Patents by Inventor Hans Rudolf Biland

Hans Rudolf Biland 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).

  • Asymmetrical oxalic acid diaryl amide stabilizers
    Patent number: 4003875
    Abstract: The invention concerns specific new oxalic acid diarylamides which are characterized by an asymmetrical substitution with regard to the central oxalic amide moiety of the formula--NH--CO--CO--NH--and by substitution with one or two alkoxy, alkenyloxy, aralkenyloxy or acyloxy groups. Definite additional substituents may be present. The compounds are valuable ultraviolet stabilizers.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: January 18, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Christian Luthi, Max Dunnenberger, Hans Rudolf Biland