Patents by Inventor Heinz Fissan
Heinz Fissan 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).
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Patent number: 9222856Abstract: A system and method for characterizing a totality of particles selects a class of the totality of particles having a defined mobility; determines the total particle concentration of the class of particles; filters the class of particles using the filter apparatus and determines a filtered particle concentration indicative of the particles of the class which penetrate the filter apparatus; and determines at least one morphological parameter based on the fraction of particles of a class penetrating the filter apparatus.Type: GrantFiled: February 27, 2013Date of Patent: December 29, 2015Assignee: Regents of the University of MinnesotaInventors: Jing Wang, David Y. H. Pui, Heinz Fissan, Sheng-Chieh Chen
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Publication number: 20130174643Abstract: A system and method for characterizing a totality of particles selects a class of the totality of particles having a defined mobility; determines the total particle concentration of the class of particles; filters the class of particles using the filter apparatus and determines a filtered particle concentration indicative of the particles of the class which penetrate the filter apparatus; and determines at least one morphological parameter based on the fraction of particles of a class penetrating the filter apparatus.Type: ApplicationFiled: February 27, 2013Publication date: July 11, 2013Inventors: Jing Wang, David Y.H. Pui, Heinz Fissan, Sheng-Chieh Chen
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Patent number: 8181505Abstract: A method is proposed for characterizing a totality of particles. The method can be used in particular for characterizing microparticular or nanoparticular aerosols. The method comprises the following steps: a) in a classification step, a class of the totality is selected, wherein the particles of the selected class have a prespecified mobility dm; b) in a counting step, a number N of the particles of the selected class is determined; c) in a charge determination step, a charge Q of the particles of the selected class is determined; and d) in an evaluation step, at least one morphological parameter is determined from the charge Q, the number N and the mobility dm, wherein the morphological parameter comprises at least one item of information about an agglomerate state of the particles.Type: GrantFiled: February 6, 2009Date of Patent: May 22, 2012Assignees: BASF SE, Regents of The University of MinnesotaInventors: Michael Mertler, Bernd Sachweh, Markus Linsenbühler, Michael Schäfer, David Y. H. Pui, Heinz Fissan, Jing Wang, Weon Gyu Shin
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Patent number: 7812306Abstract: An instrument for non-invasively measuring nanoparticle exposure includes a corona discharge element generating ions to effect unipolar diffusion charging of an aerosol, followed by an ion trap for removing excess ions and a portion of the charged particles with electrical mobilities above a threshold. Downstream, an electrically conductive HEPA filter or other collecting element accumulates the charged particles and provides the resultant current to an electrometer amplifier. The instrument is tunable to alter the electrometer amplifier output toward closer correspondence with a selected function describing particle behavior, e.g. nanoparticle deposition in a selected region of the respiratory system. Tuning entails adjusting voltages applied to one or more of the ion trap, the corona discharge element and the collecting element. Alternatively, tuning involves adjusting the aerosol flow rate, either directly or in comparison to the flow rate of a gas conducting the ions toward merger with the aerosol.Type: GrantFiled: May 23, 2006Date of Patent: October 12, 2010Assignee: TSI, IncorporatedInventors: Heinz Fissan, Andreas Trampe, David Y. H. Pui, Stanley L. Kaufman
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Patent number: 7655945Abstract: An apparatus includes semiconductor processing equipment. A particle detecting integrated circuit is positioned in a vacuum environment, the particle detecting integrated circuit containing a device having a pair of conductive lines exposed to the vacuum environment. The pair of conductive lines is spaced at a critical pitch corresponding to diameters of particles of interest. A computer system is linked to the particle detecting integrated circuit to detect a change in an electrical property of the conductive lines when a particle becomes lodged between or on the lines.Type: GrantFiled: July 3, 2007Date of Patent: February 2, 2010Assignee: Regents of the University of MinnesotaInventors: David Y. Pui, Yi Liu, Christof Asbach, Heinz Fissan
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Publication number: 20090206820Abstract: An apparatus includes semiconductor processing equipment. A particle detecting integrated circuit is positioned in a vacuum environment, the particle detecting integrated circuit containing a device having a pair of conductive lines exposed to the vacuum environment. The pair of conductive lines is spaced at a critical pitch corresponding to diameters of particles of interest. A computer system is linked to the particle detecting integrated circuit to detect a change in an electrical property of the conductive lines when a particle becomes lodged between or on the lines.Type: ApplicationFiled: July 3, 2007Publication date: August 20, 2009Inventors: David Y. Pui, Yi Liu, Christof Asbach, Heinz Fissan
