Patents by Inventor Kambiz Pourrezaei
Kambiz Pourrezaei 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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Publication number: 20210068662Abstract: Methods and systems are disclosed for remotely and/or automatically controlling a probe to measure signals.Type: ApplicationFiled: April 2, 2019Publication date: March 11, 2021Applicant: UNIVERSITY OF ALASKA FAIRBANKSInventors: Zeinab Barati, Kambiz Pourrezaei
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Patent number: 9814339Abstract: In described embodiments, the present invention is a cup assembly including a cup holder having a base having a microcontroller, weight sensor and accelerometer incorporated therein, a handle extending upwardly from the base, and a camera support extending upwardly from the base. The camera support supports a digital camera. The digital camera is electronically coupled to the microcontroller. A cup is removably insertable into the cup holder. A method of using the cup assembly is also disclosed.Type: GrantFiled: July 31, 2014Date of Patent: November 14, 2017Assignee: Drexel UniversityInventors: Rose Ann DiMaria-Ghalili, Kambiz Pourrezaei, Ahmad Pourshoghi
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Publication number: 20160166096Abstract: In described embodiments, the present invention is a cup assembly including a cup holder having a base having a microcontroller, weight sensor and accelerometer incorporated therein, a handle extending upwardly from the base, and a camera support extending upwardly from the base. The camera support supports a digital camera. The digital camera is electronically coupled to the microcontroller. A cup is removably insertable into the cup holder. A method of using the cup assembly is also disclosed.Type: ApplicationFiled: July 31, 2014Publication date: June 16, 2016Applicant: DREXEL UNIVERSITYInventors: Rose Ann DiMaria-Ghalili, Kambiz Pourrezaei, Ahmad Pourshoghi
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Patent number: 9086380Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.Type: GrantFiled: September 13, 2013Date of Patent: July 21, 2015Assignee: Drexel UniversityInventors: Som Tyagi, Kambiz Pourrezaei
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Publication number: 20150025342Abstract: Optical changes of tissue during wound healing measured by Near Infrared and Diffuse Reflectance Spectroscopy are shown to correlate with histologic changes. Near Infrared absorption coefficient correlated with blood vessel in-growth over time, while Diffuse Reflectance Spectroscopy (DRS) data correlated with collagen concentration. Changes of optical properties of wound tissue at greater depths are also quantified by Diffuse Photon Density Wave (DPDW) methodology at near infrared wavelengths. The diffusion equation for semi-infinite media is used to calculate the absorption and scattering coefficients based on measurements of phase and amplitude with a frequency domain or time domain device. An increase in the absorption and scattering coefficients and a decrease in blood saturation of the wounds compared to the non wounded sites was observed. The changes correlated with the healing stage of the wound.Type: ApplicationFiled: August 6, 2014Publication date: January 22, 2015Inventors: Elisabeth S. Papazoglou, Michael S. Weingarten, Leonid Zubkov, Michael T. Neidrauer, Linda Zhu, Kambiz Pourrezaei
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Publication number: 20140303464Abstract: Disclosed are methods and devices for measuring a state of anesthesia in a noninvasive manner. Optical techniques may be used to measure changes in a functional near-infrared (fNIR) signal, where the fNIR signal is received in response to directing wavelengths of light in a near-infrared range on a patient. The optical density change may be used to obtain a change in deoxyhemoglobin (deoxy-Hb) concentration and/or a change in an oxyhemoglobin concentration (oxy-Hb). The changes in the deoxy-Hb and/or the oxy-Hb may then be compared to determine a state of anesthesia. The effect of artifacts (e.g., strong surgery room lighting, patient-table tilting, patient intubation/extubation) on the fNIR signal may be removed using a noise removal algorithm. In selecting the noise removal algorithm, a switching technique may be used to select the component analysis algorithm, such as a principal component analysis (PCA), an independent component analysis (ICA), or the like.Type: ApplicationFiled: June 17, 2014Publication date: October 9, 2014Inventors: Kurtulus IZZETOGLU, Kambiz POURREZAEI, Banu ONARAL, Jay Charles HORROW, Meltem Alkan IZZETOGLU, Scott C. Bunce
