Patents by Inventor Li-Lan H. Chen

Li-Lan H. Chen 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).

  • Patent number: 7138135
    Abstract: Bioadhesive, closed-cell foam film, sustained release, delivery devices for administering an active agent or combination of active agents to a subject are provided. Methods for making such delivery devices and methods for using such delivery devices offering the controlled and sustained release of an active agent or combination of active agents to a subject, preferably a near zero-order release, are also provided.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: November 21, 2006
    Assignee: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, Li Tao, Alfred Liang, Xu Zheng
  • Patent number: 7125564
    Abstract: The products and methods of the present invention provide a means for increasing the solubility and bioavailability of active agents. More particularly the invention provides compositions containing active agents as water-soluble complexes with glycyrrhizin, and methods of preparing such complexes. The invention further provides methods for the preparation of highly water soluble complex dosage forms.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: October 24, 2006
    Assignee: Lavipharm Laboratories, Inc.
    Inventors: Li-Lan H. Chen, Li Tao, Alfred Liang
  • Publication number: 20040234578
    Abstract: Bioadhesive, closed-cell foam film, sustained release, delivery devices for administering an active agent or combination of active agents to a subject are provided. Methods for making such delivery devices and to methods for using such delivery devices offering the controlled and sustained release of an active agent or combination of active agents to a subject, preferably a near zero-order release, are also provided.
    Type: Application
    Filed: June 24, 2004
    Publication date: November 25, 2004
    Inventors: Li-Lan H. Chen, Li Tao, Alfred Liang, Xu Zheng
  • Patent number: 6756051
    Abstract: Bioadhesive, closed-cell foam film, sustained release, delivery devices for administering an active agent or combination of active agents to a subject are provided. Methods for making such delivery devices and to methods for using such delivery devices offering the controlled and sustained release of an active agent or combination of active agents to a subject, preferably a near zero-order release, are also provided.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: June 29, 2004
    Inventors: Li-Lan H. Chen, Li Tao, Alfred Liang, Xu Zheng
  • Publication number: 20040013731
    Abstract: Oral drug complex microparticles containing: a pharmaceutical active having a nitrogen moiety and an anionic methacrylic acid copolymer; wherein the oral drug complex micropaticles resist dissolution or dissociation upon exposure to saliva, but which rapidly dissociate in gastric acid and which rapidly dissolve in intestinal fluid. Oral drug delivery devices containing said oral drug complex microparticles are provided. Processes for producing said oral drug complex microparticles and methods for treating patients including administering said oral drug delivery devices thereto are also provided.
    Type: Application
    Filed: April 8, 2003
    Publication date: January 22, 2004
    Applicant: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, Alfred Liang, Xu Zheng
  • Publication number: 20030219479
    Abstract: Drug delivery devices for administering an active agent or a combination of active agents to a subject are provided.
    Type: Application
    Filed: April 8, 2003
    Publication date: November 27, 2003
    Applicant: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, Alfred Liang
  • Publication number: 20030118653
    Abstract: Quick dissolving oral mucosal drug delivery devices having a mucosal surface-coat-forming inner layer disposed between two moisture barrier coating layers for administering an active agent or combination of active agents to a subject are provided. Methods for making such quick dissolving oral mucosal drug delivery devices and to methods for using such quick dissolving oral mucosal drug delivery devices offering the measured and controlled release of an active agent or combination of active agents to a subject are also provided.
    Type: Application
    Filed: June 10, 2002
    Publication date: June 26, 2003
    Applicant: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, Alfred Liang, Xu Zheng, Hsueh-Ling Wu
  • Patent number: 6552024
    Abstract: Mucosal surface-coat-forming film dosage units containing a water-soluble hydrocolloid, an effective dose of an active agent and a mucosal adhesion enhancer; wherein the active agent is encapsulated within a polymer which is chemically or physically distinct from the hydocolloid; wherein the mucosal adhesion enhancer is a starch graft copolymer; wherein the film exhibits a dry tack value of less than 3.5 g, a wet tack of greater than 35 g, a gelation temperature that is greater than 70° C. for a 2% polymer solution, a dry film thickness of less than 20 mil, a water content of 0.5 to 10%, a tensile strength greater than 1500 psi, a modulus in the range of 35,000 to 300,000 psi, a % elongation of less than 20%, a tear probagation resistance of 0.001 to 1 N, and a dissolution time in the range of 1 to 600 seconds upon application to an oral mucosal surface.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: April 22, 2003
    Assignee: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, William R. Pfister, Donald W. Renn, Thitiwan Buranachokpaisan, James Osborne, Hock Seng Tan, Li Tao
  • Publication number: 20030068376
    Abstract: Dosage forms of a nicotine delivery system are disclosed in which a mucoadhesive film, made up of one or more non-microbial hydrocolloid(s) and an effective dose of nicotine, dissolves when applied intraorally to release the nicotine which is absorbed through the oramucosae and directly reaches systemic circulation. Methods for preparing various versions of the dosage forms are disclosed. Methods to assist smoking cessation or provide substitutes for smoking by administrating the dosage form are also provided.
    Type: Application
    Filed: April 18, 2002
    Publication date: April 10, 2003
    Applicant: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, Alfred Liang
  • Publication number: 20030068378
    Abstract: Mucosal surface-coat-forming film dosage units containing a water-soluble hydrocolloid, an effective dose of a sexual dysfunction active agent and a mucosal adhesion enhancer, wherein the mucosal adhesion enhancer is a starch graft copolymer.
    Type: Application
    Filed: March 5, 2002
    Publication date: April 10, 2003
    Applicant: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, William R. Pfister, Donald W. Renn, Thitiwan Buranachokpaisan, James Osborne, Hock Seng Tan, Li Tao
  • Publication number: 20020147201
    Abstract: The products and methods of the present invention provide a means for increasing the solubility and bioavailability of active agents. More particularly the invention provides compositions containing active agents as water-soluble complexes with glycyrrhizin, and methods of preparing such complexes. The invention further provides methods for the preparation of highly water soluble complex dosage forms.
    Type: Application
    Filed: February 8, 2002
    Publication date: October 10, 2002
    Applicant: Lavipharm Laboratories Inc.
    Inventors: Li-Lan H. Chen, Li Tao, Alfred Liang
  • Patent number: 5362308
    Abstract: Provided are disposable dosage units for use in iontophoresis-facilitated transdermal delivery which have hydrophilic polymer first and second layers, the first layer having ionic resin particles dispersed therein and the second layer having an ionized pharmaceutical contained. The second layer having on its surface a thin fabric layer bearing an adhesive layer. The polymer first and second layers are separated by a permselective membrane. Also provided are related devices and processes using the novel disposable dosage units.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: November 8, 1994
    Assignee: Rutgers, The State University of New Jersey
    Inventors: Yie W. Chien, Li-Lan H. Chen