Patents by Inventor Oskar Stephan

Oskar Stephan 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: 11933552
    Abstract: The invention relates to a heat exchanger for heating gas to a temperature in the range from 150 to 400° C., wherein the gas is heated by indirect heat transfer and all the surfaces of the walls of the heat exchanger which come into contact with the gas have been hot dip galvanized and the surfaces which come into contact with the gas, after the hot dip galvanization, have been heat treated at a temperature in the range from 400 to 750° C. The invention further relates to the use of the heat exchanger.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: March 19, 2024
    Assignee: BASF SE
    Inventors: Oskar Stephan, Karl-Friedrich Schneider, Matthias Weismantel
  • Patent number: 11535719
    Abstract: A process for producing superabsorbents, comprising the steps of i) classifying the superabsorbent particles by means of one or more sieves and ii) removing metallic impurities by means of one or more magnetic separators, wherein classification is accomplished using sieves made of a wire mesh, the wires of the wire mesh consist of a steel composed of at least 70% by weight of iron, at least 10% by weight of chromium and less than 2.5% by weight of nickel, and the throughput of superabsorbent particles in the magnetic separator is in the range from 2.0 to 6.5 g/s per cm2 of free cross-sectional area.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: December 27, 2022
    Assignee: BASF SE
    Inventors: Oskar Stephan, Gerald Gruenewald, Matthias Weismantel, Karl Possemiers, Monte Alan Peterson, Ruediger Funk, Sylvia Bertha, Tom Catternan
  • Publication number: 20220187034
    Abstract: The invention relates to a heat exchanger for heating gas to a temperature in the range from 150 to 400° C., wherein the gas is heated by indirect heat transfer and all the surfaces of the walls of the heat exchanger which come into contact with the gas have been hot dip galvanized and the surfaces which come into contact with the gas, after the hot dip galvanization, have been heat treated at a temperature in the range from 400 to 750° C. The invention further relates to the use of the heat exchanger.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 16, 2022
    Inventors: Oskar Stephan, Karl-Friedrich Schneider, Matthias Weismantel
  • Patent number: 11154832
    Abstract: The invention relates to a fluidizing plate, comprising a supporting structure and plate segments, the plate segments respectively having openings through which gas flows during operation. The plate segments are respectively releasably connected to the supporting structure and two neighboring plate segments respectively overlap and are releasably connected to one another in the region of the overlap. The invention also relates to an apparatus with such a fluidizing plate.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: October 26, 2021
    Assignee: BASF SE
    Inventors: Oskar Stephan, Reiner Giese, Egon Schmidt, Juergen Freiberg, Norbert Eugen Voll, Michael Laible
  • Patent number: 10928291
    Abstract: A method for the classification of superabsorber particles is disclosed, in which the superabsorber particles are put onto a top screen deck of a screening machine having at least two screen decks with a different hole size, the superabsorber particles which are smaller than the holes of the respective screen deck respectively falling through the holes and the superabsorber particles remaining on the screen deck being removed via an extraction point. Balls are positioned on each perforated plate, which balls are propelled upward by the movement of the perforated plate and strike from below the screen deck respectively lying above, wherein the balls have a stiffness in the range from 40 to 100 N/mm and a damping in the range from 1 to 4%. A machine for carrying out the method also is disclosed.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: February 23, 2021
    Assignee: BASF SE
    Inventors: Oskar Stephan, Norbert Eugen Voll, Rüdiger Funk
  • Patent number: 10845257
    Abstract: The invention relates to a device (14) and to a method for the contactless detection of a torque of a shaft (10) and/or torsional natural frequencies and/or torsional oscillations. The shaft (10) contains a ferromagnetic material. A measurement head (16) facing toward a shaft wall (12) comprises an excitation coil (22) which couples a magnetic field into the shaft (10). The measurement head (16) furthermore contains a number of measurement coils (24, 26, 28, 30), which measure the magnetic field emerging from the shaft (10).
