Patents by Inventor Jean-Paul Pauchard

Jean-Paul Pauchard 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).

  • Stilbene compounds
    Patent number: 4180479
    Abstract: Novel stilbene compounds of the formula ##STR1## in which A is the radical ##STR2## in which R.sub.1 is hydrogen or chlorine and R.sub.2 is hydrogen or alkyl, Z is hydrogen, chlorine or phenyl and R.sub.3 is hydrogen, alkyl or chlorine, as well as their use in a process for optically brightening organic material are described.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: December 25, 1979
    Assignee: Ciba-Geigy Corporation
    Inventors: Adolf E. Siegrist, Jean-Paul Pauchard, Bernardo De Sousa
  • Stilbene compounds
    Patent number: 4113937
    Abstract: Novel stilbene compounds of the formula ##STR1## in which R.sub.1 and R.sub.2 independently of one another are hydrogen or chlorine and A is a mono-nuclear or poly-nuclear aromatic heterocyclic structure which contains oxygen atoms or oxygen and nitrogen atoms and is unsubstituted or substituted by non-chromophoric substituents, as well as their use in a process for optically brightening organic material are disclosed.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: September 12, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Adolf Emil Siegrist, Jean-Paul Pauchard