Patents by Inventor Yong Tao

Yong Tao 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: 6949652
    Abstract: The present invention relates to novel crystalline forms of 3-isopropyl-6-[4-(2,5-difluoro-phenyl)-oxazol-5-yl]-[1,2,4]triazolo-[4,3-a]pyridine to pharmaceutical compositions containing such crystal forms and to methods of treatment. 3-Isopropyl-6-[4-(2,5-difluoro-phenyl)-oxazol-5-yl]-[1,2,4]triazolo-[4,3-a]pyridine is a potent inhibitor of MAP kinases, preferably p38 kinase (MAPK14/CSBP/RK kinase). 3-Isopropyl-6-[4-(2,5-difluoro-phenyl)-oxazol-5-yl]-[1,2,4]triazolo-[4,3-a]pyridine is useful in the treatment of inflammation, osteoarthritis, rheumatoid arthritis, cancer, reperfusion or ischemia in stroke or heart attack, autoimmune diseases and other disorders.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: September 27, 2005
    Assignee: Pfizer, Inc.
    Inventors: Ming Kang, Zheng Jane Li, Zhengong Bryan Li, Yong Tao
  • Patent number: 6919460
    Abstract: The present invention provides processes useful in the preparation of certain ?3-adrenergic receptor agonists of the structural formula the pharmaceutically acceptable salts thereof, and the hydrates of said pharmaceutically acceptable salts, wherein HET is as described herein. The invention further provides intermediates useful in the preparation of such agonists, and processes useful in the production of such intermediates.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: July 19, 2005
    Assignee: Pfizer Inc,
    Inventors: Robert J. Chambers, Robert W. Dugger, Ming Kang, Yong Tao, John W. Wong
  • Publication number: 20050138691
    Abstract: This invention relates to an isolated nucleic acid fragment encoding an auxin transport protein. The invention also relates to the construction of a chimeric gene encoding all or a substantial portion of the auxin transport protein, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the auxin transport protein in a transformed host cell. The present invention also relates to methods using the auxin transport protein in modulating root development, and in discovering compounds with potential herbicidal activity.
    Type: Application
    Filed: November 12, 2004
    Publication date: June 23, 2005
    Inventors: Emil Orozco, Zude Weng, Wesley Bruce, Rebecca Cahoon, Yong Tao
  • Publication number: 20040171114
    Abstract: The genes encoding ryanodine receptor homologs have been characterized from multiple insect families including lepidopteran tobacco budworm (Heliothis virescens), homopteran green peach aphid (Myzus persicae), corn plant hopper (Peregrinus maidis), cotton melon aphid (Aphis gossypii) and fruitfly (Drosophila melanogaster). The full-length genes have been isolated, cloned and amplified in bacterial cells. Expression in insect cells shows that the recombinant protein folds into a functional calcium release channel.
    Type: Application
    Filed: September 23, 2003
    Publication date: September 2, 2004
    Inventors: Steven Gutteridge, Timothy Caspar, Daniel Cordova, James J. Rauh, Yong Tao, Lihong Wu, Rejane M. Smith
  • Publication number: 20040143119
    Abstract: The present invention relates to novel crystalline forms of 3-isopropyl-6-[4-(2,5-difluoro-phenyl)-oxazol-5-yl]-[1,2,4]triazolo-[4,3-a]pyridine to pharmaceutical compositions containing such crystal forms and to methods of treatment. 3-Isopropyl-6-[4-(2,5-difluoro-phenyl)-oxazol-5-yl]-[1,2,4]triazolo-[4,3-a]pyridine is a potent inhibitor of MAP kinases, preferably p38 kinase (MAPK14/CSBP/RK kinase). 3-Isopropyl-6-[4-(2,5-difluoro-phenyl)-oxazol-5-yl]-[1,2,4]triazolo-[4,3-a]pyridine is useful in the treatment of inflammation, osteoarthritis, rheumatoid arthritis, cancer, reperfusion or ischemia in stroke or heart attack, autoimmune diseases and other disorders.
    Type: Application
    Filed: August 27, 2003
    Publication date: July 22, 2004
    Applicant: Pfizer Inc
    Inventors: Ming Kang, Zheng Jane Li, Zhengong Bryan Li, Yong Tao
  • Publication number: 20040077871
    Abstract: The present invention provides processes useful in the preparation of certain &bgr;3-adrenergic receptor agonists of the structural formula 1
    Type: Application
    Filed: October 9, 2003
    Publication date: April 22, 2004
    Applicant: Pfizer Inc
    Inventors: Robert J. Chambers, Robert W. Dugger, Ming Kang, Yong Tao, John W. Wong
  • Publication number: 20040053959
    Abstract: The present invention relates and intermediates to a novel process for preparing triazolo-pyridines of the formula I 1
    Type: Application
    Filed: August 27, 2003
    Publication date: March 18, 2004
    Applicant: Pfizer Inc.
    Inventors: Richard A. Buzon, Michael J. Castaldi, Zhengong B. Li, David H. B. Ripin, Yong Tao
  • Patent number: 6689888
    Abstract: The present invention provides processes useful in the preparation of certain &bgr;3-adrenergic receptor agonists of the structural formula the pharmaceutically acceptable salts thereof, and the hydrates of said pharmaceutically acceptable salts, wherein HET is as described herein. The invention further provides intermediates useful in the preparation of such agonists, and processes useful in the production of such intermediates.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: February 10, 2004
    Assignee: Pfizer Inc.
