Patents by Inventor Christoph Koopmann

Christoph Koopmann 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 preparing polymers from monomers comprising laurolactam
    Publication number: 20190177478
    Abstract: Polymers can be prepared from monomers comprising laurolactam, by a process including a. Beckmann rearrangement of cyclododecanone oxime to give laurolactam in the presence of a Beckmann rearrangement catalyst, b. removal of impurities from the laurolactam to obtain purified laurolactam, and c. polymerization of monomers comprising purified laurolactam. For avoidance of discolouration or yellowing under ageing conditions, prior to the polymerization, polycyclic substances containing 24 carbon atoms and at least one heteroatom selected from oxygen and nitrogen and having a molar mass between 300 and 380 g/mol are limited to 500 ppm, based on laurolactam.
    Type: Application
    Filed: December 11, 2018
    Publication date: June 13, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Kévin MICOINE, Kristina ZUMBANSEN, Franz-Erich BAUMANN, Marcus Matthias STERGAR, Andreas PAWLIK, Christoph HILLER, Mirko MICHEL, Christoph KOOPMANN
  • Process for the separation of chlorosilanes from gas streams
    Patent number: 7204963
    Abstract: Chlorosilanes are continuously removed from a gas stream in an apparatus in which the gas stream is treated in a first stage with water vapor in the gas phase, and in a second stage with a liquid, aqueous phase.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: April 17, 2007
    Assignee: Degussa AG
    Inventors: Hartwig Rauleder, Franz-Michael Bollenrath, Harald Seiler, Mieczyslaw Kuzma, Christoph Koopmann
  • Process for the separation of chlorosilanes from gas streams
    Publication number: 20040109806
    Abstract: Chlorosilanes are continuously removed from a gas stream in an apparatus in which the gas stream is treated in a first stage with water vapor in the gas phase, and in a second stage with a liquid, aqueous phase.
    Type: Application
    Filed: November 19, 2003
    Publication date: June 10, 2004
    Applicant: DEGUSSA AG
    Inventors: Hartwig Rauleder, Franz-Michael Bollenrath, Harald Seiler, Mieczyslaw Kuzma, Christoph Koopmann
  • Process for the separation of chlorosilanes from gas streams
    Patent number: 6680038
    Abstract: Chlorosilanes are continuously removed from a gas stream in an apparatus in which the gas stream is treated in a first stage with water vapor in the gas phase, and in a second stage with a liquid, aqueous phase.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: January 20, 2004
    Assignee: Degussa AG
    Inventors: Hartwig Rauleder, Franz-Michael Bollenrath, Harald Seiler, Mieczyslaw Kuzma, Christoph Koopmann
  • Process for the separation of chlorosilanes from gas streams
    Publication number: 20010046465
    Abstract: Chlorosilanes are continuously removed from a gas stream in an apparatus in which the gas stream is treated in a first stage with water vapor in the gas phase, and in a second stage with a liquid, aqueous phase.
    Type: Application
    Filed: December 28, 2000
    Publication date: November 29, 2001
    Inventors: Hartwig Rauleder, Franz-Michael Bollenrath, Harald Seiler, Mieczyslaw Kuzma, Christoph Koopmann