Patents by Inventor Guttikonda Yogendra Nath

Guttikonda Yogendra Nath 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).

  • Production method of polyisocyanate by end capping with acyl chloride
    Patent number: 7135536
    Abstract: The present invention relates to a polymerization method of polyisocyanates endcapped with acyl chlorides, and more particularly to a process for preparing polyisocyanate with higher stability comprising endcapping a living polymer chain amidate anion with an acyl chloride derivative in the presence of an amine catalyst, thereby enabling to maximize endcapping ratios.
    Type: Grant
    Filed: November 11, 2004
    Date of Patent: November 14, 2006
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Jae-Suk Lee, Chan Hee Jung, Sang-Yoon Park, Guttikonda Yogendra Nath, Shashahar Samal
  • Production method of polyisocyanate by end capping with acyl chloride
    Publication number: 20050209426
    Abstract: The present invention relates to a polymerization method of polyisocyanates endcapped with acyl chlorides, and more particularly to a process for preparing polyisocyanate with higher stability comprising endcapping a living polymer chain amidate anion with an acyl chloride derivative in the presence of an amine catalyst, thereby enabling to maximize endcapping ratios.
    Type: Application
    Filed: November 11, 2004
    Publication date: September 22, 2005
    Inventors: Jae-Suk Lee, Chan Hee Jung, Sang-Yoon Park, Guttikonda Yogendra Nath, Shashahar Samal