The present invention is related to normalized quantification of nucleic acids and to the normalization of quantities of nucleic acids in samples, e.g. mixtures of nucleic acids. The present invention relates to method for the normalization of the quantity of a nucleic acid to be quantified in a sample to the total quantity of nucleic acid in the sample; or to the total quantity of a specific class of nucleic acid in the sample.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: July 16, 2013
    Assignee: Qiagen GmbH
    Inventors: Dirk Loeffert, Christian Korfhage, Holger Engel
  • Patent number: 8465925
    Abstract: The present invention provides methods and compositions for sequence-specific isolation of polynucleotide molecules from nucleic acid populations and subsequent amplification of isolated polynucleotide molecules or fragments thereof.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: June 18, 2013
    Assignees: Generation Biotech, LLC, GenoVision Inc., QIAGEN GmbH
    Inventors: Johannes Dapprich, Nancy Murphy, Christian Korfhage
  • Publication number: 20130065776
    Abstract: The present invention relates to a method for selectively amplifying non-methylated sequences of a DNA comprising the steps of (i) providing a sample comprising a DNA which is methylated at least one site, (ii) treating the DNA in the sample with a methylation-dependent nuclease, and (iii) amplifying the DNA cut using the methylation-dependent nuclease. In addition, the invention relates to kits for use in the method according to the invention. The method according to the invention can be used for selectively preparing to (selectively accumulating) non-methylated sequence segments of genomic DNA and for analysing the global methylation pattern in genomic DNA.
    Type: Application
    Filed: November 23, 2010
    Publication date: March 14, 2013
    Inventors: Chrìstìan Korfhage, Andreas Meier
  • Patent number: 8309303
    Abstract: The invention relates to a method for processing RNA, in particular, a RNA reaction method and kits for carrying out said RNA reaction method.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: November 13, 2012
    Assignee: QIAGEN GmbH
    Inventors: Christian Korfhage, Ralf Peist, Dirk Löffert
  • Publication number: 20120252014
    Abstract: The present invention is related to normalized quantification of nucleic acids and to the normalization of quantities of nucleic acids in samples, e.g. mixtures of nucleic acids. The present invention relates to method for the normalization of the quantity of a nucleic acid to be quantified in a sample to the total quantity of nucleic acid in the sample; or to the total quantity of a specific class of nucleic acid in the sample.
    Type: Application
    Filed: July 30, 2010
    Publication date: October 4, 2012
    Inventors: Dirk Loeffert, Christian Korfhage, Holger Engel
  • Publication number: 20120202198
    Abstract: This invention relates to a process for synthesis of a cDNA in a sample, in an enzymatic reaction, whereby the process comprises the steps: simultaneous preparation of a first enzyme with polyadenylation activity, a second enzyme with reverse transcriptase activity, a buffer, at least one ribonucleotide, at least one deoxyribonucleotide, an anchor oligonucleotide; addition of a sample that comprises a ribonucleic acid; and incubation of the agents of the previous steps in one or more temperature steps, which are selected such that the first enzyme and the second enzyme show activity. The invention further relates to a reaction mixture that comprises a first enzyme with polyadenylation activity, a second enzyme with reverse transcriptase activity, optionally a buffer, optionally at least one ribonucleotide, optionally at least one deoxyribonucleotide, and optionally an anchor oligonucleotide. Moreover, the invention relates to a kit that comprises a corresponding reaction mixture.
    Type: Application
    Filed: August 13, 2007
    Publication date: August 9, 2012
    Inventors: Holger Engel, Subrahmanyam Yerramilli, Martin Kreutz, Dirk Loeffert, Christian Korfhage
  • Publication number: 20120190026
    Abstract: The present invention is related to normalized quantification of RNAs and to the normalization of quantities of RNAs in samples, e.g. mixtures of RNAs. The present invention relates to method for the normalization of the quantity of a RNA to be quantified in a sample to the total quantity of RNA in the sample; or to the total quantity of a specific class of RNA in the sample.
    Type: Application
    Filed: July 30, 2010
    Publication date: July 26, 2012
    Inventors: Dirk Loeffert, Christian Korfhage, Holger Engel
  • Publication number: 20120190027
    Abstract: The present invention is related to normalized quantification of nucleic acids and to the normalization of quantities of nucleic acids in samples, e.g. mixtures of nucleic acids. The present invention relates to method for the normalization of the quantity of a nucleic acid to be quantified in a sample to the total quantity of nucleic acid in the sample; or to the total quantity of a specific class of nucleic acid in the sample.
