Patents by Inventor Hardo Stegel

Hardo Stegel 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).

  • Polytetrahydrofuran derivatives having terminal aromatic groups
    Patent number: 5260484
    Abstract: Polytetrahydrofuran derivatives of the general formula ##STR1## where n is from 2 to 70, X is the bridge member --NH-- or --O-- and R.sup.1 to R.sup.4 are each hydrogen or various radicals.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: November 9, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Hickmann, Ulrich Koehler, Hardo Stegel