Patents by Inventor Jerzy W. Jurewicz

Jerzy W. Jurewicz 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).

  • Publication number: 20200298313
    Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 24, 2020
    Applicant: TEKNA PLASMA SYSTEMS INC.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Alexandre Auger
  • Patent number: 10688564
    Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: June 23, 2020
    Assignee: TEKNA PLASMA SYSTEMS INC.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Alexandre Auger
  • Publication number: 20200171580
    Abstract: The present disclosure relates to a, process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: TEKNA PLASMA SYSTEMS INC.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Alexandre Auger
  • Patent number: 10028368
    Abstract: An induction plasma torch comprises a tubular torch body, a tubular insert, a plasma confinement tube and an annular channel. The tubular torch body has upstream and downstream sections defining respective inner surfaces. The tubular insert is mounted to the inner surface of the downstream section of the tubular torch body. The plasma confinement tube is disposed in the tubular torch body, coaxial therewith. The plasma confinement tube has a tubular wall having a thickness tapering off in an axial direction of plasma flow. The annular channel is defined between, on one hand, the inner surface of the upstream section of the tubular torch body and an inner surface of the insert and, on the other hand, an outer surface of the tubular wall of the plasma confinement tube. The cooling channel carries a fluid for cooling the plasma confinement tube.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: July 17, 2018
    Assignee: Tekna Plasma Systems, Inc.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Nicolas Dignard, Alexandre Auger, S├ębastien Thellend
  • Publication number: 20170326649
    Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Application
    Filed: August 2, 2017
    Publication date: November 16, 2017
    Applicant: TEKNA PLASMA SYSTEMS INC.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Alexandre Auger
  • Patent number: 9751129
    Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: September 5, 2017
    Assignee: TEKNA PLASMA SYSTEMS INC.
    Inventors: Maher I. Boulos, Alexandre Auger, Jerzy W. Jurewicz
  • Patent number: 9718131
    Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: August 1, 2017
    Assignee: TEKNA PLASMA SYSTEMS, INC.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Alexandre Auger
  • Publication number: 20170106448
    Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Applicant: TEKNA PLASMA SYSTEMS INC.
    Inventors: Maher I. BOULOS, Jerzy W. JUREWICZ, Alexandre AUGER
  • Publication number: 20160381777
    Abstract: An induction plasma torch comprises a tubular torch body, a tubular insert, a plasma confinement tube and an annular channel. The tubular torch body has upstream and downstream sections defining respective inner surfaces. The tubular insert is mounted to the inner surface of the downstream section of the tubular torch body. The plasma confinement tube is disposed in the tubular torch body, coaxial therewith. The plasma confinement tube has a tubular wall having a thickness tapering off in an axial direction of plasma flow. The annular channel is defined between, on one hand, the inner surface of the upstream section of the tubular torch body and an inner surface of the insert and, on the other hand, an outer surface of the tubular wall of the plasma confinement tube. The cooling channel carries a fluid for cooling the plasma confinement tube.
    Type: Application
    Filed: June 28, 2016
    Publication date: December 29, 2016
    Applicant: TEKNA PLASMA SYSTEMS INC.
    Inventors: Maher I. BOULOS, Jerzy W. JUREWICZ, Nicolas DIGNARD, Alexandre AUGER, S├ębastien THELLEND
  • Publication number: 20160175936
    Abstract: The present disclosure relates to a process and an apparatus for producing powder particles by atomization of a feed material in the form of an elongated member such as a wire, a rod or a filled tube. The feed material is introduced in a plasma torch. A forward portion of the feed material is moved from the plasma torch into an atomization nozzle of the plasma torch. A forward end of the feed material is surface melted by exposure to one or more plasma jets formed in the atomization nozzle. The one or more plasma jets being includes an annular plasma jet, a plurality of converging plasma jets, or a combination of an annular plasma jet with a plurality of converging plasma jets. Powder particles obtained using the process and apparatus are also described.