    Type: Application
    Filed: July 30, 2010
    Publication date: July 26, 2012
    Inventors: Dirk Loeffert, Christian Korfhage, Holger Engel
  • Publication number: 20120129182
    Abstract: What is described is a method for quantitative and qualitative analysis of complex template nucleic acids to be analyzed. The method comprises the co-amplification of a control nucleic acid with the complex template nucleic acid by means of isothermal strand displacement reaction. The method of the invention further comprises the determination of the amount of amplified control nucleic acid as measure for the determination of the quantity and/or quality of the complex template nucleic acid used. The present invention also relates to a kit for carrying out a method of the invention. Furthermore, the use of the method of the invention or the kit of the invention for standardisation of whole-genome, whole-transcriptome and whole-bisulfitome analyses is described.
    Type: Application
    Filed: June 3, 2010
    Publication date: May 24, 2012
    Applicant: QIAGEN STRASSE 1
    Inventors: Christian Korfhage, Evelyn Fisch
  • Patent number: 8076069
    Abstract: The invention generally provides a method for the sample preparation for a subsequent preparation, processing or analysis method of a sample containing an at least one species of nucleic acid and/or one species of protein, whereby the method comprises the following steps: A) providing a sample which contains at least one species of a nucleic acid and/or of a protein, B) contacting the sample with a fluid or solid composition to produce a fluid sample preparation, whereby the composition contains at least a nitrogenous compound, which is selected from the group consisting of a) polyamines, b) amino acids, and oligo- and polypeptides, c) nitrogenous heterocyclic compounds, including homo- oder heteropolymers, which comprise these nitrogenous compounds, d) amines of the type R1R2NR3, whereby R1, R2 and R3 are chosen independently from one another from the group consisting of H, C1-C5-alkyl groups and aryl groups, whereby R1, R2 and R3 are not H simultaneously, e) carboxylic acid amides, f) inorganic ammonium sal
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: December 13, 2011
    Assignee: Qiagen GmbH
    Inventors: Christian Korfhage, Friederike Wilmer, Dirk Löffert, Ralf Himmelreich, Claudia Fritz, Kathleen Rieske
  • Publication number: 20110124050
    Abstract: The present invention relates to a method for synthesizing a cDNA in a sample in an enzymatic reaction, characterized in that the method comprises the steps: simultaneously providing of a first enzyme with polyadenylation activity, a second enzyme with reverse transcriptase activity, a buffer, at least one ribonucleotide, at least one deoxyribonucleotide, an anchor oligonucleotide, adding of a sample comprising a ribonucleic acid and incubating the agents from the preceding steps in one or more temperature steps, which are selected so that the first enzyme and the second enzyme display activity, characterized in that additionally an amplification takes place in the same reaction mixture.
    Type: Application
    Filed: February 13, 2008
    Publication date: May 26, 2011
    Inventors: Holger Engel, Subrahmanyam Yerramilli, Martin Kreutz, Dirk Löffert, Christian Korfhage
  • Publication number: 20110045542
    Abstract: The present invention relates to a reaction mixture for the amplification of nucleic acids, the non-methylated cytosine bases of which have been converted to uracil bases by means of a bisulfition reaction. The invention also discloses methods for amplifying bisulfited nucleic acid and for determining the nucleic acid methylation state, and also kits based on the reaction mixture according to the invention.
