Patents by Inventor Dirk Loeffert

Dirk Loeffert 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: 20230405057
    Abstract: The invention also relates to a microbial strain selected from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp for use as a medicament, (i) a cellular extract from a strain selected from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp for use in treating inflammatory bowel disease, (ii) the supernatant from the cell culture from a strain selected from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp for use in treating inflammatory bowel disease or, (iii) a medically active molecule or a medically active substance obtained from a strain selected from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp for use in treating inflammatory bowel disease.
    Type: Application
    Filed: October 28, 2020
    Publication date: December 21, 2023
    Inventors: Aleksander Dajkovic, Dirk Loeffert
  • Publication number: 20230340557
    Abstract: The present invention uses microfluidics droplets for studying the growth dynamics of communities of bacteria in the presence of various perturbations such as various chemicals or other microorganisms and to establish microbial assemblies model which is representative of a microbiota of interest and to examine their growth dynamics after perturbations such as with an array of chemicals or other microorganisms. In particular, the present invention refers to a method and apparatus for assessing the effect of a chemical or biological substance on the growth of microorganisms.
    Type: Application
    Filed: July 12, 2021
    Publication date: October 26, 2023
    Inventors: Aleksander Dajkovic, Guansheng Du, Dirk Loeffert
  • Publication number: 20230227920
    Abstract: In a first aspect, the present invention relates to a method of producing a library of microorganisms, the method comprising the steps of: a. providing a first fluid comprising at least one single cell, b. dispersing said first fluid comprising at least one single cell in a second fluid, thereby obtaining a plurality of single-layer microfluidic droplets, wherein at least one single- layer microfluidic droplet comprises at least one single cell, wherein the second fluid is immiscible with the first fluid, c. optionally, adding to said at least one single-layer microfluidic droplet a third fluid comprising a sensing compound, wherein the third fluid is miscible with said first fluid, and wherein the third fluid is immiscible with said second fluid, d. injecting said at least one single-layer microfluidic droplet optionally comprising the sensing compound into a fourth fluid, wherein said fourth fluid is immiscible with said second fluid, thereby obtaining at least one double-layer microfluidic droplet, e.
    Type: Application
    Filed: June 14, 2021
    Publication date: July 20, 2023
    Inventors: Guansheng Du, Laurine Thomas, Aleksander Dajkovic, Dirk Loeffert
  • Publication number: 20220409686
    Abstract: The invention relates to a pharmaceutical composition comprising (i) a live strain from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp, (ii) an attenuated strain from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp or, (iii) a medically active substance isolated from a strain from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp.
    Type: Application
    Filed: October 28, 2020
    Publication date: December 29, 2022
    Inventors: Aleksander Dajkovic, Dirk Loeffert
  • Publication number: 20220370515
    Abstract: The invention relates to a pharmaceutical composition comprising (i) a live strain from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp, (ii) an attenuated strain from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp or, (iii) a medically active substance isolated from a strain from the genus of Kazachstania spp, Acetobacter spp. and/or Stenotrophomonas spp. These may be used to treat pancreatic cancer.
    Type: Application
    Filed: October 28, 2020
    Publication date: November 24, 2022
    Inventors: Dirk Loeffert, Aleksander Dajkovic
  • Patent number: 11448645
    Abstract: Cultivation and/or test-system comprising at least two cultivation spaces combined in a microparticle, wherein the sperically shaped microparticle comprises, (i) a first cultivation space in the center core of said spherically shaped microparticle, (ii) a second cultivation space in the wall surrounding the core of said microparticle, (iii) wherein the wall surrounding the core allows for the exchange of molecules as, salts, nutrients, peptides, chemicals and other compounds in order for the cells in the first cultivation space to interact with the cells in second cultivation space and vice versa. In the test system, the cells are co-cultivated and the microparticles are then selected based on the phenotype of the cells in the first or second cultivation space.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: September 20, 2022
    Assignee: Biomillenia SAS
    Inventors: Dirk Loeffert, Aleksander Dajkovic, Thomas Duboys
  • Patent number: 10648031
    Abstract: The present invention is directed to novel methods and kits to be employed for preparing adapter-ligated amplicons or a sequencing library of a target DNA, respectively.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: May 12, 2020
    Assignee: QIAGEN GmbH
    Inventors: Nan Fang, Dirk Loeffert
  • Publication number: 20200003770
    Abstract: Cultivation and/or test-system comprising at least two cultivation spaces combined in a microparticle, wherein the sperically shaped microparticle comprises, (i) a first cultivation space in the center core of said spherically shaped microparticle, (ii) a second cultivation space in the wall surrounding the core of said microparticle, (iii) wherein the wall surrounding the core allows for the exchange of molecules as, salts, nutrients, peptides, chemicals and other compounds in order for the cells in the first cultivation space to interact with the cells in second cultivation space and vice versa. In the test system, the cells are co-cultivated and the microparticles are then selected based on the phenotype of the cells in the first or second cultivation space.
