Patents by Inventor Zhengong B. Li

Zhengong B. Li 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).

  • Polymyxin Derivates Useful As Antibacterial Agents
    Publication number: 20120316105
    Abstract: The present invention provides a new class of polymyxin derivates useful for treating bacterial infections, especially Gram-negative infections, that have reduced renal cytotoxicity.
    Type: Application
    Filed: June 7, 2012
    Publication date: December 13, 2012
    Inventors: Thomas Victor Magee, Jinshan Michael Chen, Carlos Alberto Martinez, Zhengong B. Li
  • Dihydoxyhexanoic acid derivatives, their intermediates, and methods of making
    Patent number: 6858744
    Abstract: This invention relates to dihydroxyhexanoic acid derivatives and their intermediates, as well as to methods of preparing such compounds. Additionally, present invention relates to removing a protecting group from a protected amine wherein the method comprises reacting the protected amine with phosphoric acid.
    Type: Grant
    Filed: May 7, 2003
    Date of Patent: February 22, 2005
    Assignee: Pfizer Inc.
    Inventors: John C. Kath, Zhengong B. Li, V. John Jasys, Frank J. Urban
  • Dihydro-furan-2-one derivatives, their intermediates and methods of manufacture
    Publication number: 20040087797
    Abstract: This invention relates to dihydro-furan-2-one derivatives, their intermediates and methods of manufacture.
    Type: Application
    Filed: October 16, 2003
    Publication date: May 6, 2004
    Applicant: Pfizer Inc
    Inventor: Zhengong B. Li
  • Crystal forms of quinoxaline-2-carboxylic acid [4-carbamoyl-1-(3-fluorobenzyl)-2,7-dihydroxy-7-methyl-octyl]-amide
    Publication number: 20040072834
    Abstract: This invention relates to crystal forms of quinoxaline-2-carboxylic acid [4-carbamoyl-1-(3-fluorobenzyl)-2,7-dihydroxy-7-methyl-octyl]-amide, useful in treating or preventing a disorder or condition by antagonizing the CCR1 receptor, and to their methods of preparation and use.
    Type: Application
    Filed: August 8, 2003
    Publication date: April 15, 2004
    Applicant: Pfizer Inc.
    Inventors: John C. Kath, Zheng J. Li, Zhengong B. Li, Eric McElroy, Clifford N. Meltz, Christopher S. Poss
  • Novel processes and intermediates for preparing triazolo-pyridines
    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
  • Dihydro-furan-2-one derivatives, their intermediates and methods of manufacture
    Publication number: 20040049057
    Abstract: This invention relates to dihydro-furan-2-one derivatives, their intermediates and methods of manufacture.
    Type: Application
    Filed: May 7, 2003
    Publication date: March 11, 2004
    Applicant: Pfizer Inc.
    Inventors: Frank J. Urban, V. John Jasys, Zhengong B. Li
  • Dihydoxyhexanoic acid derivatives, their intermediates, and methods of making
    Publication number: 20040019217
    Abstract: This invention relates to dihydroxyhexanoic acid derivatives and their intermediates, as well as to methods of preparing such compounds. Additionally, present invention relates to removing a protecting group from a protected amine wherein the method comprises reacting the protected amine with phosphoric acid.
    Type: Application
    Filed: May 7, 2003
    Publication date: January 29, 2004
    Applicant: Pfizer Inc.
    Inventors: John C. Kath, Zhengong B. Li, V. John Jasys, Frank J. Urban