Patents by Inventor Elisabeth Droste

Elisabeth Droste 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).

  • METHOD FOR THE PRODUCTION OF VALVE METAL POWDERS
    Publication number: 20180308641
    Abstract: The present invention relates to a process for the deoxidation of valve metal primary powders by means of reducing metals and/or metal hydrides, and a process for the production of tantalum powders that are suitable as anode material for electrolytic capacitors.
    Type: Application
    Filed: April 9, 2018
    Publication date: October 25, 2018
    Inventors: Helmut Haas, Ulrich Bartmann, Christoph Schnitter, Elisabeth Droste
  • Method for the production of valve metal powders
    Patent number: 10032564
    Abstract: The present invention relates to a process for the deoxidation of valve metal primary powders by means of reducing metals and/or metal hydrides, and a process for the production of tantalum powders that are suitable as anode material for electrolytic capacitors.
    Type: Grant
    Filed: September 24, 2005
    Date of Patent: July 24, 2018
    Assignee: H.C. Starck Tantalum and Niobium GmbH
    Inventors: Helmut Haas, Ulrich Bartmann, Christoph Schnitter, Elisabeth Droste
  • METHOD FOR THE PRODUCTION OF VALVE METAL POWDERS
    Publication number: 20090214378
    Abstract: The present invention relates to a process for the deoxidation of valve metal primary powders by means of reducing metals and/or metal hydrides, and a process for the production of tantalum powders that are suitable as anode material for electrolytic capacitors.
    Type: Application
    Filed: September 24, 2005
    Publication date: August 27, 2009
    Applicant: H.C. Starck GmbH & Co. KG
    Inventors: Helmut Haas, Ulrich Bartmann, Christoph Schnitter, Elisabeth Droste
  • Process for the epoxidation of CIS double bonds
    Patent number: 6610864
    Abstract: The selective epoxidation of cis double bonds of macrocyclic aliphatic hydrocarbons having 8 to 20 ring carbon atoms occurs by a catalytic process. The macrocyclic aliphatic hydrocarbons may optionally contain one or more side chains and in which at least one further trans double bond is simultaneously present. The used catalyst system consists of a cationic phase-transfer catalyst and an anionic polyoxometallate which is a polytungstate or a polymolybdate. Additionally, it comprises one or more elements selected from germanium, tin, lead, arsenic, antimony, bismuth, selenium, tellurium and polonium, and optionally one or more transition metals from group 4 to 12 of the Periodic Table.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: August 26, 2003
    Assignee: Degussa AG
    Inventors: Bernt Krebs, Elisabeth Droste, Markus Piepenbrink, Guido Vollmer, Georg Oenbrink, Thomas Schiffer
  • Process for the epoxidation of CIS double bonds
    Publication number: 20020091275
    Abstract: The selective epoxidation of cis double bonds of macrocyclic aliphatic hydrocarbons having 8 to 20 ring carbon atoms occurs by a catalytic process. The macrocyclic aliphatic hydrocarbons may optionally contain one or more side chains and in which at least one further trans double bond is simultaneously present. The used catalyst system consists of a cationic phase-transfer catalyst and an anionic polyoxometallate which is a polytungstate or a polymolybdate. Additionally, it comprises one or more elements selected from germanium, tin, lead, arsenic, antimony, bismuth, selenium, tellurium and polonium, and optionally one or more transition metals from group 4 to 12 of the Periodic Table.
    Type: Application
    Filed: November 5, 2001
    Publication date: July 11, 2002
    Applicant: DEGUSSA AG
    Inventors: Bernt Krebs, Elisabeth Droste, Markus Piepenbrink, Guido Vollmer, Georg Oenbrink, Thomas Schiffer