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Patent number: 8812083Abstract: Optical changes of tissue during wound healing measured by Near Infrared and Diffuse Reflectance Spectroscopy are shown to correlate with histologic changes. Near Infrared absorption coefficient correlated with blood vessel in-growth over time, while Diffuse Reflectance Spectroscopy (DRS) data correlated with collagen concentration. Changes of optical properties of wound tissue at greater depths are also quantified by Diffuse Photon Density Wave (DPDW) methodology at near infrared wavelengths. The diffusion equation for semi-infinite media is used to calculate the absorption and scattering coefficients based on measurements of phase and amplitude with a frequency domain or time domain device. An increase in the absorption and scattering coefficients and a decrease in blood saturation of the wounds compared to the non wounded sites was observed. The changes correlated with the healing stage of the wound.Type: GrantFiled: April 21, 2009Date of Patent: August 19, 2014Assignees: Philadelphia Health & Education Corporation, Drexel UniversityInventors: Elisabeth S. Papazoglou, Leonid Zubkov, Michael T. Neidrauer, Linda Zhu, Kambiz Pourrezaei, Michael S. Weingarten
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Patent number: 8798701Abstract: Disclosed are methods and devices for measuring a state of anesthesia in a noninvasive manner. Optical techniques may be used to measure changes in a functional near-infrared (fNIR) signal, where the fNIR signal is received in response to directing wavelengths of light in a near-infrared range on a patient. The optical density change may be used to obtain a change in deoxyhemoglobin (deoxy-Hb) concentration and/or a change in an oxyhemoglobin concentration (oxy-Hb). The changes in the deoxy-Hb and/or the oxy-Hb may then be compared to determine a state of anesthesia. The effect of artifacts (e.g., strong surgery room lighting, patient-table tilting, patient intubation/extubation) on the fNIR signal may be removed using a noise removal algorithm. In selecting the noise removal algorithm, a switching technique may be used to select the component analysis algorithm, such as a principal component analysis (PCA), an independent component analysis (ICA), or the like.Type: GrantFiled: September 30, 2009Date of Patent: August 5, 2014Assignees: Drexel University, Philadelphia Health & Education CorporationInventors: Kurtulus Izzetoglu, Kambiz Pourrezaei, Banu Onaral, Jay Charles Horrow, Meltem Alkan Izzetoglu, Scott C. Bunce
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Publication number: 20140017448Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.Type: ApplicationFiled: September 13, 2013Publication date: January 16, 2014Applicant: DREXEL UNIVERSITYInventors: Som TYAGI, Kambiz POURREZAEI
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Patent number: 8559002Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink. The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.Type: GrantFiled: March 20, 2009Date of Patent: October 15, 2013Assignee: Drexel UniversityInventors: Som Tyagi, Kambiz Pourrezaei
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Publication number: 20130225953Abstract: Functional near infrared spectroscopy (fNIRS) imaging is utilized to measure the influence of stimulation in real time. An fNIRS imaging device is integrated into a transcranial direct current stimulation (tDCS) stimulator by embedding fNIRS optodes on the tDCS stimulating electrodes. During tDCS stimulation, blood oxygenation levels are measured. For example, concentrations of oxyhemoglobin and deoxyhemoglobin are measured and compared to the concentrations of a baseline resting state to provide feedback on the efficacy of tDCS. Based on the feedback, a tDCS threshold and a dose-response relation for a particular subject can be quantified, and individualized stimulation parameters can be determined for the particular subject.Type: ApplicationFiled: February 25, 2011Publication date: August 29, 2013Applicants: FUNDACION HOSPITAL NACIONAL DE PARAPLEJICOS, DREXEL UNIVERSITYInventors: Antonio Oliviero, Guglielmo Foffani, Ivan Panyavin, Laura Mordillo-Mateos, Juan De Los Reyes Aguilar Lepe, Anna Merzagora, Kambiz Pourrezaei, Mauricio Rodriguez
