Patents by Inventor Colin H. Williams

Colin H. Williams 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: 20090017462
    Abstract: This disclosure describe three related novel methods for Recombinase-Polymerase Amplification (RPA) of a target DNA that exploit the properties of recombinase and related proteins, to invade double-stranded DNA with single stranded homologous DNA permitting sequence specific priming of DNA polymerase reactions. The disclosed methods have the advantage of not requiring thermocycling or thermophilic enzymes. Further, the improved processivity of the disclosed methods may allow amplification of DNA up to hundreds of megabases in length.
    Type: Application
    Filed: May 7, 2008
    Publication date: January 15, 2009
    Applicant: ASM Scientific, Inc.
    Inventors: Olaf Piepenburg, Colin H. Williams, Niall A. Armes, Derek L. Stemple
  • Publication number: 20080293045
    Abstract: This disclosure describes related novel methods for Recombinase-Polymerase Amplification (RPA) of a target DNA that exploit the properties of recombinase and related proteins, to invade double-stranded DNA with single stranded homologous DNA permitting sequence specific priming of DNA polymerase reactions. The disclosed methods have the advantage of not requiring thermocycling or thermophilic enzymes, thus offering easy and affordable implementation and portability relative to other amplification methods. Further disclosed are conditions to enable real-time monitoring of RPA reactions, methods to regulate RPA reactions using light and otherwise, methods to determine the nature of amplified species without a need for gel electrophoresis, methods to improve and optimize signal to noise ratios in RPA reactions, methods to optimize oligonucleotide primer function, methods to control carryover contamination, and methods to employ sequence-specific third ‘specificity’ probes.
    Type: Application
    Filed: April 11, 2005
    Publication date: November 27, 2008
    Inventors: Olaf Piepenburg, Colin H. Williams, Niall A. Armes, Derek L. Stemple
  • Patent number: 7435561
    Abstract: This disclosure provides for methods and reagents for rapid multiplex RPA reactions and improved methods for detection of multiplex RPA reaction products. In addition, the disclosure provides new methods for eliminating carryover contamination between RPA processes.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: October 14, 2008
    Assignee: ASM Scientific, Inc.
    Inventors: Olaf Piepenburg, Colin H. Williams, Niall A. Armes
  • Patent number: 7399590
    Abstract: This disclosure describe three related novel methods for Recombinase-Polymerase Amplification (RPA) of a target DNA that exploit the properties of recombinase and related proteins, to invade double-stranded DNA with single stranded homologous DNA permitting sequence specific priming of DNA polymerase reactions. The disclosed methods have the advantage of not requiring thermocycling or thermophilic enzymes. Further, the improved processivity of the disclosed methods may allow amplification of DNA up to hundreds of megabases in length.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: July 15, 2008
    Assignee: ASM Scientific, Inc.
    Inventors: Olaf Piepenburg, Colin H. Williams, Niall A. Armes, Derek L. Stemple