Patents by Inventor Pengyi Zhang

Pengyi Zhang 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).

  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines
    Patent number: 7507822
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: March 24, 2009
    Assignee: Schering Corporation
    Inventors: Shen-Chun Kuo, Loc Thanh Tran, Pengyi Zhang
  • PROCESS FOR PREPARING SUBSTITUTED 5-AMINO-PYRAZOLO-[4,3-e]-1,2,4-TRIAZOLO[1,5-c]PYRIMIDINES
    Publication number: 20090005559
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed, wherein the pyrimidine ring is cyclized using a cyanating agent.
    Type: Application
    Filed: September 11, 2008
    Publication date: January 1, 2009
    Inventors: Shen-Chun Kuo, David Jieh-Shyh Tsai, Loc Thanh Tran, Pengyi Zhang, Andrew D. Jones
  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines
    Patent number: 7439361
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed, wherein the pyrimidine ring is cyclized using a cyanating agent.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: October 21, 2008
    Assignee: Schering Corporation
    Inventors: Shen-Chun Kuo, David Jieh-Shyh Tsai, Loc Thanh Tran, Pengyi Zhang, Andrew D. Jones
  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines
    Publication number: 20070238874
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed.
    Type: Application
    Filed: May 17, 2007
    Publication date: October 11, 2007
    Inventors: Shen-Chun Kuo, Loc Tran, Pengyi Zhang
  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines
    Publication number: 20070203340
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed, wherein the pyrimidine ring is cyclized using a cyanating agent.
    Type: Application
    Filed: April 20, 2007
    Publication date: August 30, 2007
    Inventors: Shen-Chun Kuo, David Jieh-Shyh Tsai, Loc Thanh Tran, Pengyi Zhang, Andrew Jones
  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines
    Patent number: 7235659
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: June 26, 2007
    Assignee: Schering Corporation
    Inventors: Shen-Chun Kuo, Loc Thanh Tran, Pengyi Zhang
  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo-[1,5-c]-pyrimidines
    Patent number: 7223861
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed, wherein the pyrimidine ring is cyclized using a cyanating agent.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: May 29, 2007
    Assignee: Schering Corporation
    Inventors: Shen-Chun Kuo, David Jieh-Shyh Tsai, Loc Thanh Tran, Pengyi Zhang, Andrew D. Jones
  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines
    Publication number: 20060149060
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed.
    Type: Application
    Filed: November 29, 2004
    Publication date: July 6, 2006
    Inventors: Shen-Chun Kuo, Loc Tran, Pengyi Zhang
  • Process for preparing substituted 5-amino-pyrazolo-[4,3-e]-1,2,4-triazolo-[1,5-c]-pyrimidine
    Publication number: 20050090492
    Abstract: A process for preparing substituted 5-amino-pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidine compounds having an aminoalkyl substituent at the 7-position is disclosed, wherein the pyrimidine ring is cyclized using a cyanating agent.
    Type: Application
    Filed: October 26, 2004
    Publication date: April 28, 2005
    Inventors: Shen-Chun Kuo, David Tsai, Loc Tran, Pengyi Zhang, Andrew Jones