Patents by Inventor Rong-Kun Chang

Rong-Kun Chang 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).

  • Publication number: 20040219213
    Abstract: A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2) there is a protective layer between the pharmaceutically active amphetamine salt and the enteric release coating and/or (3) there is a protective layer over the enteric release coating. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.
    Type: Application
    Filed: January 16, 2004
    Publication date: November 4, 2004
    Inventors: Beth A. Burnside, Xiaodi Guo, Kimberly Fiske, Richard A. Couch, Donald J. Treacy, Rong-Kun Chang, Charlotte M. McGuinness, Edward M. Rudnic
  • Patent number: 6811794
    Abstract: A pharmaceutical composition comprising at least one pharmaceutically active agent that is pH dependent, at least one non-pH dependent sustained release agent, and at least one pH dependent agent that increases the dissolution rate of the at least one pharmaceutically active agent at a pH in excess of 5.5. Such compositions have minimized pH-dependent dissolution profiles or pH-independent dissolution profiles.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: November 2, 2004
    Assignee: Shire Laboratories, Inc.
    Inventors: Beth A. Burnside, Rong-Kun Chang, Xiaodi Guo
  • Publication number: 20040202693
    Abstract: Disclosed are controlled release dosage forms of pharmaceutical or nutritional agents that are intended for retention in a buccal or sublingual location for administration. The dosage forms are particularly useful for the sustained release administration of drugs that have a limited window of absorption in the gastrointestinal tract and that are minimally, if at all, absorbed mucosally.
    Type: Application
    Filed: April 13, 2004
    Publication date: October 14, 2004
    Inventor: Rong-Kun Chang
  • Patent number: 6793934
    Abstract: A pharmaceutical composition comprising a solid carrier containing a liquid selected from the group consisting of a liquid active agent, a liquid enhancer, or a combination thereof.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: September 21, 2004
    Assignee: Shire Laboratories, Inc.
    Inventors: Beth A. Burnside, Henry Flanner, Xiaodi Guo, Rong Kun Chang
  • Publication number: 20040167203
    Abstract: Disclosed are new compounds that increase the absorption of pharmaceutical agents across mucous membranes. These absorption enhancers allow higher bioavailability of administered drugs. The enhancers advantageously have low or no cytotoxicity.
    Type: Application
    Filed: January 22, 2004
    Publication date: August 26, 2004
    Inventors: Rong-Kun Chang, Benjamin Kibalo, Richard A. Couch, Mark J. Ginski, Ali Keshavarz-Shokri, Caren C. Bancroft
  • Publication number: 20040157797
    Abstract: The present invention is directed to pharmaceutical compositions containing crystalline methylated cyclodextrins, which enhance the solubility of the pharmaceutically active agent or agents of the formulation.
    Type: Application
    Filed: February 2, 2004
    Publication date: August 12, 2004
    Inventor: Rong-Kun Chang
  • Publication number: 20040142035
    Abstract: Disclosed are pharmaceutical compositions, particularly oral dosage forms, which comprise two or more enteric coating materials, either as a coating or as part of a matrix dosage form, and methods of making and using the same. The compositions are characterized by having a sustained release profile at lower pH and an accelerated dissolution profile at higher pH.
    Type: Application
    Filed: January 5, 2004
    Publication date: July 22, 2004
    Inventors: Rong-Kun Chang, Niraj Shah
  • Publication number: 20040062800
    Abstract: A pharmaceutical composition comprising at least one pharmaceutically active agent that is pH dependent, at least one non-pH dependent sustained release agent, and at least one pH dependent agent that increases the dissolution rate of the at least one pharmaceutically active agent at a pH in excess of 5.5. Such compositions have minimized pH-dependent dissolution profiles or pH-independent dissolution profiles.
    Type: Application
    Filed: October 21, 2003
    Publication date: April 1, 2004
    Inventors: Beth A. Burnside, Rong-Kun Chang, Xiaodi Guo
  • Publication number: 20040059002
    Abstract: A pharmaceutical composition comprises a once-a-day sustained release formulation of at least one amphetamine salt which provides mean plasma concentration profile aspects in human ADHD patients which are substantially the same as that provided by ADDERALL XR® type pulsatile formulations.
    Type: Application
    Filed: January 29, 2003
    Publication date: March 25, 2004
    Applicant: SHIRE LABORATORIES, INC.