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: November 24, 2020
    Assignee: BASF SE
    Inventors: Oskar Stephan, Roland Schuhmann, Tom Catternan
  • Publication number: 20200283588
    Abstract: A process for producing superabsorbents, comprising the steps of i) classifying the superabsorbent particles by means of one or more sieves and ii) removing metallic impurities by means of one or more magnetic separators, wherein classification is accomplished using sieves made of a wire mesh, the wires of the wire mesh consist of a steel composed of at least 70% by weight of iron, at least 10% by weight of chromium and less than 2.5% by weight of nickel, and the throughput of superabsorbent particles in the magnetic separator is in the range from 2.0 to 6.5 g/s per cm2 of free cross-sectional area.
    Type: Application
    Filed: October 9, 2018
    Publication date: September 10, 2020
    Inventors: Oskar Stephan, Gerald Gruenewald, Matthias Weismantel, Karl Possemiers, Monte Alan Peterson, Ruediger Funk, Sylvia Bertha, Tom Catternan
  • Publication number: 20200191206
    Abstract: A method for connecting functional elements (14) to a shaft (10, having the following steps: (a) forming elevations (12) for receiving the functional elements (14), said elevations (12) being machined out of the shaft (10) by removing material, and (b) welding the functional elements (14) to the elevations (12) on the shaft (10).
    Type: Application
    Filed: January 20, 2020
    Publication date: June 18, 2020
    Applicant: LIST TECHNOLOGY AG
    Inventor: Oskar Stephan
  • Publication number: 20200101433
    Abstract: The invention relates to a fluidizing plate, comprising a supporting structure and plate segments, the plate segments respectively having openings through which gas flows during operation. The plate segments are respectively releasably connected to the supporting structure and two neighboring plate segments respectively overlap and are releasably connected to one another in the region of the overlap. The invention also relates to an apparatus with such a fluidizing plate.
    Type: Application
    Filed: May 29, 2018
    Publication date: April 2, 2020
    Inventors: Oskar Stephan, Reiner Giese, Egon Schmidt, Juergen Freiberg, Norbert Eugen Voll, Michael Laible
  • Patent number: 10539191
    Abstract: A method for connecting functional elements (14) to a shaft (10, having the following steps: (a) forming elevations (12) for receiving the functional elements (14), said elevations (12) being machined out of the shaft (10) by removing material, and (b) welding the functional elements (14) to the elevations (12) on the shaft (10).
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: January 21, 2020
    Assignee: List Technology AG
    Inventor: Oskar Stephan
  • Patent number: 10197536
    Abstract: A method for detecting damage to a hollow shaft is disclosed. A sensor for transmitting and receiving a signal is positioned at an end face of the hollow shaft, a signal is transmitted and an echo of the signal is received, the signal propagation time from the time of transmitting the signal until receiving the echo is determined, and the signal propagation time is compared to a predetermined intended value, and with a warning being emitted in the case of a deviation.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: February 5, 2019
    Assignee: BASF SE
    Inventor: Oskar Stephan
  • Publication number: 20190003789
    Abstract: The invention relates to a heat exchanger for heating gas to a temperature in the range from 150 to 400° C., wherein the gas is heated by indirect heat transfer and all the surfaces of the walls of the heat exchanger which come into contact with the gas have been hot dip galvanized and the surfaces which come into contact with the gas, after the hot dip galvanization, have been heat treated at a temperature in the range from 400 to 750° C. The invention further relates to the use of the heat exchanger.
    Type: Application
    Filed: December 21, 2016
    Publication date: January 3, 2019
    Inventors: Oskar Stephan, Karl-Friedrich Schneider, Matthias Weismantel
  • Publication number: 20180306654
    Abstract: The invention relates to a device (14) and to a method for the contactless detection of a torque of a shaft (10) and/or torsional natural frequencies and/or torsional oscillations. The shaft (10) contains a ferromagnetic material. A measurement head (16) facing toward a shaft wall (12) comprises an excitation coil (22) which couples a magnetic field into the shaft (10). The measurement head (16) furthermore contains a number of measurement coils (24, 26, 28, 30), which measure the magnetic field emerging from the shaft (10).