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Publication number: 20090199623Abstract: A method is proposed for characterizing a totality of particles (318). The method can be used in particular for charactering microparticular or nanoparticular aerosols. The method comprises the following steps: a) in a classification step, a class of the totality is selected, wherein the particles (318) of the selected class have a prespecified mobility dm; b) in a counting step, a number N of the particles (318) of the selected class is determined; c) in a charge determination step, a charge Q of the particles (318) of the selected class is determined; and d) in an evaluation step, at least one morphological parameter is determined from the charge Q, the number N and the mobility dm, wherein the morphological parameter comprises at least one item of information about an agglomerate state of the particles (318).Type: ApplicationFiled: February 6, 2009Publication date: August 13, 2009Applicants: BASF SE, University of MinnesotaInventors: Michael Mertler, Bernd Sachweh, Markus Linsenbuhler, Michael Schafer, David Y.H. Pui, Heinz Fissan, Jing Wang, Weon Gyu Shin
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Publication number: 20060284077Abstract: An instrument for non-invasively measuring nanoparticle exposure includes a corona discharge element generating ions to effect unipolar diffusion charging of an aerosol, followed by an ion trap for removing excess ions and a portion of the charged particles with electrical mobilities above a threshold. Downstream, an electrically conductive HEPA filter or other collecting element accumulates the charged particles and provides the resultant current to an electrometer amplifier. The instrument is tunable to alter the electrometer amplifier output toward closer correspondence with a selected function describing particle behavior, e.g. nanoparticle deposition in a selected region of the respiratory system. Tuning entails adjusting voltages applied to one or more of the ion trap, the corona discharge element and the collecting element. Alternatively, tuning involves adjusting the aerosol flow rate, either directly or in comparison to the flow rate of a gas conducting the ions toward merger with the aerosol.Type: ApplicationFiled: May 23, 2006Publication date: December 21, 2006Applicant: TSI IncorporatedInventors: Heinz Fissan, Andreas Trampe, David Pui, Stanley Kaufman
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Patent number: 7105042Abstract: An apparatus for separating aerosols or particles from a gas stream composed of a flow housing through which the gas containing the components to be separated flows, a separator, which is arranged in the flow housing, and a corona electrode, which is provided upstream of the separator in the direction of flow. The corona electrode is located substantially outside the gas flow. An air volume stream from the corona electrode flows into to the gas flow to transport charge carriers generated by the corona electrode into a charging zone in the flow housing.Type: GrantFiled: January 18, 2005Date of Patent: September 12, 2006Assignee: Mann & Hummel GmbHInventors: Manfred Tumbrink, Heinz Fissan, Frank Jordan, Christoph Kleinert
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Publication number: 20050235829Abstract: An apparatus for separating aerosols or particles from a gas stream composed of a flow housing through which the gas containing the components to be separated flows, a separator, which is arranged in the flow housing, and a corona electrode, which is provided upstream of the separator in the direction of flow. The corona electrode is located substantially outside the gas flow. An air volume stream from the corona electrode flows into to the gas flow to transport charge carriers generated by the corona electrode into a charging zone in the flow housing.Type: ApplicationFiled: January 18, 2005Publication date: October 27, 2005Applicant: Mann & Hummel GmbHInventors: Manfred Tumbrink, Heinz Fissan, Frank Jordan, Christoph Kleinert
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Patent number: 6230572Abstract: An apparatus for classifying polydisperse aerosols includes aerosol and sheath gas conduits for conducting a sample aerosol and a sheath gas toward a merger area. At the merger area the sheath gas and about ten percent of the sample aerosol merge, then travel through a differential mobility analyzer (DMA) and along a tubular electrode of the DMA. Selected particles, i.e. particles having electrical mobilities within a narrow range, pass through a collection aperture of the electrode. The DMA output, an aerosol consisting of the selected particles, is provided to a condensation particle counter or other device for determining the aerosol concentration. The remainder of the sample aerosol is conducted away from the merger area along a bypass flow conduit. The bypass flow and an improved aerodynamic design provide for a slit at the merger area that is sufficiently narrow to minimize unwanted electric field penetration at the slit and DMA entrance.Type: GrantFiled: February 12, 1999Date of Patent: May 15, 2001Assignee: TSI IncorporatedInventors: David Y. H. Pui, Da-Ren Chen, Frederick R. Quant, Gilmore J. Sem, Heinz Fissan, Detlef Hummes, Frank Dorman