    Type: Application
    Filed: February 10, 2016
    Publication date: June 23, 2016
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Alexandre Auger
  • Patent number: 7964247
    Abstract: A process for the manufacture of sputtering target comprises the steps of i) providing a substrate; ii) plasma melting of a material selected to form the sputtering target, yielding droplets of molten material; and iii) deposition of the droplets onto the substrate, yielding a sputtering target comprised of the coated layer of the material on the substrate. In some application, it might be preferable that the substrate be a temporary substrate and iv) to join the coated temporary target via its coated layer to a permanent target backing material; and v) to remove the temporary substrate, yielding a sputtering target comprised of the coated layer of the material on the permanent target backing material. The plasma deposition step is carried out at atmospheric pressure or under soft vacuum conditions using, for example, d.c. plasma spraying, d.c. transferred arc deposition or induction plasma spraying. The process is simple and does not require subsequent operation on the resulting target.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: June 21, 2011
    Assignee: Tekna Plasma Systems, Inc.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz
  • Patent number: 7910048
    Abstract: The process for the synthesis of rhenium powders comprises the injection of ammonium perrhenate powder through a carrier gas in a plasma torch of a plasma reactor operated using a mixture including hydrogen as the plasma gas, yielding metallic rhenium under the following chemical reaction: 2NH4ReO4+4H2?2Re+N2?+8H2O?. The reactor is provided with a quench zone for cooling the metallic rhenium so as to yield rhenium nano and micro powders.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: March 22, 2011
    Assignee: Tekna Plasma Systems Inc.
    Inventors: Jerzy W. Jurewicz, Jiayin Guo
  • Publication number: 20090243168
    Abstract: The process for the synthesis of rhenium powders comprises the injection of ammonium perrhenate powder through a carrier gas in a plasma torch of a plasma reactor operated using a mixture including hydrogen as the plasma gas, yielding metallic rhenium under the following chemical reaction: 2NH4ReO4+4H2?2Re+N2?+8H2O?. The reactor is provided with a quench zone for cooling the metallic rhenium so as to yield rhenium nano and micro powders.
    Type: Application
    Filed: January 6, 2009
    Publication date: October 1, 2009
    Applicant: TEKNA PLASMA SYSTEMS INC.
    Inventors: Jerzy W. Jurewicz, Jiayin Guo
  • Patent number: 7501599
    Abstract: A process and apparatus for the synthesis of metal oxide nanopowder from a metal compound vapour is presented. In particular a process and apparatus for the synthesis of TiO2 nanopowder from TiCl4 is disclosed. The metal compound vapour is reacted with an oxidizing gas in electrically induced RF frequency plasma thus forming a metal oxide vapour. The metal oxide vapour is rapidly cooled using a highly turbulent gas quench zone which quickly halts the particle growth process, yielding a substantial reduction in the size of metal oxide particles formed compared with known processes. The metal compound vapour can also react with a doping agent to create a doped metal oxide nanopowder. Additionally, a process and apparatus for the inline synthesis of a coated metal oxide is disclosed wherein the metal oxide particles are coated with a surface agent after being cooled in a highly turbulent gas quench zone.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: March 10, 2009
    Assignee: Tekna Plasma Systems, Inc.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Christine A. Abdel Messih Nessim
  • Patent number: 7494527
    Abstract: The process for the synthesis of rhenium powders comprises the injection of ammonium perrhenate powder through a carrier gas in a plasma torch of a plasma reactor operated using a mixture including hydrogen as the plasma gas, yielding metallic rhenium under the following chemical reaction: 2 NH4ReO4+4 H2?2 Re+N2?+8 H2O?. The reactor is provided with a quench zone for cooling the metallic rhenium so as to yield rhenium nano and micro powders.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: February 24, 2009
    Assignee: Tekna Plasma Systems Inc.
