Patents by Inventor Christoph Tomczyk

Christoph Tomczyk 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: 10449714
    Abstract: A process for producing an object from a precursor comprises the steps of: depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply; repeating step II) until the precursor is formed; wherein the depositing of a free-radically crosslinked resin at least in step II) is effected by exposure and/or irradiation of a selected region of a free-radically crosslinkable resin corresponding to the respectively selected cross section of the object and wherein the free-radically crosslinkable resin has a viscosity (23° C., DIN EN ISO 2884-1) of ?5 mPas to ?100000 mPas.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: October 22, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Dirk Achten, Thomas Büsgen, Jörg Tillack, Michael Ludewig, Christoph Tomczyk, Roland Wagner
  • Publication number: 20190315062
    Abstract: A method for producing an article in which a layer (200) of meltable polymer is selectively melted at least partially. This takes place according to a selected cross section of the article to be formed. The at least partially melted material is added on layer by layer to a carrier (500) or to previous layers bonded to the carrier (500). A system that is suitable for carrying out the method according to the invention has a substrate (100), a control unit (600), an application unit (700) for applying the particles to the substrate (100), an energy exposure unit (700) and a contacting unit (800).
    Type: Application
    Filed: November 22, 2017
    Publication date: October 17, 2019
    Inventors: Dirk ACHTEN, Thomas BÜSGEN, Christoph TOMCZYK, Roland WAGNER, Bettina METTMANN, Dirk DIJKSTRA, Levent AKBAS, Arnaud GUEDOU
  • Publication number: 20190275732
    Abstract: A method for producing an article in which a layer with a radically cross-linkable resin is selectively crosslinked at least partially. This takes place according to a selected cross section of the article to be formed by means of selective application of a radical initiator. The at least partially crosslinked material is added on layer by layer to a carrier or to previous layers bonded to the carrier. A system that is suitable for carrying out the method according to the invention has a substrate, a control unit, an application unit for applying the resin to the substrate, an application unit for applying an initiator to the resin, an energy exposure unit and a contacting unit.
    Type: Application
    Filed: December 4, 2017
    Publication date: September 12, 2019
    Inventors: Dirk ACHTEN, Thomas BÜSGEN, Michael LUDEWIG, Roland WAGNER, Christoph TOMCZYK, Jörg TILLACK, Arnaud GENOU
  • Publication number: 20180133953
    Abstract: A process for producing an object from a precursor comprises the steps of: depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply; repeating step II) until the precursor is formed; wherein the depositing of a free-radically crosslinked resin at least in step II) is effected by exposure and/or irradiation of a selected region of a free-radically crosslinkable resin corresponding to the respectively selected cross section of the object and wherein the free-radically crosslinkable resin has a viscosity (23° C., DIN EN ISO 2884-1) of ?5 mPas to ?100000 mPas.
    Type: Application
    Filed: November 14, 2017
    Publication date: May 17, 2018
    Inventors: Dirk Achten, Thomas Büsgen, Jörg Tillack, Michael Ludewig, Christoph Tomczyk, Roland Wagner