    Inventors: Richard A. Couch, Beth Burnside, Rong-Kun Chang
  • Publication number: 20030158261
    Abstract: A pharmaceutical composition comprising at least one pharmaceutically active agent that is pH dependent, at least one non-pH dependent sustained release agent, and at least one pH dependent agent that increases the dissolution rate of the at least one pharmaceutically active agent at a pH in excess of 5.5. Such compositions have minimized pH-dependent dissolution profiles or pH-independent dissolution profiles.
    Type: Application
    Filed: December 20, 2001
    Publication date: August 21, 2003
    Inventors: Beth A. Burnside, Rong-Kun Chang, Xiaodi Guo
  • Patent number: 6605300
    Abstract: A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2) there is a protective layer between the pharmaceutically active amphetamine salt and the enteric release coating and/or (3) there is a protective layer over the enteric release coating. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: August 12, 2003
    Assignee: Shire Laboratories, Inc.
    Inventors: Beth A. Burnside, Xiaodi Guo, Kimberly Fiske, Richard A. Couch, Donald J. Treacy, Rong-Kun Chang, Charlotte M. McGuinness, Edward M. Rudnic
  • Publication number: 20030124188
    Abstract: A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2) there is a protective layer between the pharmaceutically active amphetamine salt and the enteric release coating and/or (3) there is a protective layer over the enteric release coating. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.
    Type: Application
    Filed: June 14, 2002
    Publication date: July 3, 2003
    Inventors: Beth A. Burnside, Xiaodi Guo, Kimberly Fiske, Richard A. Couch, Donald J. Treacy, Rong-Kun Chang, Charlotte M. McGuinness, Edward M. Rudnic
  • Publication number: 20030096761
    Abstract: A pharmaceutical composition comprising an inhibitor of angiotensin converting enzyme and neutral endopeptidase, such as sampatrilat, and at least one bioavailability enhancer such as an organic acid, e.g., ascorbic acid. Such a composition has improved systemic bioavailability.
    Type: Application
    Filed: April 30, 2002
    Publication date: May 22, 2003
    Applicant: Shire BioChem Inc.
    Inventors: Beth Burnside, Rong-Kun Chang, Amir Shojaei
  • Publication number: 20030065040
    Abstract: A pharmaceutical composition comprising a dispersion in which an inhibitor of angiotensin converting enzyme and neutral endopeptidase, such as sampatrilat, is dispersed in a lipoidic vehicle. Such a composition has improved systemic bioavailability.
    Type: Application
    Filed: February 1, 2002
    Publication date: April 3, 2003
    Inventors: Amir H. Shojaei, Rong-Kun Chang, Beth A. Burnside
  • Patent number: 6384020
    Abstract: A pharmaceutical composition comprising lactitol and one or more amphetamine salts in a rapid release formulation.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: May 7, 2002
    Assignee: Shire Laboratories, Inc.
    Inventors: Henry H. Flanner, Rong-Kun Chang, Jill E. Pinkett, Sandra E. Wassink, Lisa R. White
  • Publication number: 20010055613
    Abstract: A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2) there is a protective layer between the pharmaceutically active amphetamine salt and the enteric release coating and/or (3) there is a protective layer over the enteric release coating. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.
    Type: Application
    Filed: October 21, 1998
    Publication date: December 27, 2001
    Inventors: BETH A. BURNSIDE, XIAODI GUO, KIMBERLY FISKE, RICHARD A. COUCH, RONG-KUN CHANG, DONALD J. TREACY, CHARLOTTE M. MCGUINNESS, EDWARD M. RUDNIC
  • Patent number: 6322819
    Abstract: A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2) there is a protective layer between the pharmaceutically active amphetamine salt and the enteric release coating and/or (3) there is a protective layer over the enteric release coating. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: November 27, 2001
    Assignee: Shire Laboratories, Inc.
    Inventors: Beth A. Burnside, Xiaodi Guo, Kimberly Fiske, Richard A. Couch, Donald J. Treacy, Rong-Kun Chang, Charlotte McGuinness, Edward M. Rudnic
  • Patent number: 6287599
    Abstract: A pharmaceutical composition comprising at least one pharmaceutically active agent that is pH dependent, at least one non-pH dependent sustained release agent, and at least one pH dependent agent that increases the dissolution rate of the at least one pharmaceutically active agent at a pH in excess of 5.5. Such compositions have minimized pH-dependent dissolution profiles or pH-independent dissolution profiles.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: September 11, 2001
    Assignee: Shire Laboratories, Inc.
    Inventors: Beth A. Burnside, Rong-Kun Chang, Xiaodi Guo