    Type: Application
    Filed: November 2, 2016
    Publication date: October 25, 2018
    Inventors: Oskar Stephan, Roland Schuhmann, Tom Catterman
  • Publication number: 20180188149
    Abstract: A method for the classification of superabsorber particles is disclosed, in which the superabsorber particles are put onto a top screen deck of a screening machine having at least two screen decks with a different hole size, the superabsorber particles which are smaller than the holes of the respective screen deck respectively falling through the holes and the superabsorber particles remaining on the screen deck being removed via an extraction point. Balls are positioned on each perforated plate, which balls are propelled upward by the movement of the perforated plate and strike from below the screen deck respectively lying above, wherein the balls have a stiffness in the range from 40 to 100 N/mm and a damping in the range from 1 to 4%. A machine for carrying out the method also is disclosed.
    Type: Application
    Filed: June 29, 2016
    Publication date: July 5, 2018
    Inventors: Oskar Stephan, Norbert Eugen Voll, Rüdiger Funk
  • Patent number: 9737911
    Abstract: A method is described for operating machines (10) having moving parts and arranged jointly on a support (32), said parts being moved periodically with substantially the same frequency, and wherein the phase of an oscillation of one machine (10) in relation to the phase of an oscillation of a further machine (10) is controlled by shifting the phases with respect to one another such that the amplitude of an oscillation of a structural part, for example of the support (32), remains below a predefined maximum value.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: August 22, 2017
    Assignee: BASF SE
    Inventors: Oskar Stephan, Thomas Rosenberger
  • Patent number: 9486777
    Abstract: The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization, drying the resulting polymer gel on a through circulation belt dryer, crushing the dried polymer gel, pre-grinding, separating of incompletely dried particles with a perforated plate, grinding and classifying the resulting polymer particles.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: November 8, 2016
    Assignee: BASF SE
    Inventors: Monte Peterson, John Perry Guentzel, Gregory Boykin, Leo Van Miert, Rene Callot, Oskar Stephan, Rüdiger Funk, Matthias Weismantel
  • Patent number: 9415529
    Abstract: A method for operating an apparatus with at least one rotating shaft, the at least one rotating shaft comprising functional elements which act on material to be processed in the apparatus, the apparatus comprising a filling orifice and an outlet orifice with an adjustable lower edge, and material being conveyed continuously through the apparatus from the filling orifice to the outlet orifice, said method comprising the following steps: a) measuring load data for the at least one rotating shaft in order to determine shaft load, b) lowering the lower edge of the outlet orifice and/or reducing the quantity of material supplied if the shaft load exceeds a specified maximum load, or displacing the lower edge of the outlet orifice upwards and/or increasing the quantity of material supplied if the shaft load is less than a specified shaft load.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: August 16, 2016
    Assignee: BASF SE
    Inventors: Oskar Stephan, Monte Peterson
  • Patent number: 9382393
    Abstract: The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization and drying the resulting polymer gel on a through-circulation belt dryer having at the end of the belt in transport direction a means for guiding the dried polymer gel down towards a means for crushing the dried polymer gel.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: July 5, 2016
    Assignee: BASF SE
    Inventors: Norbert Eugen Voll, Oskar Stephan, Karl J. Possemiers, Matthias Weismantel, Rüdiger Funk, Monte Peterson, Leo Van Miert, Rene Callot
  • Publication number: 20160121369
    Abstract: A method is described for operating machines (10) having moving parts and arranged jointly on a support (32), said parts being moved periodically with substantially the same frequency, and wherein the phase of an oscillation of one machine (10) in relation to the phase of an oscillation of a further machine (10) is controlled by shifting the phases with respect to one another such that the amplitude of an oscillation of a structural part, for example of the support (32), remains below a predefined maximum value.
    Type: Application
    Filed: May 22, 2014
    Publication date: May 5, 2016
    Applicant: BASF SE
    Inventors: Oskar Stephan, Thomas Rosenberger
  • Publication number: 20150315343
    Abstract: The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization and drying the resulting polymer gel on a through-circulation belt dryer having at the end of the belt in transport direction a means for guiding the dried polymer gel down towards a means for crushing the dried polymer gel.
    Type: Application
    Filed: September 19, 2013
    Publication date: November 5, 2015
    Inventors: Norbert Eugen Voll, Oskar Stephan, Karl J. Possemiers, Matthias Weismantel, Rüdiger Funk, Monte Peterson, Leo Van Miert, Rene Callot