Patents by Inventor Sven Engler

Sven Engler 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 an internally vitrified SiO2 crucible
    Patent number: 7178366
    Abstract: A process for producing an SiO2 shaped body which is at least partially vitrified, wherein an amorphous, porous SiO2 green body is sintered or vitrified by contactless heating by means of radiation, while avoiding contamination to the SiO2 shaped body with foreign atoms, wherein the radiation used is the beam of a laser at a subatmospheric pressure below 1000 mbar.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: February 20, 2007
    Assignee: Wacker Chemie AG
    Inventors: Fritz Schwertfeger, Jens Guenster, Sven Engler, Juergen Heinrich
  • Method for producing an si3n4 coated sio2 molded body
    Publication number: 20070013098
    Abstract: Silicone nitride coated shaped bodies of silica are prepared by coating a silica green body with silicon nitride or a precursor thereof, followed by sintering the silicone nitride coating by means of a laser beam. The shaped bodies are especially useful as “solar crucibles” in production of polycrystalline silicon for solar cells.
    Type: Application
    Filed: September 2, 2004
    Publication date: January 18, 2007
    Applicant: WACKER CHEMIE AG
    Inventors: Fritz Schwertfeger, Jens Günster, Sven Engler, Jürgen Heinrich
  • Process and a device for producing ceramic molds
    Patent number: 6827988
    Abstract: Ceramic molds are produced by sintering selected portions of a ceramic material with a laser beam to form the mold. The process involves application of at least one layer of a liquid suspension or plastic mass, drying the applied layer, and sintering the dried layer with the laser beam at selected areas to form the mold.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: December 7, 2004
    Assignee: Technische Universitat Clausthal
    Inventors: Tobias Krause, Sven Engler, Jens Gunster, Jurgen G. Heinrich
  • Method for the production of an internally vitrified SiO2 crucible
    Publication number: 20040237588
    Abstract: A process for producing an SiO2 shaped body which is at least partially vitrified, wherein an amorphous, porous SiO2 green body is sintered or vitrified by contactless heating by means of radiation, while avoiding contamination to the SiO2 shaped body with foreign atoms, wherein the radiation used is the beam of a laser at a subatmospheric pressure below 1000 mbar.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 2, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Fritz Schwertfeger, Jens Guenster, Sven Engler, Juergen Heinrich
  • SiO2 shaped body which has been vitrified in partial areas, process for producing it, and its use
    Publication number: 20040118158
    Abstract: A process for producing an SiO2 shaped body which is at least partially vitrified, wherein an amorphous, porous SiO2 green body is sintered or vitrified by contactless heating by means of radiation, while avoiding contamination to the SiO2 shaped body with foreign atoms, wherein the radiation used is the beam of a laser at a subatmospheric pressure below 1000 mbar.
    Type: Application
    Filed: December 10, 2003
    Publication date: June 24, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Fritz Schwertfeger, Axel Frauenknecht, Jens Guenster, Sven Engler, Juergen Heinrich
  • SiO2 shaped body which is vitrified in partial regions or completely, process for its production and use
    Publication number: 20030104920
    Abstract: A process for producing an SiO2 shaped body which is vitrified in a partial region or completely, in which process an amorphous, porous SiO2 preform is sintered or vitrified by contactless heating by means of laser radiation, by means of which contamination of the SiO2 shaped body with foreign atoms is avoided.
    Type: Application
    Filed: November 22, 2002
    Publication date: June 5, 2003
    Applicant: Wacker-Chemie GmbH
    Inventors: Fritz Schwertfeger, Holger Szillat, Jens Guenster, Sven Engler, Juergen Heinrich
  • Process and a device for producing ceramic molds
    Publication number: 20030001313
    Abstract: A process for producing ceramic molds by sintering selected portions of a ceramic material with a laser beam to form the mold has the following steps:
    Type: Application
    Filed: June 13, 2002
    Publication date: January 2, 2003
    Inventors: Tobias Krause, Sven Engler, Jens Gunster, Jurgen G. Heinrich