    Type: Application
    Filed: March 2, 2018
    Publication date: January 2, 2020
    Inventors: Dirk Loeffert, Aleksander Dajkovic, Thomas Duboys
  • Publication number: 20190316165
    Abstract: A method for the analysis of microorganisms, which produce a compound, the method comprising: a. providing a microorganism which produces a compound of interest and a detector microorganism which comprises a reporter gene or reporter gene operon, wherein the microorganism producing said compound of interest and the detector microorganism are combined into single droplets, wherein each droplet comprises at least one cell of each strain; b. subjecting the droplets to a microfluidic system; c. analyzing the droplets for the activation of the reporter gene of the detector strain; d. sorting and collecting the droplets comprising the detector microorganism with expressed reporter gene.
    Type: Application
    Filed: November 9, 2017
    Publication date: October 17, 2019
    Inventors: Dirk Loeffert, Eric Shiue, Guansheng Du
  • Publication number: 20190194718
    Abstract: The present invention is directed to novel methods, kits and uses to be employed for the generation of tagged DNA fragments of a target DNA and nucleic acid molecules associated therewith
    Type: Application
    Filed: December 11, 2014
    Publication date: June 27, 2019
    Inventors: Ioanna Andreou, Nan Fang, Dirk Loeffert, Annika Piotrowski
  • Patent number: 10323273
    Abstract: The present invention relates to methods and uses where a combination of (i) an enzyme exhibiting 5??3? exonuclease activity and specifically degrading 5?-phosphorylated strands of double-stranded nucleic acids is used, and (ii) one or more primer pair(s), each primer being 5? phosphorylated, in a method comprising at least a first and a second amplification reaction of a first and a second template, respectively, for preventing contamination of the second amplification reaction with amplification products of the first amplification reaction, as well as novel methods and kits using the combination. Also, the present invention relates to kits comprising the enzyme and either 5?-phosphorylated primers or a polynucleotide kinase.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: June 18, 2019
    Assignee: Qiagen GmbH
    Inventors: Nan Fang, Dirk Loeffert, Christine Runde
  • Patent number: 10087482
    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: Grant
    Filed: February 6, 2009
    Date of Patent: October 2, 2018
    Assignee: QIAGEN GMBH
    Inventors: Christian Korfhage, Dirk Loeffert, Ralf Peist, Nicolas Rudinger
  • Publication number: 20180057876
    Abstract: The present invention is directed to novel methods and kits to be employed for preparing adapter-ligated amplicons or a sequencing library of a target DNA, respectively.
    Type: Application
    Filed: November 9, 2017
    Publication date: March 1, 2018
    Inventors: Nan Fang, Dirk Loeffert
  • Publication number: 20170283869
    Abstract: The present invention is directed to novel methods and kits to be employed for preparing adapter-ligated amplicons or a sequencing library of a target DNA, respectively.
    Type: Application
    Filed: August 21, 2015
    Publication date: October 5, 2017
    Inventors: Nan Fang, Dirk Loeffert
  • Patent number: 9611506
    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: Grant
    Filed: November 12, 2015
    Date of Patent: April 4, 2017
    Assignee: QIAGEN, GMBH
    Inventors: Holger Engel, Subrahmanyam Yerramilli, Martin Kreutz, Dirk Loeffert, Christian Korfhage
  • Publication number: 20170029880
    Abstract: The present invention relates to methods and uses where a combination of (i) an enzyme exhibiting 5?->3? exonuclease activity and specifically degrading 5?-phosphorylated strands of double-stranded nucleic acids is used, and (ii) one or more primer pair(s), each primer being 5? phosphorylated, in a method comprising at least a first and a second amplification reaction of a first and a second template, respectively, for preventing contamination of the second amplification reaction with amplification products of the first amplification reaction, as well as novel methods and kits using the combination. Also, the present invention relates to kits comprising the enzyme and either 5?-phosphorylated primers or a polynucleotide kinase.
    Type: Application
    Filed: May 28, 2015
    Publication date: February 2, 2017
    Inventors: Nan FANG, Dirk LOEFFERT, Christine RUNDE
  • Publication number: 20160355870
    Abstract: The invention is directed to novel methods, kits and uses to be employed for the generation of ligation-ready DNA amplicons of a target DNA by using 5?-phosphorylated primers.
    Type: Application
    Filed: October 13, 2014
    Publication date: December 8, 2016
    Applicant: QIAGEN GMBH
    Inventors: Nan Fang, Dirk Loeffert
  • Publication number: 20160130634
    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: November 12, 2015
    Publication date: May 12, 2016
    Inventors: Holger ENGEL, Subrahmanyam Yerramilli, Martin Kreutz, Dirk Loeffert, Christian Korfhage
  • Patent number: 9238809
    Abstract: The present disclosure relates to methods for isolating, amplifying, and/or analyzing nucleic acids in the presence of an anion exchange material by performing the isolation, amplification and/or analysis step in the presence of at least one anionic compound.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: January 19, 2016
    Assignees: QIAGEN GAITHERSBURG, INC., QIAGEN GMBH
    Inventors: Yuri Khripin, Dirk Loeffert, Roland Fabis, Nadine Krueger
  • Patent number: 9217173
    Abstract: This invention relates to a process for synthesis of a cDNA in a sample, in an enzymatic reaction, wherein 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: Grant
    Filed: August 13, 2007
    Date of Patent: December 22, 2015
    Assignee: QIAGEN GMBH
    Inventors: Holger Engel, Subrahmanyam Yerramilli, Martin Kreutz, Dirk Loeffert, Christian Korfhage