Patents Assigned to DNA Polymerase Technology, Inc.
  • Patent number: 11814655
    Abstract: Provided are mutant polymerases having DNA polymerase activity and reverse transcriptase activity or strand displacement activity, along with target nucleic acid amplification methods employing such mutant polymerases.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: November 14, 2023
    Assignee: DNA POLYMERASE TECHNOLOGY, INC.
    Inventors: Wayne M. Barnes, Milko B. Kermekchiev, Zhian Zhang
  • Patent number: 11091745
    Abstract: Provided are mutant polymerases having DNA polymerase activity and reverse transcriptase activity or strand displacement activity, along with target nucleic acid amplification methods employing such mutant polymerases.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: August 17, 2021
    Assignee: DNA POLYMERASE TECHNOLOGY, INC.
    Inventors: Wayne M. Barnes, Milko B. Kermekchiev, Zhian Zhang
  • Patent number: 10683537
    Abstract: Provided herein are mutant polymerase enzymes resistant to inhibitors encountered in Polymerase Chain Reactions (PCR). Also provided are nucleic acids or constructs encoding isolated polypeptides having polymerase activity. Also provided are kits useful for PCR containing isolated polypeptides having polymerase activity or isolated nucleic acids encoding such.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: June 16, 2020
    Assignee: DNA Polymerase Technology, Inc.
    Inventors: Milko B. Kermekchiev, Zhian Zhang
  • Patent number: 9796965
    Abstract: The present invention generally relates to detection of a target nucleic acid in standard PCR, real-time PCR, RT PCR, and real-time RT PCR. One aspect of the invention provides mutant DNA polymerase enzymes that are resistant to PCR inhibitors, such as dye, blood, and soil. Another aspect of the invention provides for methods of real-time PCR assays using mutant DNA polymerase enzymes resistant to PCR inhibitors with samples containing dye, blood, and/or soil. Another aspect of the invention provides for methods of standard PCR assays using mutant DNA polymerase enzymes resistant to PCR inhibitors with samples containing blood and/or soil.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: October 24, 2017
    Assignee: DNA Polymerase Technology, Inc.
    Inventors: Milko Kermekchiev, Lyubka Kirilova, Zhian Zhang
  • Publication number: 20140113299
    Abstract: Provided herein are mutant polymerase enzymes resistant to inhibitors encountered in Polymerase Chain Reactions (PCR). Also provided are nucleic acids or constructs encoding isolated polypeptides having polymerase activity. Also provided are kits useful for PCR containing isolated polypeptides having polymerase activity or isolated nucleic acids encoding such.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 24, 2014
    Applicant: DNA Polymerase Technology, Inc.
    Inventors: Milko B. Kermekchiev, Zhian Zhang
  • Publication number: 20130252309
    Abstract: An isolated polypeptide having fast elongating polymerase activity. Also provided are kits containing the isolated polypeptide and isolated polynucleotides encoding the isolated polypeptide.
    Type: Application
    Filed: June 1, 2013
    Publication date: September 26, 2013
    Applicant: DNA Polymerase Technology Inc.
    Inventors: Milko B. Kermekchiev, Wayne M. Barnes
  • Patent number: 8470563
    Abstract: A method of obtaining DNA amplification of a nucleic acid target from a volume of whole blood comprising performing DNA amplification in a PCR assay mixture with a blood-resistant polymerase.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: June 25, 2013
    Assignee: DNA Polymerase Technology Inc.
    Inventors: Milko B. Kermekchiev, Wayne Morris Barnes
  • Publication number: 20120028259
    Abstract: The present invention generally relates to amplfication reactions. One aspect of the invention provides amplification reaction enhancer compositions comprising trehalose, carnitine, and a non-ionic detergent, such as NP40. These enhancer compositions can improve efficiency, specificity, and sensitivity of amplification reactions in conventional and real-time PCR and RT-PCR. In addition, these compositions permit nucleic acid amplification directly in crude samples containing blood, blood components, or soil extract with little or no nucleic acid extraction prior to amplification. Another aspect of the invention provides a method of enhancing an amplification reaction containing a crude blood sample with heparin. Another improvement derived from the invention is improved detection of difficult, high GC content nucleic acid targets.
    Type: Application
    Filed: December 4, 2009
    Publication date: February 2, 2012
    Applicant: DNA POLYMERASE TECHNOLOGY INC.
    Inventors: Zhian Zhang, Milko Kermekchiev
  • Publication number: 20110027832
    Abstract: The present invention generally relates to detection of a target nucleic acid in standard PCR, real-time PCR, RT PCR, and real-time RT PCR. One aspect of the invention provides mutant DNA polymerase enzymes that are resistant to PCR inhibitors, such as dye, blood, and soil. Another aspect of the invention provides for methods of real-time PCR assays using mutant DNA polymerase enzymes resistant to PCR inhibitors with samples containing dye, blood, and/or soil. Another aspect of the invention provides for methods of standard PCR assays using mutant DNA polymerase enzymes resistant to PCR inhibitors with samples containing blood and/or soil.
    Type: Application
    Filed: March 16, 2009
    Publication date: February 3, 2011
    Applicant: DNA POLYMERASE TECHNOLOGY INC.
    Inventors: Milko B. Kermekchiev, Lyubka Kirilova, Zhian Zhang
  • Publication number: 20090170060
    Abstract: A method of obtaining DNA amplification of a nucleic acid target from a volume of whole blood comprising performing DNA amplification in a PCR assay mixture with a blood-resistant polymerase.
    Type: Application
    Filed: December 8, 2008
    Publication date: July 2, 2009
    Applicant: DNA POLYMERASE TECHNOLOGY INC.
    Inventors: Milko B. Kermekchiev, Wayne Morris Barnes
  • Patent number: 7393635
    Abstract: The present invention provides methods of linking nucleic acids without the use of restriction enzymes or any joining enzyme such as ligase. More specifically, the present invention provides methods for cloning or rearranging a double-stranded target DNA which is a PCR product into a double-stranded vector DNA which is a PCR product, said DNAs being amplified using primers that contain at least one ribonucleotide, preferably at or near the respective 3? ends of the primers, such that RNA-specific cleavage, preferably by RNAse A, will allow release of the primers to create long matching 3?-sticky ends.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: July 1, 2008
    Assignee: DNA Polymerase Technology, Inc.
    Inventor: Wayne Morris Barnes