    Type: Application
    Filed: February 6, 2009
    Publication date: February 24, 2011
    Inventors: Christian Korfhage, Dirk Loeffert, Ralf Peist, Nicolas Rudinger
  • Publication number: 20100323363
    Abstract: The invention generally provides a method for the sample preparation for a subsequent preparation, processing or analysis method of a sample containing an at least one species of nucleic acid and/or one species of protein, whereby the method comprises the following steps: A) providing a sample which contains at least one species of a nucleic acid and/or of a protein, B) contacting the sample with a fluid or solid composition to produce a fluid sample preparation, whereby the composition contains at least a nitrogenous compound, which is selected from the group consisting of a) polyamines, b) amino acids, and oligo- and polypeptides, c) nitrogenous heterocyclic compounds, including homo- oder heteropolymeres, which comprise these nitrogenous compounds, d) amines of the type R1R2NR3, whereby R1, R2 and R3 are chosen independently from one another from the group consisting of H, C1-C5-alkyl groups and aryl groups, whereby R1, R2 and R3 are not H simultaneously, e) carbonxylic acid amides, f) inorganic ammonium s
    Type: Application
    Filed: August 24, 2010
    Publication date: December 23, 2010
    Applicant: QIAGEN GmbH
    Inventors: Christian KORFHAGE, Friederike Wilmer, Dirk Löffert, Ralf Himmelreich, Claudia Fritz, Kathleen Rieske
  • Patent number: 7838233
    Abstract: The invention generally provides a method for the sample preparation for a subsequent preparation, processing or analysis method of a sample containing an at least one species of nucleic acid and/or one species of protein, whereby the method comprises the following steps: A) providing a sample which contains at least one species of a nucleic acid and/or of a protein, B) contacting the sample with a fluid or solid composition to produce a fluid sample preparation, whereby the composition contains at least a nitrogenous compound, which is selected from the group consisting of a) polyamines, b) amino acids, and oligo- and polypeptides, c) nitrogenous heterocyclic compounds, including homo-older heteropolymeres, which comprise these nitrogenous compounds, d) amines of the type R1R2NR3, whereby R1, R2 and R3 are chosen independently from one another from the group consisting of H, C1-C5-alkyl groups and aryl groups, whereby R1, R2 and R3 are not H simultaneously, e) carboxylic acid amides, f) inorganic ammonium sa
    Type: Grant
    Filed: April 1, 2006
    Date of Patent: November 23, 2010
    Assignee: Qiagen GmbH
    Inventors: Christian Korfhage, Friederike Wilmer, Dirk Löffert, Ralf Himmelreich, Claudia Fritz, Kathleen Rieske
  • Publication number: 20100209912
    Abstract: The invention generally provides a method for the sample preparation for a subsequent preparation, processing or analysis method of a sample containing an at least one species of nucleic acid and/or one species of protein, whereby the method comprises the following steps: A) providing a sample which contains at least one species of a nucleic acid and/or of a protein, B) contacting the sample with a fluid or solid composition to produce a fluid sample preparation, whereby the composition contains at least a nitrogenous compound, which is selected from the group consisting of a) polyamines, b) amino acids, and oligo- and polypeptides, c) nitrogenous heterocyclic compounds, including homo- oder heteropolymers, which comprise these nitrogenous compounds, d) amines of the type R1R2NR3, whereby R1, R2 and R3 are chosen independently from one another from the group consisting of H, C1-C5-alkyl groups and aryl groups, whereby R1, R2 and R3 are not H simultaneously, e) carboxylic acid amides, f) inorganic ammonium sal
    Type: Application
    Filed: June 3, 2009
    Publication date: August 19, 2010
    Applicant: QIAGEN GMBH
    Inventors: Christian KORFHAGE, Friederike WILMER, Dirk LÖFFERT, Ralf HIMMELREICH, Claudia FRITZ, Kathleen RIESKE
  • Publication number: 20100015602
    Abstract: The invention relates to a method for processing RNA, in particular, a RNA reaction method and kits for carrying out said RNA reaction method.
    Type: Application
    Filed: March 27, 2006
    Publication date: January 21, 2010
    Applicant: QIAGEN GMBH
    Inventors: Christian Korfhage, Ralf Peist, Dirk Loffert
  • Publication number: 20090299047
    Abstract: The present invention concerns a method for activating a nucleic acid for a polymerase reaction with the steps: (a) Heating a nucleic acid to a temperature of 55° C. to 80° C., (b) cooling the nucleic acid to a temperature at which a polymerase shows no substantial decrease in activity, and (c) starting the polymerase reaction by the addition of a heat-labile polymerase to the nucleic acid.
    Type: Application
    Filed: September 11, 2006
    Publication date: December 3, 2009
    Applicant: QIAGEN GMBH
    Inventors: Christian Korfhage, Dirk Löffert
  • Publication number: 20090047674
    Abstract: The present invention provides methods and compositions for sequence-specific isolation of polynucleotide molecules from nucleic acid populations and subsequent amplification of isolated polynucleotide molecules or fragments thereof.
    Type: Application
    Filed: April 4, 2008
    Publication date: February 19, 2009
    Applicants: Generation Biotech, LLC, GenoVision Inc., QIAGEN GmbH
    Inventors: Johannes Dapprich, Nancy Murphy, Christian Korfhage