Patents by Inventor Berthold Trageser

Berthold Trageser 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).

  • Dispersion containing pyrogenically manufactured abrasive particles with superparamagnetic domains
    Patent number: 6761747
    Abstract: An aqueous dispersion containing abrasive particles comprises abrasive particles having superparamagnetic metal oxide domains in a non-magnetic metal oxide or non-metal oxide matrix. The abrasive particles of the aqueous dispersion can have an average particle size of below 400 nm and a BET surface area of 50 to 600 m2/g. The dispersion can be produced by dispersing the abrasive particles with an energy of at least 200 kJ/m3 using a device in which the abrasive particles are first subjected to high pressure, then decompressed through a nozzle so that the abrasive particles collide with one another or against sections of wall in the device. The aqueous dispersion can be used for chemical mechanical polishing (CMP).
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: July 13, 2004
    Assignee: Degussa AG
    Inventors: Heiko Gottfried, Markus Pridoehl, Berthold Trageser, Guido Zimmermann, Stefan Heberer, Heike Muehlenweg
  • Superparamagnetic oxidic particles, processes for their production and their use
    Patent number: 6746767
    Abstract: Pyrogenic, oxidic particles contain superparamagnetic metal oxide domains with a diameter of 3 to 20 nm in a non-magnetic metal or non-metal oxide matrix. The particles display a chloride content of 50 to 1000 ppm. The particles are produced by pyrogenic processes by mixing the precursor of the superparamagnetic domains and the precursor of the non-magnetic metal or non-metal oxide matrix in a flame with air and/or oxygen and fuel gas and reacting this mixture in a flame. The particles can be used as ferro fluids, for example.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: June 8, 2004
    Assignee: Degussa AG
    Inventors: Heiko Gottfried, Christian Janzen, Markus Pridoehl, Paul Roth, Berthold Trageser, Guido Zimmermann
  • Dispersion containing pyrogenically manufactured abrasive particles with superparamagnetic domains
    Publication number: 20030100187
    Abstract: An aqueous dispersion containing abrasive particles comprises abrasive particles having superparamagnetic metal oxide domains in a non-magnetic metal oxide or non-metal oxide matrix. The abrasive particles of the aqueous dispersion can have an average particle size of below 400 nm and a BET surface area of 50 to 600 m2/g. The dispersion can be produced by dispersing the abrasive particles with an energy of at least 200 kJ/m3 using a device in which the abrasive particles are first subjected to high pressure, then decompressed through a nozzle so that the abrasive particles collide with one another or against sections of wall in the device. The aqueous dispersion can be used for chemical mechanical polishing (CMP).
    Type: Application
    Filed: October 24, 2002
    Publication date: May 29, 2003
    Applicant: Degussa AG
    Inventors: Heiko Gottfried, Markus Pridoehl, Berthold Trageser, Guido Zimmermann, Stefan Heberer, Heike Muehlenweg
  • Superparamagnetic oxidic particles, processes for their production and their use
    Publication number: 20030059603
    Abstract: Pyrogenic, oxidic particles contain superparamagnetic metal oxide domains with a diameter of 3 to 20 nm in a non-magnetic metal or non-metal oxide matrix. The particles display a chloride content of 50 to 1000 ppm. The particles are produced by pyrogenic processes by mixing the precursor of the superparamagnetic domains and the precursor of the non-magnetic metal or non-metal oxide matrix in a flame with air and/or oxygen and fuel gas and reacting this mixture in a flame. The particles can be used as ferro fluids, for example.
    Type: Application
    Filed: August 16, 2002
    Publication date: March 27, 2003
    Applicant: DEGUSSA AG
    Inventors: Heiko Gottfried, Christian Janzen, Markus Pridoehl, Paul Roth, Berthold Trageser, Guido Zimmermann