Patents by Inventor Jong Soo An

Jong Soo An 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).

  • Cellulosic materials having composite crystalline structure
    Patent number: 6802869
    Abstract: Disclosed is a novel rayon fiber which possesses characteristics similar to those of a viscose rayon fiber as to be suitable for use in clothes in addition to being produced at an economical cost. The rayon fiber is prepared from a cellulose acetate fiber with a degree of substitution of 2.0 or higher by saponifying 75% or greater of the total acetyl groups of the cellulose acetate fiber into hydroxyl groups and has a composite crystalline structure of cellulose II and IV.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: October 12, 2004
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Ik Soo Kim, Jong Soo An, Byung Hak Kim
  • Cellulosic materials having composite crystalline structure
    Publication number: 20020098355
    Abstract: Disclosed is a novel rayon fiber which possesses characteristics similar to those of a viscose rayon fiber as to be suitable for use in clothes in addition to being produced at an economical cost. The rayon fiber is prepared from a cellulose acetate fiber with a degree of substitution of 2.0 or higher by saponifying 75% or greater of the total acetyl groups of the cellulose acetate fiber into hydroxyl groups and has a composite crystalline structure of cellulose II and IV.
    Type: Application
    Filed: January 11, 2002
    Publication date: July 25, 2002
    Inventors: Ik Soo Kim, Jong Soo An, Byung Hak Kim
  • Cellulosic materials having composite crystalline structure
    Patent number: 6361862
    Abstract: Disclosed is a novel rayon fiber which possesses characteristics similar to those of a viscose rayon fiber as to be suitable for use in clothes in addition to being produced at an economical cost. The rayon fiber is prepared from a cellulose acetate fiber with a degree of substitution of 2.0 or higher by saponifying 75% or greater of the total acetyl groups of the cellulose acetate fiber into hydroxyl groups and has a composite crystalline structure of cellulose II and IV.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: March 26, 2002
    Assignee: SK Chemicals Co., Ltd.
    Inventors: Ik Soo Kim, Jong Soo An, Byung Hak Kim