Patents by Inventor Xiu Cheng

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).

  • Controlled release metformin compositions
    Publication number: 20060008524
    Abstract: A composition for treating patients having non-insulin-dependent diabetes mellitus (NIDDM) by administering a controlled release oral solid dosage form containing preferably a biguanide drug such as metformin, on a once-a-day basis. The dosage form provides a mean time to maximum plasma concentration (Tmax) of the drug which occurs at 5.5 to 7.5 hours after oral administration on a once-a-day basis to human patients. Preferably, the dose of drug is administered at dinnertime to a patient in the fed state.
    Type: Application
    Filed: September 13, 2005
    Publication date: January 12, 2006
    Applicant: Andrx Corporation
    Inventors: Chih-Ming Chen, Xiu-Xiu Cheng, Steve Jan, Joseph Chou
  • Extended release oxybutynin formulation
    Publication number: 20050287185
    Abstract: A controlled release oxybutynin tablet that employs a homogeneous core with less than 50% of a water swellable polymer and a semi-permeable membrane that surrounds the homogeneous core.
    Type: Application
    Filed: July 29, 2004
    Publication date: December 29, 2005
    Inventors: David Wong, Xiu Cheng, Chih-Ming Chen, Steve Jan, Aaron Dely, Dacheng Tian
  • Sustained release neutralized divalproex sodium
    Publication number: 20050276848
    Abstract: The present invention is directed to sustained release oral dosage forms comprising neutralized divalproex sodium, methods of manufacturing the dosage forms, and methods of treatment with the dosage forms.
    Type: Application
    Filed: June 15, 2004
    Publication date: December 15, 2005
    Inventors: Nilobon Podhipleux, Xiu Cheng, Unchalee Lodin, Chih-Ming Chen, Avinash Nangia, Dacheng Tian
  • Controlled release sodium valproate formulation
    Publication number: 20050276850
    Abstract: Disclosed is a controlled release formulation comprising valproic acid, pharmaceutically acceptable salt thereof, amide thereof, or derivative thereof.
    Type: Application
    Filed: June 15, 2004
    Publication date: December 15, 2005
    Inventors: Nilobon Podhipleux, Xiu Cheng, Unchalee Lodin, Chih-Ming Chen, Avinash Nangia, Dacheng Tian
  • Controlled release opioid analgesic formulation
    Publication number: 20050226929
    Abstract: A pharmaceutical sustained release formulation for opioid analgesics which can be administered every 12 hours for control of pain in patients suffering from chronic pain.
    Type: Application
    Filed: April 12, 2004
    Publication date: October 13, 2005
    Inventors: Jianbo Xie, Xiu Cheng, Chih-Ming Chen
  • Dosage form holder device and methods for immersion testing
    Publication number: 20050166688
    Abstract: The present invention comprises a device and methods for dissolution or immersion testing and, in particular, a device and methods that improve the consistency of test results by limiting the ability of pharmaceutical or other dosage forms to move or reorient during testing.
    Type: Application
    Filed: January 30, 2004
    Publication date: August 4, 2005
    Inventors: Dacheng Tian, Xiu Cheng, Jack Cardinal, Boyong Li, Avinash Nangia
  • Pharmaceutical formulations containing a non-steroidal antiinflammatory drug and an antiulcerative drug
    Publication number: 20050163847
    Abstract: Disclosed is a pharmaceutical dosage form including a therapeutically effective amount of an NSAID and an antiulcerative agent.
    Type: Application
    Filed: January 20, 2005
    Publication date: July 28, 2005
    Applicant: Andrx Pharmaceuticals, LLC
    Inventors: Xiu Cheng, Avinash Nangia, Dacheng Tian
  • Controlled release oral dosage form
    Publication number: 20050147678
    Abstract: A once a day bupropion hydrochloride formulation is disclosed.
    Type: Application
    Filed: March 1, 2005
    Publication date: July 7, 2005
    Inventors: Boyong Li, Avinash Nangia, Chih Chen, Xiu Xiu Cheng
  • Stable pharmaceutical compositions without a stabilizer
    Publication number: 20050142195
    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: Application
    Filed: January 3, 2005
    Publication date: June 30, 2005
    Inventors: Boyong Li, Xiu Xiu Cheng
  • Controlled release oral dosage form
    Patent number: 6905708
    Abstract: A once a day bupropion hydrochloride formulation is disclosed
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: June 14, 2005
    Assignee: ANDRX Pharmaceuticals, Inc.
    Inventors: Boyong Li, Avinash Nangia, Chih Ming Chen, Xiu Xiu Cheng
  • Rapidly disintegrating formulation
    Publication number: 20050112196
    Abstract: The invention relates to a rapidly disintegrating oral dosage formulation that contains a water insoluble or slightly water soluble neurological agent and method of preparing the rapidly disintegrating formulation wherein the formulation is designed to dissolve in the buccal cavity of the patient.
