Patents by Inventor Christian Stern

Christian Stern 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).

  • Patent number: 7378221
    Abstract: Mixtures of metallocenyl phthalocyanines obtainable by reacting a mixture A comprising two phthalocyanines: with a metallocene derivative in the presence of a catalyst, and also oligomeric metallocenyl phthalocyanines, processes for preparing them, their use for, inter alia, optical recording and optical recording media.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: May 27, 2008
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jürgen Beyrich, Rudolf Blattner, Jean-Luc Budry, Wolfgang Freitag, Colin Morton, Gerald Anthony Murphy, Beat Schmidhalter, Michael Schulz, Heinz Spahni, Christian Stern, Annemarie Wolleb, Heinz Wolleb, Roland Zoelper
  • Patent number: 7034148
    Abstract: Mixtures of metallocenyl phthalocyanines obtainable by reacting a mixture A comprising two phthalocyanines (I) and (II) with a metallocene derivative in the presence of a catalyst, and also oligomeric metallocenyl phthalocyanines, processes for preparing them, their use for, inter alia, optical recording and optical recording media
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: April 25, 2006
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jürgen Beyrich, Rudolf Blattner, Jean-Luc Budry, Wolfgang Freitag, Colin Morton, Gerald Anthony Murphy, Beat Schmidhalter, Michael Schulz, Heinz Spahni, Christian Stern, Annemarie Wolleb, Heinz Wolleb, Roland Zoelper
  • Publication number: 20050250942
    Abstract: Mixtures of metallocenyl phthalocyanines obtainable by reacting a mixture A comprising two phthalocyanines: with a metallocene derivative in the presence of a catalyst, and also oligomeric metallocenyl phthalocyanines, processes for preparing them, their use for, inter alia, optical recording and optical recording media.
    Type: Application
    Filed: June 28, 2005
    Publication date: November 10, 2005
    Inventors: Jurgen Beyrich, Rudolf Blattner, Jean-Luc Budry, Wolfgang Freitag, Colin Morton, Gerald Murphy, Beat Schmidhalter, Michael Schulz, Heinz Spahni, Christian Stern, Annemarie Wolleb, Heinz Wolleb, Roland Zoelper
  • Publication number: 20040132990
    Abstract: Mixtures of metallocenyl phthalocyanines obtainable by reacting a mixture A comprising two phthalocyanines (I) and (II) with a metallocene derivative in the presence of a catalyst, and also oligomeric metallocenyl phthalocyanines, processes for preparing them, their use for, inter alia, optical recording and optical recording media.
    Type: Application
    Filed: October 10, 2003
    Publication date: July 8, 2004
    Inventors: Jurgen Beyrich, Rudolf Blattner, Jean-Luc Budry, Wolfgang Freitag, Colin Morton, Gerald Anthony Murphy, Beat Schmidhalter, Michael Schulz, Heinz Spahni, Christian Stern, Annemarie Wolleb, Heinz Wolleb, Roland Zoelper
  • Patent number: 5791853
    Abstract: The present invention provides a flexible cable and support band assembly which is dynamically stable at high speeds over long lengths. This has been accomplished by cupping both the flexible cable and the support band in cross section along their lengths so that they cup one within the other to essentially move as a unit even though they are not attached except at their ends. A single support band can be employed to support multiple flexible cables. Additional support has been provided by employing resilient spaced apart strips along a track upon which the one or more flexible cables and support band slide. The resilient strips center the travel of the one or more flexible cables and support band and minimize rocking motion and vibration. Still further the one or more flexible cables and support band are arranged with respect to a robotic media library so that a single length of the one or more flexible cables and the support band will serve a range of lengths of the library.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: August 11, 1998
    Assignee: International Business Machines Corporation
    Inventors: Craig Thomas Danielson, James Leroy Overacker, Gustave Christian Stern, Martin David Williams
  • Patent number: 5669749
    Abstract: The present invention provides a flexible cable and support band assembly which is dynamically stable at high speeds over long lengths. This has been accomplished by cupping both the flexible cable and the support band in cross section along their lengths so that they cup one within the other to essentially move as a unit even though they are not attached except at their ends. A single support band can be employed to support multiple flexible cables. Additional support has been provided by employing resilient spaced apart strips along a track upon which the one or more flexible cables and support band slide. The resilient strips center the travel of the one or more flexible cables and support band and minimize rocking motion and vibration. Still further the one or more flexible cables and support band are arranged with respect to a robotic media library so that a single length of the one or more flexible cables and the support band will serve a range of lengths of the library.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: September 23, 1997
    Assignee: International Business Machines Corporation
    Inventors: Craig T. Danielson, James Lawrence Overacker, Gustave Christian Stern, Martin David Williams
  • Patent number: 4931566
    Abstract: Process for the preparation of 1,4-diketopyrrolo[3,4-c]pyrroles of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are phenyl, biphenyl or naphthyl radicals or aromatic O-heterocyclic, S-heterocyclic or N-heterocyclic radicals, by reacting 1 mole of a dicyclohexyl succinate, dialkyl succinate, monoalkylmonophenyl or diphenyl succinate, alkyl in the succinic acid ester radical being C.sub.1 -C.sub.18 alkyl and phenyl being phenyl which is unsubstituted or substituted by one or two halogen atoms or one or two C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkoxy groups, with 2 moles of a nitrile of the formula II or III or with 1 mole of a nitrile of the formula II and 1 mole of a nitrile of the formula III ##STR2## in which R.sub.1 and R.sub.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: June 5, 1990
    Assignee: Ciba-Geigy Corporation
    Inventors: Werner Surber, Abul Iqbal, Christian Stern