Patents by Inventor Urs Schwendimann

Urs Schwendimann 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).

  • Process for the preparation of acylphosphines, acyl oxides and acyl sulfides
    Patent number: 7214830
    Abstract: A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, with an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with acid halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, inter alia, that the processes are carried out without isolation of the intermediates.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: May 8, 2007
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: David George Leppard, Eugen Eichenberger, René Kaeser, Gebhard Hug, Urs Schwendimann
  • Process for the preparation of acylphosphines, acyl oxides and acyl sulfides
    Patent number: 7094931
    Abstract: A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, with an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with acid halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, inter alia, that the processes are carried out without isolation of the intermediates.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: August 22, 2006
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: David George Leppard, Eugen Eichenberger, René´ Kaeser, Gebhard Hug, Urs Schwendimann
  • Process for the preparation of acylphosphines, acyl oxides and acyl sulfides
    Publication number: 20060128959
    Abstract: A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, with an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with add halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, inter alia, that the processes are carried out without isolation of the intermediates.
    Type: Application
    Filed: February 6, 2006
    Publication date: June 15, 2006
    Inventors: David Leppard, Eugen Eichenberger, Rene Kaeser, Gebhard Hug, Urs Schwendimann
  • Process for the preparation of acylphosphines, acyl oxides and acyl sulfides
    Patent number: 6888031
    Abstract: A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, with an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with acid halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, inter alia, that the processes are carried out without isolation of the intermediates.
    Type: Grant
    Filed: November 20, 1999
    Date of Patent: May 3, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: David George Leppard, Eugen Eichenberger, René Kaeser, Gebhard Hug, Urs Schwendimann
  • Process for the preparation of acylphosphines, acyl oxides and acyl sulfides
    Publication number: 20040248855
    Abstract: A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, with an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with acid halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, Inter alia, that the processes are carried out without isolation of the intermediates.
    Type: Application
    Filed: May 17, 2004
    Publication date: December 9, 2004
    Inventors: David George Leppard, Eugen Eichenberger, Rene Kaeser, Gebhard Hug, Urs Schwendimann