Patents by Inventor Keum-Chan Joo

Keum-Chan Joo 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).

  • Polyalkylene guanidine salts or polyalkylene biguanidine salts having a branched silane compound, method for preparing same and uses thereof
    Patent number: 6031119
    Abstract: Polyalkylene guanidine salts or polyalkylene biguanidine salts having a branched silane compound of formula I show excellent antimicrobial activity and can be applied to various materials including fibers, wood, paper, glass, resins and metals: ##STR1## wherein A is oxyethylene, oxypropylene, oxybutylene, oxystyrene, diphenylsulfone, diphenyl sulfide or alkylamide, which repeating number is 1 to 100,000, or straight or branched alkyl chain containing 1 to 20 carbon atoms;Y represents a blank, HCl, HBr, HI, HNO.sub.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: February 29, 2000
    Assignee: Yukong Limited
    Inventors: Byung-Hyoung Lee, Woo-Sun Kim, Young-Jun Kim, Sang-Gu Bang, Kwang-Min Lim, Sang-Rak Choi, Keum-Chan Joo