Patents Represented by Attorney David J. Chang
  • Patent number: 8222003
    Abstract: This invention provides compositions and methods for HCV typing, e.g., genotyping and/or subtyping. The compositions and methods of the invention can be used to assign an HCV isolate to one of at least five HCV genotypes (for example, selected from genotypes 1, 2, 3, 4, 5 or 6), or assign an HCV isolate to one of at least six subtypes (for example, selected from subtypes 1a/b/c, 2a/c, 2b, 3a, 4a, 5a or 6a), where the methods of the invention use only a single typing probe to make the HCV type assignment.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: July 17, 2012
    Assignee: Roche Molecular Systems, Inc.
    Inventors: Amar P Gupta, Stephen Gordon Will
  • Patent number: 8219326
    Abstract: Numerical determinations of the first derivatives of a melt curve data set are made. A baseline is determined for the first derivative values and the baseline is subtracted from the first derivative values to produce modified first derivative values. A first maximum value of the modified first derivative values is determined and said first maximum value represents a melting temperature Tm of a DNA sample. A model function, such as a Gaussian Mixture Model (GMM) function, with parameters determined using a Levenberg-Marquardt (LM) regression process can also be used to find an approximation to the first derivative curve. The maximum values of the numerically determined first derivative values are used as initial conditions for parameters of the model function. The determined parameters provide one or more fractional melting temperature values, which can be returned, for example, displayed or otherwise used for further processing.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: July 10, 2012
    Assignee: Roche Molecular Systems, Inc.
    Inventor: Ronald T. Kurnik
  • Patent number: 8163487
    Abstract: The present invention provides methods of extending primer nucleic acids and sequencing target nucleic acids. The methods include the use of 2?-terminator nucleotides to effect chain termination. In addition to related reaction mixtures and kits, the invention also provides computers and computer readable media.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: April 24, 2012
    Assignee: Roche Molecular Systems, Inc.
    Inventors: David Harrow Gelfand, Fred Lawrence Reichert, Veeraiah Bodepudi, Amar Gupta, Stephen Will, Thomas W. Myers
  • Patent number: 8163484
    Abstract: The present invention relates to methods and reagents for modifying the emission of light from labeled nucleic acids for the purpose of real time detection, analysis, and quantitation of nucleic acid sequences, e.g., using singly labeled probes. These methods and reagents exploit advantageous properties of thiazine dyes and diazine dyes. Furthermore, the use of these light emission modifiers in background reduction, nucleic acid duplex stabilization and other uses is also described. Related kits, reaction mixtures and integrated systems are described.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: April 24, 2012
    Assignee: Roche Molecular Systems, Inc.
    Inventors: Amar P. Gupta, Stephen G. Will
  • Patent number: 8119346
    Abstract: The present invention relates to methods and reagents for modifying the emission of light from labeled nucleic acids for the purpose of real time detection, analysis, and quantitation of nucleic acid sequences, e.g., using singly labeled probes. These methods and reagents exploit advantageous properties of thiazine dyes and diazine dyes. Furthermore, the use of these light emission modifiers in background reduction, nucleic acid duplex stabilization and other uses is also described. Related kits, reaction mixtures and integrated systems are described.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: February 21, 2012
    Assignee: Roche Molecular Systems, Inc.
    Inventors: Amar P. Gupta, Stephen G. Will
  • Patent number: 8114595
    Abstract: The present invention relates to methods and reagents for modifying the emission of light from labeled nucleic acids for the purpose of real time detection, analysis, and quantitation of nucleic acid sequences, e.g., using singly labeled probes. These methods and reagents exploit advantageous properties of thiazine dyes and diazine dyes. Furthermore, the use of these light emission modifiers in background reduction, nucleic acid duplex stabilization and other uses is also described. Related kits, reaction mixtures and integrated systems are described.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: February 14, 2012
    Assignee: Roche Molecular Systems, Inc.
    Inventors: Amar P. Gupta, Stephen Gordon Will
  • Patent number: 8067208
    Abstract: This invention provides compositions and methods for HCV typing, e.g., genotyping and/or subtyping. The compositions and methods of the invention can be used to assign an HCV isolate to one of at least five HCV types (for example, selected from types 1, 2, 3, 4, 5 or 6), or to one of at least five subtypes (for example, subtypes 1a/b/c, 2a/c, 2b, 3a, 4a, 5a or 6a). These methods integrate the hybridization data from a plurality of HCV typing probes in a multidimensional analysis to make an HCV type assignment for an HCV in an experimental sample. The invention also provides related compositions, including, for example, the HCV typing probes and HCV typing diagnostic kits.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: November 29, 2011
    Assignee: Roche Molecular Systems, Inc.
