Patents by Inventor Hungnan Lo

Hungnan Lo 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: 20080294256
    Abstract: Methods for tendon and ligament repair using a scaffolding matrix material. The scaffolding matrix material is an off-the-shelf organic dermis from an unknown source which has been extra-operatively prepared so as to be devoid of viable cells which normally express antigens, and to promote natural healing of soft tissue via revascularization and repopulation. The scaffolding matrix material is used to join ruptured tendons or ligaments together and to join ligaments to bone.
    Type: Application
    Filed: August 4, 2008
    Publication date: November 27, 2008
    Inventors: Cary P. Hagan, Rick P. Swaim, Kelly W. Schlachter, James J. Chao, Hungnan Lo
  • Patent number: 7407511
    Abstract: This invention is generally directed to methods and materials for connective tissue repair. The invention is more specifically related to methods and materials for the repair of tendons and ligaments, especially in the hand. Methods and materials for rotator cuff repair are also disclosed. The use of extraoperatively obtained scaffolding matrices is promoted when reapproximating the connective tissue.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: August 5, 2008
    Assignee: Wright Medical Technology Inc
    Inventors: Cary P. Hagan, Rick P. Swaim, Kelly W. Schlachter, James J. Chao, Hungnan Lo
  • Publication number: 20070031498
    Abstract: The invention includes compositions for inhibiting cellular adhesion, methods of preparation of such compositions, and methods for preventing cell adhesion at a surgical site comprising application of such compositions. The compositions generally comprise a cellular adhesion inhibitory agent, such as dextran sulfate, and a crosslinked hydrogel matrix, preferentially physically entrapping the adhesion inhibitory agent. The hydrogel matrix can include a first gel component, such as an electrophilically functionalized polyethylene glycol polymer, and at least one additional gel component, preferably nucleophilically functionalized, and preferentially selected from the group consisting of polyethylene glycol polymers, polypeptides, and polysaccharides. The compositions are useful for delivering the cellular adhesion inhibitory agent to a site in need of adhesion inhibition and providing either immediate or metered delivery of the inhibitory agent.
    Type: Application
    Filed: August 2, 2006
    Publication date: February 8, 2007
    Inventors: Xinhua Zong, Hungnan Lo
  • Publication number: 20050255140
    Abstract: This invention is generally directed to methods and materials for connective tissue repair. The invention is more specifically related to methods and materials for the repair of tendons and ligaments, especially in the hand. Methods and materials for rotator cuff repair are also disclosed. The use of extraoperatively obtained scaffolding matrices is promoted when reapproximating the connective tissue.
    Type: Application
    Filed: May 13, 2004
    Publication date: November 17, 2005
    Inventors: Cary Hagan, Rick Swaim, Kelly Schlachter, James Chao, Hungnan Lo
  • Patent number: 6600010
    Abstract: Biodegradable terephthalate polymers are described comprising the recurring monomeric units shown in formula I: wherein R is a divalent organic moiety; R′ is an aliphatic, aromatic or heterocyclic residue; x is ≧1; and n is 0-5,000, wherein the biodegradable polymer is biocompatible before and upon biodegradation. Processes for preparing the polymers, compositions containing the polymers and biologically active substances, articles useful for implantation or injection into the body fabricated from the compositions, and methods for controllably releasing biologically active substances using the polymers, are also described.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: July 29, 2003
    Assignees: Guilford Pharmaceuticals, Inc., John Hopkins University
    Inventors: Hai-Quan Mao, Kam W. Leong, Wenbin Dang, Hungnan Lo, Zhong Zhao, David P. Nowotnik, James P. English
  • Publication number: 20020091230
    Abstract: Biodegradable terephthalate polymers are described comprising the recurring monomeric units shown in formula I: 1
    Type: Application
    Filed: August 2, 2001
    Publication date: July 11, 2002
    Inventors: Hai-Quan Mao, Kam W. Leong, Wenbin Dang, Hungnan Lo, Zhong Zhao, David P. Nowotnik, James P. English
  • Patent number: 6322797
    Abstract: Biodegradable terephthalate polymers are described comprising the recurring monomeric units shown in formula I: wherein R is a divalent organic moiety; R′ is an aliphatic, aromatic or heterocyclic residue; x is ≧1; and n is 0-5,000, wherein the biodegradable polymer is biocompatible before and upon biodegradation. Processes for preparing the polymers, compositions containing the polymers and biologically active substances, articles useful for implantation or injection into the body fabricated from the compositions, and methods for controllably releasing biologically active substances using the polymers, are also described.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: November 27, 2001
    Assignees: Guilford Pharmaceuticals, Inc., Johns Hopkins University
    Inventors: Hai-Quan Mao, Kam W. Leong, Wenbin Dang, Hungnan Lo, Zhong Zhao, David P. Nowotnik, James P. English
  • Patent number: 6126956
    Abstract: A non-abusable, non-inflammatory, biocompatible, non-biodegradable, subcutaneous, polymeric implant for the prolonged, controlled release of hydromorphone with near zero-order kinetics is described. Methods of alleviating cancer pain and treating opioid drug addiction with the implant are also described.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: October 3, 2000
    Assignee: Axxia Technologies
    Inventors: Stuart A. Grossman, Kam W. Leong, Glenn J. Lesser, Hungnan Lo
  • Patent number: 5858388
    Abstract: A non-abusable, non-inflammatory, biocompatible, non-biodegradable, subcutaneous, polymeric implant for the prolonged, controlled release of hydromorphone with near zero-order kinetics is described. Methods of alleviating cancer pain and treating opioid drug addiction with the implant are also described.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: January 12, 1999
    Assignee: Axxia Technologies
    Inventors: Stuart A. Grossman, Kam W. Leong, Glenn J. Lesser, Hungnan Lo
  • Patent number: 5686091
    Abstract: A structurally rigid biodegradable foam scaffold useful for cell transplantation is provided. The foam can be loaded with nutrients and/or drugs that elute from the foam during transplant to promote growth of the cells. The foam, which features a continuous network of pores, is fabricated using a novel method involving phase separation and consequent expansion upon sublimation of a liquid solvent, preferably naphthalene.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: November 11, 1997
    Assignee: The Johns Hopkins University School of Medicine
    Inventors: Kam W. Leong, Hungnan Lo, Sudhakar Kadiyala
  • Patent number: 5633000
    Abstract: A non-abusable, non-inflammatory, biocompatible, non-biodegradable, subcutaneous, polymeric implant for the prolonged, controlled release of hydromorphone with near zero-order kinetics is described. Methods of alleviating cancer pain and treating opioid drug addiction with the implant are also described.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: May 27, 1997
    Assignee: Axxia Technologies
    Inventors: Stuart A. Grossman, Kam W. Leong, Glenn J. Lesser, Hungnan Lo