Patents by Inventor Carl T. Wittwer

Carl T. Wittwer 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).

  • Patent number: 6197520
    Abstract: The present invention is directed to a method of analyzing at least two analytes at the same time using at least two fluorescent detecting entities. More particularly, the present invention relates to the use of fluorescently labeled hybridization probes to identify the genotypes of a nucleic acid sample at more than one locus by measuring fluorescence throughout a range of temperatures and correcting for temperature-dependent spectral overlap of the fluorescent probes.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: March 6, 2001
    Assignee: University of Utah Research Foundation
    Inventors: Carl T. Wittwer, Gregory Pritham, Philip Bernard
  • Patent number: 6174670
    Abstract: Methods of monitoring hybridization during polymerase chain reaction are disclosed. These methods are achieved with rapid thermal cycling and use of double stranded DNA dyes or specific hybridization probes. A fluorescence resonance energy transfer pair comprises fluorescein and Cy5 or Cy5.5. Methods for quantitating amplified DNA and determining its purity are carried out by analysis of melting and reannealing curves.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: January 16, 2001
    Assignee: University of Utah Research Foundation
    Inventors: Carl T. Wittwer, Kirk M. Ririe, Randy P. Rasmussen
  • Patent number: 6140054
    Abstract: The present invention is directed to a mutation detection kit and method of analyzing multiple loci of one or more nucleic acid sequences for the presence of mutations or polymorphisms. More particularly, the present invention relates to the use of the polymerase chain reaction (PCR) and fluorescently labeled oligonucleotide hybridization probes to identify mutations and polymorphisms based on melting curve analysis of the hybridization probes.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: October 31, 2000
    Assignee: University of Utah Research Foundation
    Inventors: Carl T. Wittwer, Philip S. Bernard
  • Patent number: 5935522
    Abstract: An apparatus particularly suited for subjecting biological samples to any necessary sample preparation tasks, subjecting the sample to rapid thermal cycling, and then subjecting the sample to subsequent on-line analysis using one or more of a number of analytical techniques. The apparatus includes a chromatography device including an injection means, a chromatography pump, and a chromatography column. In addition, the apparatus also contains a capillary electrophoresis device consisting of a capillary electrophoresis column with an inlet and outlet end, a means of injection, and means of applying a high voltage to cause the differential migration of species of interest through the capillary column.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: August 10, 1999
    Assignee: University of Utah Research Foundation
    Inventors: Harold P. Swerdlow, Carl T. Wittwer
  • Patent number: 5455175
    Abstract: A thermal cycling device having a sample chamber whose temperature can be rapidly and accurately modulated over a range of temperatures needed to carry out a number of biological procedures, such a the DNA polymerase chain reaction. Biological samples are placed in glass microcapillary tubes and then located inside the sample chamber. A programmable controller regulates the temperature of the sample inside the sample chamber. Once a heating cycle is completed, the controller opens a door to the chamber for venting hot air out and cool ambient air is moved in. Temperature versus time profiles corresponding to optimum denaturation, annealing and elongation temperatures for amplification of DNA are achievable by the present invention.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: October 3, 1995
    Assignee: University of Utah Research Foundation
    Inventors: Carl T. Wittwer, David R. Hillyard, Kirk M. Ririe