Patents by Inventor Qingzhong Cheng

Qingzhong Cheng 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).

  • METHOD OF PREPARATION OF ANTIVIRAL COMPOUNDS AND USEFUL INTERMEDIATES THEREOF
    Publication number: 20170114087
    Abstract: The invention is directed to processes for synthesizing bicyclic nucleoside antiviral compounds and for synthesizing the intermediates used in the process. The invention is also directed to novel intermediate compounds useful in the process. The antiviral compounds are useful in the treatment of herpes zoster (i.e., varicella zoster virus, VZV, shingles) and for the prevention of post herpetic neuralgia (PHN) resulting from this viral infection.
    Type: Application
    Filed: January 5, 2017
    Publication date: April 27, 2017
    Inventors: Yanling Wang, Yuan Wang, Xungui He, Chuanjun Liu, Jirang Zhu, Jie Li, Qingzhong Cheng, Mingyong Yuan
  • Method of preparation of antiviral compounds and useful intermediates thereof
    Patent number: 9573971
    Abstract: The invention is directed to processes for synthesizing bicyclic nucleoside antiviral compounds and for synthesizing the intermediates used in the process. The invention is also directed to novel intermediate compounds useful in the process. The antiviral compounds are useful in the treatment of herpes zoster (i.e., varicella zoster virus, VZV, shingles) and for the prevention of post herpetic neuralgia (PHN) resulting from this viral infection.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: February 21, 2017
    Assignee: ContraVir Pharmaceuticals, Inc.
    Inventors: Yanling Wang, Yuan Wang, Xungui He, Chuanjun Liu, Jirang Zhu, Jie Li, Qingzhong Cheng, Mingyong Yuan
  • METHOD OF PREPARATION OF ANTIVIRAL COMPOUNDS AND USEFUL INTERMEDIATES THEREOF
    Publication number: 20160122381
    Abstract: The invention is directed to processes for synthesizing bicyclic nucleoside antiviral compounds and for synthesizing the intermediates used in the process. The invention is also directed to novel intermediate compounds useful in the process. The antiviral compounds are useful in the treatment of herpes zoster (i.e., varicella zoster virus, VZV, shingles) and for the prevention of post herpetic neuralgia (PHN) resulting from this viral infection.
    Type: Application
    Filed: January 8, 2016
    Publication date: May 5, 2016
    Inventors: Yanling Wang, Yuan Wang, Xungui He, Chuanjun Liu, Jirang Zhu, Jie Li, Qingzhong Cheng, Mingyong Yuan
  • Method of preparation of antiviral compounds and useful intermediates thereof
    Patent number: 9260469
    Abstract: The invention is directed to processes for synthesizing bicyclic nucleoside antiviral compounds and for synthesizing the intermediates used in the process. The invention is also directed to novel intermediate compounds useful in the process. The antiviral compounds are useful in the treatment of herpes zoster (i.e., varicella zoster virus, VZV, shingles) and for the prevention of post herpetic neuralgia (PHN) resulting from this viral infection.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: February 16, 2016
    Assignee: ContraVir Pharmaceuticals, Inc.
    Inventors: Yanling Wang, Yuan Wang, Xungui He, Chuanjun Liu, Jirang Zhu, Jie Li, Qingzhong Cheng, Mingyong Yuan
  • Method of Preparation of Antiviral Compounds and Useful Intermediates Thereof
    Publication number: 20130331561
    Abstract: The invention is directed to processes for synthesizing bicyclic nucleoside antiviral compounds and for synthesizing the intermediates used in the process. The invention is also directed to novel intermediate compounds useful in the process. The anti-viral compounds are useful in the treatment of herpes zoster (i.e., varicella zoster virus, VZV, shingles) and for the prevention of post herpetic neuralgia (PHN) resulting from this viral infection.
    Type: Application
    Filed: October 7, 2011
    Publication date: December 12, 2013
    Applicant: SYNERGY PHARMACEUTICALS INC.
    Inventors: Yanling Wang, Yuan Wang, Xungui He, Chuanjun Liu, Jirang Zhu, Jie Li, Qingzhong Cheng, Mingyong Yuan