Patents by Inventor Hermann Wollnik

Hermann Wollnik 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: 10184914
    Abstract: In an ion separation space (15) between plate electrodes (11, 12), rod electrodes (16, 17) which are parallel to the plate electrodes as well as to each other are placed. An asymmetric pulse voltage is applied between the plate electrodes (11, 12), whereby high and low electric fields are alternately created within the ion separation space (15). A voltage obtained by adding an appropriate DC voltage to a voltage generated from the asymmetric pulse voltage by resistive division is applied to the rod electrodes (16, 17). At one point in time, since the outer edge of the rod electrodes (16, 17) has a predetermined potential, an electric field having curved equipotential surfaces bulging in the Y-axis direction is created within the space between those rod electrodes. Due to this electric field, ions carried by a buffer-gas flow move in zigzags, while experiencing a converging force in both X- and Y-axis directions.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: January 22, 2019
    Assignee: SHIMADZU CORPORATION
    Inventor: Hermann Wollnik
  • Publication number: 20180238831
    Abstract: In an ion separation space (15) between plate electrodes (11, 12), rod electrodes (16, 17) which are parallel to the plate electrodes as well as to each other are placed. An asymmetric pulse voltage is applied between the plate electrodes (11, 12), whereby high and low electric fields are alternately created within the ion separation space (15). A voltage obtained by adding an appropriate DC voltage to a voltage generated from the asymmetric pulse voltage by resistive division is applied to the rod electrodes (16, 17). At one point in time, since the outer edge of the rod electrodes (16, 17) has a predetermined potential, an electric field having curved equipotential surfaces bulging in the Y-axis direction is created within the space between those rod electrodes. Due to this electric field, ions carried by a buffer-gas flow move in zigzags, while experiencing a converging force in both X- and Y-axis directions.
    Type: Application
    Filed: March 9, 2015
    Publication date: August 23, 2018
    Applicant: SHIMADZU CORPORATION
    Inventor: Hermann WOLLNIK
  • Patent number: 9595432
    Abstract: A time-of-flight mass spectrometer (1) comprises an ion source a segmented linear ion device (10) for receiving sample ions supplied by the ion source and a time-of-flight mass analyzer for analyzing ions ejected from the segmented device. A trapping voltage is applied to the segmented device to trap ions initially into a group of two or more adjacent segments and subsequently to trap them in a region of the segmented device shorter than the group of segments. The trapping voltage may also be effective to provide a uniform trapping field along the length of the device (10).
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: March 14, 2017
    Assignee: SHIMADZU CORPORATION
    Inventors: Roger Giles, Michael Sudakov, Hermann Wollnik
  • Patent number: 9508535
    Abstract: An ion mobility spectrometer having an ion source for generating ions; an ion detector for recording ions, and a number of substantially flat diaphragm electrodes arranged substantially perpendicular to a straight system axis that passes through the apertures in said diaphragms, with the diaphragms being arranged in a series of cells with each cell including an entrances and an exit diaphragm and a short region in between. The exit diaphragm of one cell is identical to the entrance diaphragm of the next cell, and the cells of said ion mobility spectrometer are grouped into three parts: an ion-beam forming region, an ion analyzing region, and a decelerating ion gate.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: November 29, 2016
    Assignee: SHIMADZU CORPORATION
    Inventors: Hermann Wollnik, Gary A. Eiceman
  • Publication number: 20150221489
    Abstract: An ion mobility spectrometer having an ion source for generating ions; an ion detector for recording ions, and a number of substantially flat diaphragm electrodes arranged substantially perpendicular to a straight system axis that passes through the apertures in said diaphragms, with the diaphragms being arranged in a series of cells with each cell including an entrances and an exit diaphragm and a short region in between. The exit diaphragm of one cell is identical to the entrance diaphragm of the next cell, and the cells of said ion mobility spectrometer are grouped into three parts: an ion-beam forming region, an ion analyzing region, and a decelerating ion gate.
