Patents by Inventor Christoph Kröhnke

Christoph Kröhnke 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).

  • Photoresist
    Patent number: 5153101
    Abstract: Photocurable and solvent-developable compositions based on photopolymerizable (meth)acrylates, a photoinitiator for (meth)acrylates, an organic polymeric binder which comprises free carboxyl groups and has an acid number of at least 60, a blocked polyisocyanate crosslinking agent which has a cleavage temperature of at least 100.degree. C., and an inert solvent in an amount such that the photocurable composition is pourable, are described.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: October 6, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Kurt Meier, Robert J. Lunn, Christoph Kroehnke, Giuliano Eugster