Patents by Inventor Seung Sang Hwang

Seung Sang Hwang 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).

  • Nano-sized metals or metal salts stabilized by using chain-end functionalized polymers and their synthetic methods
    Publication number: 20040030019
    Abstract: Disclosed are nano-sized metals and metal salts stabilized by using semi-telechelic and telechelic polymers prepared through living anionic polymerization, and their synthetic methods, and a nanostructure wherein the nano-sized particles are self-assembled by mixing block copolymers and film-casting. The present invention provides a new method for preparing nano-sized particles capable of easily accomplishing nanostructure by merely mixing, especially with block copolymers, and having excellent stability.
    Type: Application
    Filed: October 23, 2002
    Publication date: February 12, 2004
    Inventors: Jungahn Kim, Kwang Ung Kim, Seung Sang Hwang, Dong-Youn Shin, Jang Seop Kim, Soon-Geun Hwang, Keon Hyeong Kim
  • Polyalkylaromaticsilsesquioxane and preparation method thereof
    Patent number: 6599995
    Abstract: The present invention relates to a highly regular and well-defined ladder structured polyorganosilsesquioxane with superior heat resistance, combustion resistance and flexibility. This product is made by alternatingly bonding together two kinds of substituents. The polyorganosilsesquioxane prepared according to the present invention has a small molecular weight distribution and a high molecular weight. It is soluble in organic solvents because its three-dimensional network structure is not formed as a result of a condensation polymerization, which resulted in a product having structure defect(s) and randomness because of the oligomer that was previously used as a starting material for polymerization. Polyalkylaromaticsilsesquioxanes obtained according to the preparing method of the present invention are useful, heat-resistant materials.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: July 29, 2003
    Assignee: Korea Institute of Science and Technology
    Inventors: Seung-Sang Hwang, Soon-Man Hong, Eung-Chan Lee, Seung-Pyo Hong
  • Polyalkylaromaticsilsesquioxane and preparation method thereof
    Publication number: 20020169269
    Abstract: The present invention relates to a highly regular and well-define structured polyorganosilsesquioxane with superior heat resistance, combustion resistance and flexibility, wherein two kinds of substituents are bonded alternately, and the preparation method thereof. The present invention provides polyorganosilsesquioxane with superior heat resistance, combustibility and flexibility. The polyorganosilsesquioxane prepared from the present invention has small molecular weight distribution and high molecular weight, and is soluble in organic solvent because a three-dimensional network structure is not formed during the condensation polymerization, which is resulted from the structure defect and randomness of the oligomer as a starting material for polymerization.
    Type: Application
    Filed: May 1, 2001
    Publication date: November 14, 2002
    Inventors: Seung-Sang Hwang, Soon-Man Hong, Eung-Chan Lee, Seung-Pyo Hong