    Type: Application
    Filed: March 15, 2012
    Publication date: August 6, 2015
    Inventors: Hermann Wollnik, Gary A. Eiceman
  • Patent number: 8969795
    Abstract: A filter for a mass- or mobility-spectrometer that bars gases or vapors of a high-pressure ion source, as well as ions of high mobility and charged droplets, from entering an evacuated mass spectrometer or a mobility spectrometer at a lower pressure than the filter. The buffer gas of the high pressure ion source is blown into the volume of this filter directly or through tubes from where buffer gas and embedded ions are sucked through the aperture of a diaphragm or through an aperture of a capillary mainly from an “extraction volume” filled with a separately supplied clean gas, into which ions of interest are pushed by electric fields formed by electrodes that are substantially rotational symmetric around the “extraction volume” and a substantially flat electrode with respect to an axis of ion extraction and the end of the capillary and the end of a coaxial tube surrounding the capillary.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: March 3, 2015
    Assignee: Shimadzu Corporation
    Inventors: Hermann Wollnik, Alexander Tarassov, Gary A. Eiceman
  • Patent number: 8952325
    Abstract: A co-axial time-of-flight mass spectrometer having a longitudinal axis and first and second ion mirrors at opposite ends of the longitudinal axis. Ions enter the spectrometer along an input trajectory offset from the longitudinal axis and after one or more passes between the mirrors ions leave along an output trajectory offset from the longitudinal axis for detection by an ion detector. The input and output trajectories are offset from the longitudinal axis by an angle no greater than formula (I): where Dmin is the or the minimum transverse dimension of the ion mirror and L is the distance between the entrances of the ion mirrors.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: February 10, 2015
    Assignee: Shimadzu Corporation
    Inventors: Roger Giles, Michael Sudakov, Hermann Wollnik
  • Patent number: 8809775
    Abstract: A curtain-gas filter for a mass- or mobility-spectrometer that bars gases or vapors of a high-flux atmospheric pressure ion source, as we ions of high mobility and charged droplets, from entering an evacuated mass spectrometer or a mobility spectrometer that is at a lower pressure than the main filter volume of the curtain-gas filter. A portion of the ion-source buffer gas in the ion-source plume is sucked through an ion-source buffer gas inlet into the main filter volume of the curtain-gas filter, from where this ion-source gas is exhausted after a properly shaped electric field has pushed a large portion of the embedded ions into an externally provided stream of a clean buffer gas, which is sucked through a passage into a mass- or mobility-spectrometer that is at a lower pressure.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: August 19, 2014
    Assignee: Shimadzu Corporation
    Inventor: Hermann Wollnik
  • Publication number: 20130140456
    Abstract: A curtain-gas filter for a mass- or mobility-spectrometer that bars gases or vapors of a high-flux atmospheric pressure ion source, as we ions of high mobility and charged droplets, from entering an evacuated mass spectrometer or a mobility spectrometer that is at a lower pressure than the main filter volume of the curtain-gas filter. A portion of the ion-source buffer gas in the ion-source plume is sucked through an ion-source buffer gas inlet into the main filter volume of the curtain-gas filter, from where this ion-source gas is exhausted after a properly shaped electric field has pushed a large portion of the embedded ions into an externally provided stream of a clean buffer gas, which is sucked through a passage into a mass- or mobility-spectrometer that is at a lower pressure.
