Patents by Inventor Waltraud Poersch

Waltraud Poersch 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).

  • Catalysts for preparing polyisocyanates containing isocyanurate groups, and their use
    Patent number: 6875243
    Abstract: Catalysts and processes for preparing polyisocyanates containing isocyanurate groups, and their use, wherein the catalysts are represented by the following formula (1): [Hl?Xm?Fn?]p·[R(4?q)Si(NR1R2)q]r??(I), wherein n=m+l with 1?m/n>0, and l?0, p>0 and r>0, and the ratio p/r is any value, q=1 or 2, and R, R1, R2 and X are as defined.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: April 5, 2005
    Assignee: Degussa AG
    Inventors: Michael Ewald, Manuela Windmueller, Waltraud Poersch, Stephan Kohlstruk
  • Catalysts for preparing polyisocyanates containing isocyanurate groups, and their use
    Publication number: 20030135007
    Abstract: A silicon based catalyst containing the reaction product of a silylamide and a fluoride is used to react isocyanate compounds. The catalyst is prepared in situ or before the reaction of the isocyanate. The catalyst is capable of trimerizing isocyanates.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 17, 2003
    Applicant: DEGUSSA AG
    Inventors: Michael Ewald, Manuela Windmueller, Waltraud Poersch, Stephan Kohlstruk
  • Catalysts for preparing polyisocyanates containing isocyanurate groups, and their use
    Publication number: 20030109665
    Abstract: Catalysts and processes for preparing polyisocyanates containing isocyanurate groups, and their use
    Type: Application
    Filed: November 27, 2002
    Publication date: June 12, 2003
    Applicant: DEGUSSA AG
    Inventors: Michael Ewald, Manuela Windmueller, Waltraud Poersch, Stephan Kohlstruk