Patents by Inventor Bruno Zinz

Bruno Zinz 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).

  • Condensation products of terphenylsulphonic acids, naphthalenesulphonic acids, bis-(4-hydroxyphenyl) sulphone and formaldehyde
    Patent number: 4245996
    Abstract: Condensation products which are obtained by co-condensation, in an acid aqueous medium, of terphenylsulphonic acids, naphthalenesulphonic acid, bis-(4-hydroxyphenyl) sulphone and compounds which release formaldehyde are used as tanning agents for the production of leather and as re-tanning agents for re-tanning mineral-tanned leather.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: January 20, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz Schade, Reinhard Nebeling, Bruno Zinz