Patents by Inventor Johnny Dale Callahan

Johnny Dale Callahan 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: 7052878
    Abstract: Five fluorogenic probe hydrolysis reverse transcriptase-polymerase chain reaction (RT-PCR) (TaqMan™) assays are described for serotype-specific detection of dengue 1–4 and group-specific detection of dengue viruses. Type- and group-specific oligonucleotide primers and fluorogenic probes were designed against conserved regions of the dengue genome. The invention provides TaqMan PCR assays, which are rapid, sensitive, and specific screening and serotyping tools for the epidemiological study of dengue infections.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: May 30, 2006
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Johnny Dale Callahan, Joseph John Temenak
  • Patent number: 6855521
    Abstract: Five fluorogenic probe hydrolysis reverse transcriptase-polymerase chain reaction (RT-PCR) (TaqMan™) assays are described for serotype-specific detection of dengue 1-4 and group-specific detection of dengue viruses. Type- and group-specific oligonucleotide primers and fluorogenic probes were designed against conserved regions of the dengue genome. The invention provides TaqMan PCR assays, which are rapid, sensitive, and specific screening and serotyping tools for the epidemiological study of dengue infections.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: February 15, 2005
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Johnny Dale Callahan, Joseph John Temenak
  • Publication number: 20040126387
    Abstract: Five fluorogenic probe hydrolysis reverse transcriptase-polymerase chain reaction (RT-PCR) (TaqMan™) assays are described for serotype-specific detection of dengue 1-4 and group-specific detection of dengue viruses. Type- and group-specific oligonucleotide primers and fluorogenic probes were designed against conserved regions of the dengue genome. The invention provides TaqMan PCR assays, which are rapid, sensitive, and specific screening and serotyping tools for the epidemiological study of dengue infections.
    Type: Application
    Filed: December 1, 2000
    Publication date: July 1, 2004
    Inventors: Johnny Dale Callahan, Joseph John Temenak
  • Publication number: 20030149259
    Abstract: The invention relates to diagnostic methods, probes, detection systems and kits for the identification of foot and mouth disease virus (FMDV) infection in a biological sample obtained from a farm animal. It was discovered that a highly conserved region of sequence existed with the 3D coding region of the FMDV genome. This region was found to be strikingly similar, and often identical or with only one or two nucleotide substitution, between the various serotypes of FMDV. Thus, by performing PCR analysis with probes comprising sequences form this region or ELISA with antibodies directed to polypeptide products expressed from this region, a plurality of serotypes of FMDV could be detected from a single test. Further, by including dried PCR reagents plus trehelose, kits could be stored at room temperatures for long periods of time without any significant loss in sensitivity or specificity.
    Type: Application
    Filed: May 20, 2002
    Publication date: August 7, 2003
    Inventors: Johnny Dale Callahan, William Max Nelson, Beverly L. Mangold