    Type: Application
    Filed: August 10, 2010
    Publication date: June 6, 2013
    Applicant: SHIMADZU CORPORATION
    Inventor: Hermann Wollnik
  • Patent number: 8138474
    Abstract: A method for differential mobility separation of ions using digital-drive based high voltage fast switching electronics. The digital waveform delivered to the spectrometer is characterized by at least two substantially rectangular pulses of different amplitude and polarity. The control circuitry allows for waveform frequency, duty cycle and pulse amplitudes to be varied independently. Balanced as well as unbalanced asymmetric waveforms can be designed for optimum differential mobility separation of ions. The digital drive is designed for differential mobility spectrometers including parallel plate and segmented plate multipoles of planar symmetry, as well as multipoles of cylindrical symmetry, which may optionally be arranged in series. The use of the digital drive establishes alternating electric fields during which the displacement as a result of ion oscillation is determined by mobility coefficients.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: March 20, 2012
    Assignee: Shimadzu Corporation
    Inventors: Hermann Wollnik, Gary Eiceman, Dimitrios Papanastasiou
  • Patent number: 8067747
    Abstract: A system for guiding an ion beam along an axis (Z), comprises at least one section having upper flat plate strip electrodes (Iu, 2u, 3u, 4u and 5u) and lower flat plate strip electrodes (Id, 2d, 3d, 4d and 5d) for producing at least one electric field of substantially symmetric in a parallel direction and substantially antisymmetric in a perpendicular direction with respect to a plane including a beam axis and a fringe-field boundary that is located at the end of the at least one section.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: November 29, 2011
    Assignee: Shimadzu Corporation
    Inventor: Hermann Wollnik
  • Patent number: 8013296
    Abstract: Ions and charged droplets move from the nozzle (6) towards the orifice (22) of a charged-particle transport device or the desolvation pipe (7). This particle motion is governed by the distribution of the pseudo-potential along particle trajectories. There are RF-voltages applied to neighboring electrodes (241-246) of the electrode array (24) cause the charged particles to substantially hover above the electrode array (24). Right before the ions come to the electrode array (24) they thus experience a repelling force “F” perpendicular to the surface of the electrode array (24). This force “F” causes an effective barrier (B) right before the electrode array (24) and consequently a pseudo-potential well (A) where the charged particles stop their motion parallel to the plume axis (D). Thus they accumulate around the center line (C) of this well (A).
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: September 6, 2011
    Assignee: Shimadzu Corporation
    Inventors: Hermann Wollnik, Yoshihiro Ueno
  • Patent number: 8010773
    Abstract: Restricting execution by a computing device of instructions within an application program. The application program is modified such that execution of the selected instructions is dependent upon a corresponding expected state of one or more hardware components in the computing device. In an embodiment, the application program is modified to place the hardware components in the expected states prior to execution of the corresponding selected instructions. Creating the dependency on the hardware components prevents the unintended or malicious execution of the selected instructions.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: August 30, 2011
    Assignee: Microsoft Corporation
    Inventors: Hakki Tunc Bostanci, Nathan Jeffrey Ide, Matthias Hermann Wollnik, John Richard McDowell, Karan Singh Dhillon, Aaron Payne Goldsmid
  • Publication number: 20110174966
    Abstract: A filter for a mass- or mobility-spectrometer that bars gases or vapors of a high-pressure ion source, as well as ions of high mobility and charged droplets, from entering an evacuated mass spectrometer or a mobility spectrometer at a lower pressure than the filter. The buffer gas of the high pressure ion source is blown into the volume of this filter directly or through tubes from where buffer gas and embedded ions are sucked through the aperture of a diaphragm or through an aperture of a capillary mainly from an “extraction volume” filled with a separately supplied clean gas, into which ions of interest are pushed by electric fields formed by electrodes that are substantially rotational symmetric around the “extraction volume” and a substantially flat electrode with respect to an axis of ion extraction and the end of the capillary and the end of a coaxial tube surrounding the capillary.
    Type: Application
    Filed: September 17, 2009
    Publication date: July 21, 2011
    Applicant: SHIMADZU CORPORATION
    Inventors: Hermann Wollnik, Alexander Tarassov, Gary A. Eiceman
  • Publication number: 20110057094
    Abstract: A method for differential mobility separation of ions using digital-drive based high voltage fast switching electronics. The digital waveform delivered to the spectrometer is characterized by at least two substantially rectangular pulses of different amplitude and polarity. The control circuitry allows for waveform frequency, duty cycle and pulse amplitudes to be varied independently. Balanced as well as unbalanced asymmetric waveforms can be designed for optimum differential mobility separation of ions. The digital drive is designed for differential mobility spectrometers including parallel plate and segmented plate multipoles of planar symmetry, as well as multipoles of cylindrical symmetry, which may optionally be arranged in series. The use of the digital drive establishes alternating electric fields during which the displacement as a result of ion oscillation is determined by mobility coefficients.
