Patents by Inventor Robert J. Lunn

Robert J. Lunn 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).

  • Preparation of sulphoxonium salts
    Patent number: 5576461
    Abstract: The present invention provides a process for preparing a sulphoxonium salt from the corresponding sulphonium salt which comprises oxidising the sulphonium salt using a peracid, under basic conditions, in a solvent other than a ketone.Some of the sulphoxonium salts are new compounds.
    Type: Grant
    Filed: December 6, 1990
    Date of Patent: November 19, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Edward Irving, Robert J. Lunn, David A. Taylor, Alan H. Haines, John P. Innocenzi
  • Photoresist
    Patent number: 5286611
    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: July 20, 1992
    Date of Patent: February 15, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Kurt Meier, Robert J. Lunn, Christoph Kroehnke, Giuliano Eugster
  • 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