    Type: Application
    Filed: October 6, 2004
    Publication date: May 26, 2005
    Inventors: Jianbo Xie, Guohua Zhang, Xiu Cheng, Roger Carter
  • Extended release venlafaxine formulation
    Publication number: 20050106248
    Abstract: A controlled release dosage form of venlafaxine that comprises an immediate release pellet and an extended release pellet.
    Type: Application
    Filed: November 17, 2003
    Publication date: May 19, 2005
    Inventors: Manesh Dixit, Xiu-Xiu Cheng, Avinash Nangia, Chih Chen
  • Stable pharmaceutical compositions without a stabilizer
    Patent number: 6893660
    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: November 21, 2002
    Date of Patent: May 17, 2005
    Assignee: Andrx Pharmaceuticals, Inc.
    Inventors: Boyong Li, Xiu Xiu Cheng
  • Itraconazole immediate release formulation
    Publication number: 20050074494
    Abstract: The present invention relates to active pellets without a specific inert starting seed size and without a seal coat, which may be compressed into a tablet or loaded into a capsule to form an orally administrable dosage formulation for an antifungal agent.
    Type: Application
    Filed: October 6, 2003
    Publication date: April 7, 2005
    Inventors: Xiu-Xiu Cheng, Chih Chen, Steve Jan
  • Controlled release metformin compositions
    Patent number: 6866866
    Abstract: A composition for treating patients having non-insulin-dependent diabetes mellitus (NIDDM) by administering a controlled release oral solid dosage form containing preferably a biguanide drug such as metformin, on a once-a-day basis. The dosage form provides a mean time to maximum plasma concentration (Tmax) of the drug which occurs at 5.5 to 7.5 hours after oral administration on a once-a-day basis to human patients. Preferably, the dose of drug is administered at dinnertime to a patient in the fed state.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: March 15, 2005
    Assignee: Andrx Labs, LLC
    Inventors: Chih-Ming Chen, Xiu-Xiu Cheng, Steve Jan, Joseph Chou
  • Controlled release metformin compositions
    Publication number: 20040219209
    Abstract: A composition for treating patients having non-insulin-dependent diabetes mellitus (NIDDM) by administering a controlled release oral solid dosage form containing preferably a biguanide drug such as metformin, on a once-a-day basis. The dosage form provides a mean time to maximum plasma concentration (Tmax) of the drug which occurs at 5.5 to 7.5 hours after oral administration on a once-a-day basis to human patients. Preferably, the dose of drug is administered at dinnertime to a patient in the fed state.
    Type: Application
    Filed: March 9, 2004
    Publication date: November 4, 2004
    Inventors: Chih-Ming Chen, Xiu-Xiu Cheng, Steve Jan, Joseph Chou
  • Methods for treating diabetes via administration of controlled release metformin
    Patent number: 6790459
    Abstract: A method for treating patients having non-insulin-dependent diabetes mellitus (NIDDM) by administering a controlled release oral solid dosage form containing preferably a biguanide drug such as metformin, on a once-a-day basis. The dosage form provides a mean time to maximum plasma concentration (Tmax) of the drug which occurs at a 5.5 to 7.5 hours after oral administration on a once-a-day basis to human patients. Preferably, the dose of drug is administered at dinnertime to a patient in the fed state.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: September 14, 2004
    Assignee: Andrx Labs, LLC
    Inventors: Xiu Xiu Cheng, Chih-Ming Chen, Steve Jan, Joseph Chou
  • Oral controlled release dosage form
    Publication number: 20040156896
    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: December 2, 2003
    Publication date: August 12, 2004
    Inventors: Manesh Dixit, Chih-Ming Chen, Xiu Xiu Cheng, Jianbo Xie
  • Stable pharmaceutical compositions without a stabilizer
    Publication number: 20040101556
    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: Application
    Filed: November 21, 2002
    Publication date: May 27, 2004
    Inventors: Boyong Li, Xiu Xiu Cheng
  • Biguanide formulations
    Publication number: 20040052848
    Abstract: In certain embodiments, the invention is directed to a pharmaceutical dosage form consisting essentially of a single phase matrix comprising metformin or a pharmaceutically acceptable salt thereof and at least one controlled release excipient; said dosage form providing a mean Tmax of metformin from about 3 to about 12 hours after administration to human patients.
    Type: Application
    Filed: May 20, 2003
    Publication date: March 18, 2004
    Inventors: Xiu-Xiu Cheng, Chih-Ming Chen, Steve Jan, Dacheng Tian