Patents Examined by Katakam Sudhakar
  • Method for producing tetrahydrofuran copolymers
    Patent number: 7361793
    Abstract: The present invention relates to a process for the single-stage preparation of polyoxyalkylene glycols by copolymerization of THF and alpha, omega-diols in the presence of a heteropolyacid, wherein the content of organically bound nitrogen in the alpha, omega-diol is less than 15 ppm.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: April 22, 2008
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Haubner, Rolf Pinkos