Patents by Inventor Ih Chang

Ih 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: 20210188982
    Abstract: Provided herein, in some embodiments, are methods for reducing the risk of developing progressive multifocal leukemia in patients undergoing natalizumab therapy by switching to an extended interval dosing (EID) schedule.
    Type: Application
    Filed: October 25, 2018
    Publication date: June 24, 2021
    Inventors: Nolan Robert Campbell, Ih Chang, Bharath Kumar Kandadi Muralidharan, Ivan Alexandrov Nestorov
  • Publication number: 20070293569
    Abstract: The present invention relates to pentaerythritol derivatives represented by the following formula 1, which improve moisture retaining ability of the stratum corneum when show high moisturizing ability even in dry conditions, to a preparation method thereof, and to a liquid crystal base containing the same. (Wherein R is the same or different, saturated or unsaturated, linear or branched alkyl groups of 1 to 24 carbon atoms having hydrogen or hydroxy group or not; m and n are the same or different integers of which m is 0 to 10 and n is 1 to 10).
    Type: Application
    Filed: February 28, 2005
    Publication date: December 20, 2007
    Inventors: Jae You, Chan Lee, Duck Kim, Kil Kim, Gae Nam, Byoung Lee, Ih Chang
  • Publication number: 20060188463
    Abstract: The present invention relates to a water-in-oil-in-water multiple emulsion system and a method for preparation thereof, characterized by hydrodynamically stabilizing the multiple emulsion system by using hydrodynamic dual stabilization (HDS) technology. The HDS technology hydrophobizes water molecules in the internal aqueous phase by using a hydrogen bonding inhibitor and by improving the aggregating force between water molecules in the internal aqueous phase by using a water molecule aggregating agent.
    Type: Application
    Filed: June 11, 2001
    Publication date: August 24, 2006
    Inventors: Jin Kim, Sung Lee, Byung Chae, Han Kim, Hak Kang, Ih Chang
  • Publication number: 20050112089
    Abstract: Conjugates of a biodegradable aliphatic polyester-based polymer with Tat49-57 peptide or a peptide chain containing the Tat49-57 peptide, and nanoparticles manufactured using the same. Intracellular permeability of the Tat49-57 peptide can be enhanced by exposing Tat peptide moieties to the surface of the nanoparticles.
    Type: Application
    Filed: January 3, 2005
    Publication date: May 26, 2005
    Inventors: Ju Park, Yoon Nam, Sang Han, Ih Chang
  • Patent number: 6492120
    Abstract: This invention relates generally to nucleic acid-based diagnostic assays for detecting, identifying and/or quantitating target sequences in a sample. More specifically, the invention utilizes sequential cleavage of nucleic acids to achieve target and signal amplification through cycling reactions.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: December 10, 2002
    Assignees: University of Maryland, Medical Analysis Systems, Inc.
    Inventors: Barbara Galvan, Jozsef Hepp, Ih Chang Hsu, Zsolt Lengyel, Rajiv Pande, James W. Shih
  • Patent number: 6455249
    Abstract: Detection of probe fragment products of basepair mismatch cleavage indicate the presence and sequence of target DNA. Detection of the target is enhanced by amplification through recycling targets by maintaining an assay temperature between the melting point of the target/probe DNA duplex and that of the target/product complex, in the presence of an amplifier comprising ammonium acetate or an amine derivative (for example, diethylamine, piperidine or ammonium carbonate). Cleavage reduces the size of the duplex, and thus lowering its melting point. The amplifier releases the target from the complex, thereby permitting further catalysis of cleavage and effectively amplifying the signal to be detected.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: September 24, 2002
    Assignees: National Institutes of Health, University of Maryland Baltimore
    Inventors: Ih-Chang Hsu, William E. Highsmith, Jr., James Shih
  • Patent number: 5683877
    Abstract: This invention relates to a method for identifying single base pair mismatches in nucleic acids using mismatch endonucleases and a set of labeled oligonucleotide probes which hybridize to mismatch sequences in the target nucleic acid such that a detectable enzyme-nucleic acid-probe complex forms or labeled cleaved fragments form when a base pair mismatch is present.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 4, 1997
    Assignee: The University of Maryland at Baltimore
    Inventors: A-Lien Lu-Chang, Ih-Chang Hsu
  • Patent number: 4289748
    Abstract: A method of quantitatively measuring antigen or antibody concentration by selectively coupling an antigen to a solid substrate, coupling an enzyme-conjugated antibody to the antigen and reacting a radioindicator with the enzyme-conjugate producing a radiolabelled product. The product is scintillation counted to yield the measurement. Direct or indirect coupling of the antigen to the substrate can be used. Direct or indirect coupling of the enzyme-conjugate can be used. The preferred radioindicator is adenosine-5'-monophosphate used with alkaline phosphatase. Others are presented.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: September 15, 1981
    Assignee: United States of America
    Inventors: Curtis C. Harris, Robert Yolken, Ih-Chang Hsu