    Inventors: Amar P. Gupta, Stephen Gordon Will
  • Patent number: 7851156
    Abstract: The present invention provides for methods of assaying the activity of a polymerase enzyme by using a Scintillation Proximity Assay (SPA) without the need of primers modified with affinity tags. The methods of the present invention can be practiced with any number of RNA and DNA polymerase enzymes.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: December 14, 2010
    Assignee: Roche Palo Alto LLC
    Inventor: Qing-Fen Gan
  • Patent number: 7807409
    Abstract: A method for the recombinant production of a heterologous polypeptide in a eukaryotic host cell is described. The host cell comprises an expression plasmid, whereby the expression plasmid comprises in a 5? to 3? direction a) a promoter, b) a nucleic acid encoding a first polypeptide, whose amino acid sequence is selected from Table 1 depending on the first two amino acids of the second polypeptide, c) a nucleic acid encoding a second polypeptide comprising a nucleic acid encoding a heterologous polypeptide, a nucleic acid encoding a linker, and a nucleic acid encoding an immunoglobulin fragment, and d) a 3? untranslated region comprising a polyadenylation signal. Further a plasmid and a kit are described.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: October 5, 2010
    Assignee: Roche Palo Alto LLC
    Inventor: Erhard Kopetzki
  • Patent number: 7803562
    Abstract: A novel human sodium phosphate cotransporter expressed on the apical surface of intestinal epithelial cells (huNpt2B) and polypeptides related thereto, as well as nucleic acid compositions encoding the same, are provided. The subject polypeptides and nucleic acid compositions find use in a variety of applications, including research, diagnostic, and therapeutic agent screening applications. Also provided are methods of inhibiting Npt2B activity in a host and methods of treating disease conditions associated with Npt2B activity.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: September 28, 2010
    Assignee: Roche Palo Alto LLC
    Inventors: Paul David Cannon, Suryanarayana Sankuratri
  • Patent number: 7745152
    Abstract: Methods and reagents for determining the genotoxicity of a compound based on genomic responses to contact therewith are provided.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: June 29, 2010
    Assignee: Roche Palo Alto LLC
    Inventors: John David Allard, Dee Aud, Guochun Liao, Gary Allen Peltz
  • Patent number: 7713954
    Abstract: Methods and pharmaceutical compositions relating to selective antagonists of the 5-HT6 receptor and 5-HT2A receptor useful for the treatment of cognitive disorders are presented.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: May 11, 2010
    Assignee: Roche Palo Alto LLC
    Inventors: Douglas William Bonhaus, Renee Sharon Martin
  • Patent number: 7674600
    Abstract: The present invention relates to assays that can measure the activity of enzymes that catalyze phosphate modifications, such as kinases, phosphatases, cyclases and phosphodiesterases. The assays can also be used to identify and screen for substances that modulate the activity of kinases, phosphatases, cyclases and phosphodiesterases.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: March 9, 2010
    Assignee: Roche Palo Alto LLC
    Inventor: Qing-Fen Gan
  • Patent number: 7531529
    Abstract: The present invention relates to imidazole derivatives of formula I wherein R1, R2, R3 and R4 are described hereinabove. These compounds can be used in the treatment or prevention of mGluR5 receptor mediated disorders. These compounds are useful, inter alia, in the treatment of genitourinary diseases.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: May 12, 2009
    Assignee: Roche Palo Alto LLC
    Inventors: Bernd Buettelmann, Simona Maria Ceccarelli, Georg Jaeschke, Sabine Kolczewski, Richard Hugh Philip Porter, Eric Vieira, Anthony P. D. W. Ford, Yu Zhong
  • Patent number: 7504217
    Abstract: Methods and reagents for determining a nucleotide variation at position 937 of the HCV-1a NS5A gene useful in predicting an individual's response to interferon treatment are presented.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: March 17, 2009
    Assignee: Roche Palo Alto LLC
    Inventors: Karina Anna Orle, Andrew Michael Ackrill, Morris Paterson
  • Patent number: 7368530
    Abstract: A novel human sodium phosphate cotransporter expressed on the apical surface of intestinal epithelial cells (huNpt2B) and polypeptides related thereto, as well as nucleic acid compositions encoding the same, are provided. The subject polypeptides and nucleic acid compositions find use in a variety of applications, including research, diagnostic, and therapeutic agent screening applications. Also provided are methods of inhibiting Npt2B activity in a host and methods of treating disease conditions associated with Npt2B activity.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: May 6, 2008
    Assignee: Roche Palo Alto LLC
    Inventors: Paul David Cannon, Suryanarayana Sankuratri
  • Patent number: 7348322
    Abstract: The present invention relates to compounds of formula I: wherein A, X, R1, R2 and R3 are as defined herein and pharmaceutically acceptable salts thereof. The invention also relates to methods of using the compounds of formula I and pharmaceutical compositions comprising the compounds of formula I.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: March 25, 2008
    Assignee: Roche Palo Alto LLC
    Inventors: Leyi Gong, Counde O'Yang, Yun-chou Tan
  • Patent number: 7141365
    Abstract: Methods and compositions for modulating mucin secretion by respiratory system cells are provided. In the subject methods, an effective amount of an hCLCA2 (or homolog thereof) modulatory agent is contacted with the cell to modulate mucin secretion, e.g., decrease or increase mucin secretion, by the cell. The subject methods find use in a variety of different applications, including the treatment of disease conditions associated with respiratory system mucin secretion, e.g., mucin hyper- or hyposecretion. Also provided are methods of screening for respiratory system mucin secretion modulatory agents. Finally, mCLCA4 and non-human homologs thereof, as well as nucleic acid compositions encoding the same, are provided.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: November 28, 2006
    Assignee: Syntex (U.S.A.) LLC
    Inventor: David Edmund Szymkowski
  • Patent number: 7122325
    Abstract: The present invention relates to a voltage-gated sodium channel present in peripheral nerve tissue that is tetrodotoxin-resistant. One aspect of the present invention is purified and isolated DNA encoding this sodium channel. Another aspect of the present invention is the recombinant protein expressed by this DNA, expression vectors comprising the DNA sequence, and host cells transformed with these expression vectors. Another aspect of this invention is the use of this voltage-gated, tetrodotoxin-resistant sodium channel as a therapeutic target for compounds to treat disorders of the peripheral nervous system.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: October 17, 2006
    Assignee: Syntex (U.S.A.) LLC
    Inventors: Ronald Herman, Stephen Gregory Delgado, Linda Marie Fish, Lakshmi Sangameswaran, Douglas Kenneth Rabert