    Type: Application
    Filed: November 15, 2010
    Publication date: March 10, 2011
    Applicant: SHIMADZU CORPORATION
    Inventors: Hermann WOLLNIK, Gary Alan EICEMAN, Dimitrios PAPANASTASIOU
  • Patent number: 7863562
    Abstract: A method for differential mobility separation of ions using digital-drive based high voltage fast switching electronics. The digital waveform delivered to the spectrometer is characterized by at least two substantially rectangular pulses of different amplitude and polarity. The control circuitry allows for waveform frequency, duty cycle and pulse amplitudes to be varied independently. Balanced as well as unbalanced asymmetric waveforms can be designed for optimum differential mobility separation of ions. The digital drive is designed for differential mobility spectrometers including parallel plate and segmented plate multipoles of planar symmetry, as well as multipoles of cylindrical symmetry, which may optionally be arranged in series. The use of the digital drive establishes alternating electric fields during which the displacement as a result of ion oscillation is determined by mobility coefficients.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: January 4, 2011
    Assignee: Shimadzu Corporation
    Inventors: Hermann Wollnik, Gary Eiceman, Dimitrios Papanastasiou
  • Patent number: 7772548
    Abstract: An ion mobility analyzer includes at least one of a “differential mobility analyzer”, an “ion mobility spectrometer” and a “differential mobility spectrometer”, to which charged molecules of interest are fed. Ions are fed to the ion mobility analyzer from a “droplet pickup ion source” including an electrospray ion source at a capillary end, from which charged droplets formed from a solvent mixture having substantially none of the molecules of interest emerge. The charged droplets are pulled by an electric field into a “pickup region” filled with a buffer gas at a pressure or a region close to the surface of a sample, where the charged droplets incorporate the molecules of interest and transfer the charge of the charged droplets to the molecules of interest, when the liquid in the charged droplets has evaporated in a heated desolvation region that is separate or integral with respect to the “pickup region”.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: August 10, 2010
    Assignee: Shimadzu Corporation
    Inventor: Hermann Wollnik
  • Publication number: 20100148062
    Abstract: Ions and charged droplets move from the nozzle (6) towards the orifice (22) of a charged-particle transport device or the desolvation pipe (7). This particle motion is governed by the distribution of the pseudo-potential along particle trajectories. There are RF-voltages applied to neighboring electrodes (241-246) of the electrode array (24) cause the charged particles to substantially hover above the electrode array (24). Right before the ions come to the electrode array (24) they thus experience a repelling force “F” perpendicular to the surface of the electrode array (24). This force “F” causes an effective barrier (B) right before the electrode array (24) and consequently a pseudo-potential well (A) where the charged particles stop their motion parallel to the plume axis (D). Thus they accumulate around the center line (C) of this well (A).
    Type: Application
    Filed: May 21, 2007
    Publication date: June 17, 2010
    Applicant: Shimadzu Corporation
    Inventors: Hermann Wollnik, Yoshiriro Ueno
  • Publication number: 20100072362
    Abstract: A time-of-flight mass spectrometer (1) comprises an ion source a segmented linear ion device (10) for receiving sample ions supplied by the ion source and a time-of-flight mass analyser for analysing ions ejected from the segmented device. A trapping voltage is applied to the segmented device to trap ions initially into a group of two or more adjacent segments and subsequently to trap them in a region of the segmented device shorter than the group of segments. The trapping voltage may also be effective to provide a uniform trapping field along the length of the device (10).
    Type: Application
    Filed: December 7, 2007
    Publication date: March 25, 2010
    Inventors: Roger Giles, Michael Sudakov, Hermann Wollnik
  • Publication number: 20100072363
    Abstract: A co-axial time-of-flight mass spectrometer having a longitudinal axis and first and second ion mirrors at opposite ends of the longitudinal axis. Ions enter the spectrometer along an input trajectory offset from the longitudinal axis and after one or more passes between the mirrors ions leave along an output trajectory offset from the longitudinal axis for detection by an ion detector. The input and output trajectories are offset from the longitudinal axis by an angle no greater than formula (I): where Dmin is the or the minimum transverse dimension of the ion mirror and L is the distance between the entrances of the ion mirrors.
    Type: Application
    Filed: December 7, 2007
    Publication date: March 25, 2010
    Inventors: Roger Giles, Michael Sudakov, Hermann Wollnik