Patents by Inventor Alexander Putz

Alexander Putz 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).

  • Use of benzimidazole derivatives as light protection filters
    Patent number: 5501850
    Abstract: The invention relates to the use of benzimidazole derivatives of the formula I, ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Ar have the meaning given in claim 1, as light protection filters in cosmetic formulations, at least one of the radicals R.sup.1 to R.sup.4 or an alkyl or alkoxy substituent of the group Ar containing at least 4 C atoms.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: March 26, 1996
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Ingeborg Stein, Ulrich Heywang, Alexander Putz, Roland Martin