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Patent number: 8346331Abstract: Functional near-infrared (fNIR) neuroimaging is used to assess credibility, detect deception, and implement a query methodology for determining deception via neuroimaging. Oxygenation levels of portions of the brain are imaged via fNIR spectroscopy and utilized to determine if the subject is telling a lie or a truth. In an example configuration, oxygenation levels in the inferior and/or middle prefrontal cortical areas of the brain, such as the bilateral dorsolateral prefrontal and/or inferior frontal cortex, are measured to determine if a subject is lying relative to telling the truth. An example system includes a portable, flexible, belt like sensing device that is positioned proximate the subjects scalp. Sensed neural activity is transmitted either through wired or wireless means, to a processor for analysis of the sensed neural activity. The query methodology utilizes an attestation assertion that mitigates variance in brain responses due to the length or form of a question.Type: GrantFiled: April 18, 2008Date of Patent: January 1, 2013Assignees: Drexel University, Philadelphia Health & Education CorporationInventors: Scott C. Bunce, Ajit Devaraj, Meltem Alkan Izzetoglu, Banu Onaral, Kurtulus Izzetoglu, Kambiz Pourrezaei
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Publication number: 20110124987Abstract: Optical changes of tissue during wound healing measured by Near Infrared and Diffuse Reflectance Spectroscopy are shown to correlate with histologic changes. Near Infrared absorption coefficient correlated with blood vessel in-growth over time, while Diffuse Reflectance Spectroscopy (DRS) data correlated with collagen concentration. Changes of optical properties of wound tissue at greater depths are also quantified by Diffuse Photon Density Wave (DPDW) methodology at near infrared wavelengths. The diffusion equation for semi-infinite media is used to calculate the absorption and scattering coefficients based on measurements of phase and amplitude with a frequency domain or time domain device. An increase in the absorption and scattering coefficients and a decrease in blood saturation of the wounds compared to the non wounded sites was observed. The changes correlated with the healing stage of the wound.Type: ApplicationFiled: April 21, 2009Publication date: May 26, 2011Inventors: Elisabeth S. Papazoglou, Michael S. Weingarten, Leonid Zubkov, Michael T. Neidrauer, Linda Zhu, Kambiz Pourrezaei
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Publication number: 20110026019Abstract: A method for the formation of surface enhanced Raman scattering substrates. The method produces thin substrates that have a nanoparticle ink deposited thereon. The nanoparticle ink may be any suitable nanoparticle ink such as silver, gold or copper nanoparticle ink which includes stabilized nanoparticles. The substrates and nanoparticle ink undergo a first step of heating in order to remove liquid vehicle from the ink. The substrates and nanoparticles then undergo a second step of heating for an amount of time sufficient to remove a substantial portion of the stabilizer and provide a fractal aggregate nanoparticle layer on the substrate having a certain resistivity or conductivity suitable for Raman scattering. This creates SERS substrates with enhanced amplification properties.Type: ApplicationFiled: March 20, 2009Publication date: February 3, 2011Applicant: DREXEL UNIVERSITYInventors: Som Tyagi, Kambiz Pourrezaei
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Publication number: 20100130367Abstract: The present invention includes a method of using one or more biomarkers to identify individuals with inflammatory disease using Quantum Dots conjugated to targeting moieties that will specifically bind to biomarker proteins or nucleic acids encoding the biomarker, where detection of the biomarker is associated with the inflammatory disease.Type: ApplicationFiled: July 11, 2007Publication date: May 27, 2010Applicant: Drexel UniversityInventors: Sreekant Murthy, Elisabeth S. Papazoglou, Kambiz Pourrezaei, Som Tyagi, Amolkumar Karwa