    Inventors: Jerzy W. Jurewicz, Jiayin Guo
  • Patent number: 6994837
    Abstract: A process and apparatus for the synthesis of metal oxide nanopowder from a metal compound vapour is presented. In particular a process and apparatus for the synthesis of TiO2 nanopowder from TiCl4 is disclosed. The metal compound vapour is reacted with an oxidizing gas in electrically induced RF frequency plasma thus forming a metal oxide vapour. The metal oxide vapour is rapidly cooled using a highly turbulent gas quench zone which quickly halts the particle growth process, yielding a substantial reduction in the size of metal oxide particles formed compared with known processes. The metal compound vapour can also react with a doping agent to create a doped metal oxide nanopowder. Additionally, a process and apparatus for the inline synthesis of a coated metal oxide is disclosed wherein the metal oxide particles are coated with a surface agent after being cooled in a highly turbulent gas quench zone.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: February 7, 2006
    Assignee: Tekna Plasma Systems, Inc.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Christine A. Abdel Messih Nessim
  • Publication number: 20030143153
    Abstract: A process and apparatus for the synthesis of metal oxide nanopowder from a metal compound vapour is presented. In particular a process and apparatus for the synthesis of TiO2 nanopowder from TiCl4 is disclosed. The metal compound vapour is reacted with an oxidizing gas in electrically induced RF frequency plasma thus forming a metal oxide vapour. The metal oxide vapour is rapidly cooled using a highly turbulent gas quench zone which quickly halts the particle growth process, yielding a substantial reduction in the size of metal oxide particles formed compared with known processes. The metal compound vapour can also react with a doping agent to create a doped metal oxide nanopowder. Additionally, a process and apparatus for the inline synthesis of a coated metal oxide is disclosed wherein the metal oxide particles are coated with a surface agent after being cooled in a highly turbulent gas quench zone.
    Type: Application
    Filed: December 6, 2002
    Publication date: July 31, 2003
    Applicant: Tekna Plasma Systems, Inc.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Christine A. Abdel Messih Nessim
  • Publication number: 20020155059
    Abstract: A process and apparatus for the synthesis of metal oxide nanopowder from a metal compound vapour is presented. In particular a process and apparatus for the synthesis of TiO2 nanopowder from TiCl4 is disclosed. The metal compound vapour is reacted with an oxidizing gas in an electrically induced RF frequency plasma thus forming a metal oxide vapour. The metal oxide vapour is rapidly cooled using a highly turbulent gas quench zone which quickly halts the particle growth process, yielding a substantial reduction in the size of metal oxide particles formed. The metal compound vapour can also be reacted with a doping agent to create a doped metal oxide nanopowder. Additionally, a process and apparatus for the inline synthesis of a coated metal oxide is disclosed wherein the metal oxide particles are coated with a surface agent after being cooled in a highly turbulent gas quench zone.
    Type: Application
    Filed: April 24, 2001
    Publication date: October 24, 2002
    Applicant: Tekna Plasma Systems Inc.
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz, Christine A. Abdel Messih Nessim
  • Patent number: 5560844
    Abstract: A liquid film stabilized induction plasma torch comprises a cylindrical torch body made of cast ceramic or polymer-matrix composite, a coaxial cylindrical plasma confinement tube mounted inside the torch body, a gas distributor head secured to one end of the torch body to supply the confinement tube with gaseous substances, a cylindrical and coaxial induction coil embedded in the ceramic or polymer-matrix composite of the torch body, and a thin annular chamber separating the coaxial torch body and confinement tube. A high velocity cooling liquid flows through the thin annular chamber. The confinement tube is made of porous ceramic material through which cooling liquid from the annular chamber permeates. The permeating cooling liquid forms on the inner surface of the confinement tube a thin liquid film subjected to the high temperature of the plasma produced in the confinement tube.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: October 1, 1996
    Assignee: Universite de Sherbrooke
    Inventors: Maher I. Boulos, Jerzy W. Jurewicz