Patents by Inventor Xiu-Xiu Cheng

Xiu-Xiu 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).

  • Oral controlled release dosage form
    Patent number: 9468633
    Abstract: A dosage form that provides a controlled release solid dosage form for the oral administration of a central nervous system stimulant, preferably methylphenidate hydrochloride.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: October 18, 2016
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Manesh Dixit, Chih-Ming Chen, Xiu Xiu Cheng, Jianbo Xie
  • Diltiazem controlled release formulation and method of manufacture
    Patent number: 8778395
    Abstract: A controlled release diltiazem dosage formulation comprising a plurality of diltiazem pellets and a gel-forming material where the time of maximum diltiazem blood plasma levels occurs more than 8 hours after administration and preferably more than 10 hours after administration.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: July 15, 2014
    Assignee: Andrx Labs, LLC
    Inventors: Xiu Xiu Cheng, Xiaohong Qi, Guohua Zhang, Manesh Dixit
  • Controlled release oral dosage form
    Patent number: 8747898
    Abstract: A once a day bupropion salt formulation is disclosed.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: June 10, 2014
    Assignee: Andrx Pharmaceuticals, LLC
    Inventors: Boyong Li, Avinash Nangia, Chih Ming Chen, Xiu Xiu Cheng
  • Extended release venlafaxine formulation
    Patent number: 8668932
    Abstract: A controlled release dosage form of venlafaxine that comprises an immediate release pellet and an extended release pellet.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: March 11, 2014
    Assignee: Andrx Pharmaceuticals, LLC
    Inventors: Manesh Dixit, Xiu-Xiu Cheng, Avinash Nangia, Chin Ming Chen
  • Controlled release oral dosage form
    Patent number: 8545880
    Abstract: A once a day bupropion hydrochloride formulation is disclosed.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: October 1, 2013
    Assignee: Andrx Pharmaceuticals, LLC
    Inventors: Boyong Li, Avinash Nangia, Chih Ming Chen, Xiu Xiu Cheng
  • Stable pharmaceutical compositions without a stabilizer
    Patent number: 8501227
    Abstract: Stabilized controlled release pharmaceutical preparations are disclosed in which active ingredient degradation is prevented without the use of a stabilizer. The active ingredient is sealed away from excipients that can adversely affect stability by sealing the excipients rather than the active ingredient. The preparations are substantially unaffected by exposure to storage conditions of elevated temperature and/or elevated relative humidity.
    Type: Grant
    Filed: January 3, 2005
    Date of Patent: August 6, 2013
    Assignee: Andrx Pharmaceuticals, LLC
    Inventors: Boyong Li, Xiu Xiu Cheng
  • Controlled release metformin formulations
    Patent number: 8475841
    Abstract: Sustained release pharmaceutical formulations comprising an antihyperglycemic drug or a pharmaceutically acceptable salt thereof are disclosed. The formulations provide therapeutic plasma levels of the antihyperglycemic drug to a human patient over a 24 hour period after administration.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: July 2, 2013
    Assignee: Andrx Labs, LLC
    Inventors: Xiu Xiu Cheng, Steve Jan, Joseph Chou, Chih-Ming Chen
  • ORAL CONTROLLED RELEASE DOSAGE FORM
    Publication number: 20130022678
    Abstract: A dosage form that provides a controlled release solid dosage form for the oral administration of a central nervous system stimulant, preferably methylphenidate hydrochloride.
    Type: Application
    Filed: August 20, 2012
    Publication date: January 24, 2013
    Applicant: ANDRX PHARMACEUTICALS, INC.
    Inventors: Manesh Dixit, Chih-Ming Chen, Xiu Xiu Cheng, Jianbo Xie
  • Oral controlled release formulation for sedative and hypnotic agents
    Patent number: 8309104
    Abstract: The present invention relates to a novel controlled release dosage form that releases therapeutic amounts of a sedative or hypnotic agent rapidly after administration and maintains therapeutic levels for about eight hours after administration.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: November 13, 2012
    Assignee: Watson Pharmaceuticals, Inc.
    Inventors: Xiu Xiu Cheng, Dacheng Tian
  • Oral controlled release dosage form
    Patent number: 8252327
    Abstract: A dosage form that provides a controlled release solid dosage form for the oral administration of a central nervous system stimulant, preferably methylphenidate hydrochloride.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: August 28, 2012
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Manesh Dixit, Chih-Ming Chen, Xiu-Xiu Cheng, Jianbo Xie
  • ORAL CONTROLLED RELEASE DOSAGE FORM
    Publication number: 20110268799
    Abstract: A dosage form that provides a controlled release solid dosage form for the oral administration of a central nervous system stimulant, preferably methylphenidate hydrochloride.