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Publication number: 20080306365Abstract: Functional near-infrared (fNIR) neuroimaging is used to assess credibility, detect deception, and implement a query methodology for determining deception via neuroimaging. Oxygenation levels of portions of the brain are imaged via fNIR spectroscopy and utilized to determine if the subject is telling a lie or a truth. In an example configuration, oxygenation levels in the inferior and/or middle prefrontal cortical areas of the brain, such as the bilateral dorsolateral prefrontal and/or inferior frontal cortex, are measured to determine if a subject is lying relative to telling the truth. An example system includes a portable, flexible, belt like sensing device that is positioned proximate the subjects scalp. Sensed neural activity is transmitted either through wired or wireless means, to a processor for analysis of the sensed neural activity. The query methodology utilizes an attestation assertion that mitigates variance in brain responses due to the length or form of a question.Type: ApplicationFiled: April 18, 2008Publication date: December 11, 2008Inventors: Scott C. Bunce, Ajit Devaraj, Meltem Izzetoglu, Banu Onaral, Kurtulus Izzetoglu, Kambiz Pourrezaei
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Patent number: 6204669Abstract: The invention includes apparatus and method for detecting defects in various barrier materials including surgical gloves and food packaging. Voltage is applied across electrodes and a barrier material and the voltage measured and compared with voltage control measurements for the same barrier material without a defect. Sensitivity of measurements is increased by adjusting partial pressure across the barrier material which is subjected to the passage of an ionized gas detected by suitable instrumentation.Type: GrantFiled: July 2, 1998Date of Patent: March 20, 2001Assignee: Drexel UniversityInventors: Richard B. Beard, Kambiz Pourrezaei, Shengke Zeng, Frederick Prout, Frank M. Kepics, Jin Park, Allen Rothwarf, Siddharth Deliwala, Robert Schmukler
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Patent number: 5685961Abstract: Catheters and other medical devices include plural layers of metals applied to the outer surfaces, which tend to close minuscule cracks through which corrosion may attack the underlying support. In some avatars, the initial layer of material is preferably silver, applied following specific preparation steps. In other embodiments, succeeding layers of metal completely cover the initial layer, and are also of silver. The succeeding layers are deposited after deposition of the prior layer, and tend to reduce the incidence of microscopic pores or cracks and are less prone to delamination. The succeeding layers are preferably of mutually different metals between layers. In a particular avatar, in which the exposed metals are oligodynamic silver and more noble platinum, the exposed silver layer lies over a portion of the platinum layer, to thereby prevent corrosion of the silver layer from disconnecting portions of the silver layer.Type: GrantFiled: March 27, 1992Date of Patent: November 11, 1997Assignee: P & D Medical Coatings, Inc.Inventors: Kambiz Pourrezaei, Richard Burnham Beard, Raymond Leon Boxman, Irina Shvets, Mark DeLaurentis
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Patent number: 5295979Abstract: A urinary catheter and system includes a catheter with a drain lumen which is coated with oligodynamic metal and preferably arranged with a coating of a more noble metal for creating an iontophoretic galvanic couple, which drives antimicrobial ions into solution. The exterior of the catheter is also coated in a similar manner to inhibit microbes migrating toward the bladder along the outer surface of the catheter. The system includes a flow rate control device which may be a one-way valve, a filter or both. A collection bag is coupled to the control device. The interconnecting hoses, the flow rate control device(s) and the collection bag are also coated on the interior with oligodynamic metal, preferably silver, and also with a more noble metal, preferably platinum.Type: GrantFiled: March 27, 1992Date of Patent: March 22, 1994Assignee: P & D Medical Coatings, Inc.Inventors: Mark DeLaurentis, Kambiz Pourrezaei, Raymond L. Boxman, Richard B. Beard