Patents by Inventor Hans D. Thomas

Hans D. Thomas 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).

  • Process for improving the flowability of dimerized 2,4-tolylenediisocyanate
    Patent number: 5100998
    Abstract: The invention relates to a process for improving the flowability and preventing the agglomeration of finely divided dimerized 2,4-toluene diisocyanate in which a precipitated silicas and/or pyrogenic silica having a hydrophobic surface is added to the finely divided dimerized 2,4-toluene diisocyanate. The invention also relates to the finely divided dimerized 2,4-toluene diisocyanate prepared by this process.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: March 31, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Richard Kopp, Gerhard Grogler, Heinrich Hess, Lutz Georgias, Helmut Hurnik, Hans D. Thomas