    Type: Application
    Filed: July 11, 2011
    Publication date: November 3, 2011
    Applicant: ANDRX PHARMACEUTICALS, INC.
    Inventors: Manesh Dixit, Chih-Ming Chen, Xiu-Xiu Cheng, Jianbo Xie
  • CONTROLLED RELEASE METFORMIN FORMULATIONS
    Publication number: 20110195119
    Abstract: Sustained release pharmaceutical formulations comprising an antihyperglycemic drug or a pharmaceutically acceptable salt thereof are disclosed. The formulations provide therapeutic plasma levels of the antihyperglycemic drug to a human patient over a 24 hour period after administration.
    Type: Application
    Filed: March 21, 2011
    Publication date: August 11, 2011
    Applicant: ANDRX LABS, LLC
    Inventors: Xiu Xiu Cheng, Chih-Ming Chen, Steve Jan, Joseph Chou
  • Oral controlled release dosage form
    Patent number: 7988993
    Abstract: A dosage form that provides a controlled release solid dosage form for the oral administration of a central nervous system stimulant, preferably methylphenidate hydrochloride.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: August 2, 2011
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Manesh Dixit, Chih-Ming Chen, Xiu Xiu Cheng, Jianbo Xie
  • EXTENDED RELEASE VENLAFAXINE FORMULATION
    Publication number: 20110165234
    Abstract: A controlled release dosage form of venlafaxine that comprises an immediate release pellet and an extended release pellet.
    Type: Application
    Filed: March 18, 2011
    Publication date: July 7, 2011
    Applicant: ANDRX PHARMACEUTICALS, LLC
    Inventors: Manesh Dixit, Xiu-Xiu Cheng, Avinash Nangia, Chin Ming Chen
  • Extended release venlafaxine formulation
    Patent number: 7931915
    Abstract: A controlled release dosage form of venlafaxine that comprises an immediate release pellet and an extended release pellet.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: April 26, 2011
    Assignee: Andrx Pharmaceuticals, LLC
    Inventors: Manesh Dixit, Xiu-Xiu Cheng, Avinash Nangia, Chih Ming Chen
  • Controlled release metformin formulations
    Patent number: 7919116
    Abstract: Sustained release pharmaceutical formulations comprising an antihyperglycemic drug or a pharmaceutically acceptable salt thereof are disclosed. The formulations provide therapeutic plasma levels of the antihyperglycemic drug to a human patient over a 24 hour period after administration.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: April 5, 2011
    Assignee: Andrx Labs, LLC
    Inventors: Chih-Ming Chen, Xiu Xiu Cheng, Steve Jan, Joseph Chou
  • Controlled Release Oral Dosage Form
    Publication number: 20100278926
    Abstract: A once a day bupropion salt formulation is disclosed.
    Type: Application
    Filed: July 14, 2010
    Publication date: November 4, 2010
    Inventors: Boyong Li, Avinash Nangia, Chih Ming Chen, Xiu Xiu Cheng
  • Controlled release oral dosage form
    Patent number: 7771750
    Abstract: A once a day bupropion hydrochloride formulation is disclosed.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: August 10, 2010
    Assignee: Andrx Pharmaceuticals, LLC
    Inventors: Boyong Li, Avinash Nangia, Chih Ming Chen, Xiu Xiu Cheng
  • Controlled release sodium valproate formulation
    Patent number: 7713550
    Abstract: Disclosed is a controlled release formulation comprising valproic acid, pharmaceutically acceptable salt thereof, amide thereof, or derivative thereof.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: May 11, 2010
    Assignee: Andrx Corporation
    Inventors: Nilobon Podhipleux, Xiu Xiu Cheng, Unchalee Lodin, Chih-Ming Chen, Avinash Nangia, Dacheng Tian
  • Oral Controlled Release Formulation for Sedatives and Hypnotic Agents
    Publication number: 20090123535
    Abstract: The present invention relates to a novel controlled release dosage form that releases therapeutic amounts of a sedative or hypnotic agent rapidly after administration and maintains therapeutic levels for about eight hours after administration.
    Type: Application
    Filed: December 4, 2008
    Publication date: May 14, 2009
    Inventors: Xiu Xiu Cheng, Dacheng Tian