    Inventors: Robert J. Chambers, Robert W. Dugger, Ming Kang, Yong Tao, John W. Wong
  • Publication number: 20030199046
    Abstract: The present invention provides processes useful in the preparation of certain &bgr;3-adrenergic receptor agonists of the structural formula 1
    Type: Application
    Filed: February 20, 2003
    Publication date: October 23, 2003
    Inventors: Robert J. Chambers, Robert W. Dugger, Ming Kang, Yong Tao, John W. Wong
  • Publication number: 20030180787
    Abstract: This invention relates to an isolated nucleic acid fragment encoding an isopentenyl diphosphate biosynthetic enzyme. The invention also relates to the construction of a chimeric gene encoding all or a portion of the isopentenyl diphosphate biosynthetic enzyme, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the isopentenyl diphosphate biosynthetic enzyme in a transformed host cell.
    Type: Application
    Filed: April 30, 2003
    Publication date: September 25, 2003
    Inventors: Rebecca E. Cahoon, Yong Tao, Mark E. Williams, Sean J. Coughlan, Zude Weng
  • Publication number: 20030110533
    Abstract: This invention relates to an isolated nucleic acid fragment encoding an acetyl-CoA carboxylase BCCP subunit. The invention also relates to the construction of a recombinant DNA construct encoding all or a portion of the acetyl-CoA carboxylase BCCP subunits, in sense or antisense orientation, wherein expression of the recombinant DNA construct results in production of altered levels of the acetyl-CoA carboxylase BCCP subunits in a transformed host cell.
    Type: Application
    Filed: July 3, 2002
    Publication date: June 12, 2003
    Inventors: Rebecca E. Cahoon, Leslie T. Harvell, Anthony J. Kinney, Yong Tao
  • Patent number: 6558915
    Abstract: This invention relates to an isolated nucleic acid fragment encoding an isopentenyl diphosphate biosynthetic enzyme. The invention also relates to the construction of a chimeric gene encoding all or a portion of the isopentenyl diphosphate biosynthetic enzyme, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the isopentenyl diphosphate biosynthetic enzyme in a transformed host cell.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: May 6, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Yong Tao
  • Patent number: 6506929
    Abstract: A process is disclosed for the preparation of simvastatin which enables highly regio selective C-methylation of the 2′-position group of lovastatin without requiring protection/deprotection of 13-OH of lovastatin and lactone ring opening/closure.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: January 14, 2003
    Assignee: Apotex Inc.
    Inventors: Khashayar Karimian, Tim Fat Tam, Yong Tao, Yiwei Li, Gary Doucette
  • Patent number: 6482631
    Abstract: This invention related to an isolated nucleic acid fragment encoding a tryptophan biosynthetic enzyme. This invention also related to the construction of a Chimeric gene encoding all or a portion of the tryptophan biosynthetic enzyme, in sense or antisense orientation, wherein expression of the Chimeric gene results in the production of altered levels of the tryptophan biosynthetic enzyme in a transformed host cell. The tryptophan biosynthetic enzymes include anthranilate phosphoribosyltransferase (E.C. 2.4.2.18) from corn (Zea mays), soybean (Glycine max) and wheat (Triticum aestivum); indole-3-glycerol phosphate synthase (E.C. 4.1.1.48) from corn (Zea mays), rice (Oryza sativa), soybean (Glycine max), and wheat (Triticum aestivum); and phosphoribosylanthranilate isomerase (E.C. 5.3.1.24) from corn (Zea mays), rice (Oryza sativa), (and wheat (Triticum aestivum).
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: November 19, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William D. Hitz, Carl A. Maxwell, Yong Tao
  • Patent number: 6204383
    Abstract: Sildenafil, a known pharmaceutical chemical useful in treatment of male sexual dysfunction, is prepared by processes in which the final chemical intermediate is of significantly lower basicity than sildenafil itself, so that sildenafil can be extracted in substantially pure form from the organic reaction mixture in which it is made by adding an aqueous medium of appropriately chosen acidic pH and causing phase shift of the sildenafil to occur selectively into the aqueous phase.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: March 20, 2001
    Assignee: Torcan Chemical Ltd.
    Inventors: Yee-Fung Lu, Casimir Antczak, Jan Oudenes, Yong Tao
  • Patent number: 6046332
    Abstract: The present invention relates to a process for the preparation of a [2-[4-[4-(chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]acetic acid derivative of formula I: and, in particular, for the preparation of cetirizine. The method comprises the oxidation of a primary alcohol of a hydroxyzine. Cetirizine is a non-sedating type histamine H1-receptor antagonist and is used in the treatment of allergic syndromes.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: April 4, 2000
    Inventors: Yong Tao, Khashayar Karimian, Tim Fat Tam
  • Patent number: 5908959
    Abstract: A process is provided for the preparation of 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid or salts thereof which comprises of:a) reacting 4-aminobutyric acid with phosphorous acid and phosphorus trichloride in the presence of a polyalkylene(glycol); andb) recovering said 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid or salts thereof.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: June 1, 1999
    Assignee: Apotex Inc.
    Inventors: Rudolf Kubela, Yong Tao