Patents by Inventor Nahid Mohajeri
Nahid Mohajeri 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: 11530992Abstract: A gas detection element for detection of a measurement target gas is provided. The gas detection element includes a gas detection layer including a chemochromic pigment; and a spacer. The spacer is permeable to the measurement target gas, is disposed on a first surface of the gas detection layer, and has an area smaller than an area of the gas detection layer.Type: GrantFiled: August 2, 2018Date of Patent: December 20, 2022Assignee: Nitto Denko CorporationInventors: Namiko Suzuki, Hiroyuki Higuchi, Koichi Nakamura, Masaya Nishigawara, Nahid Mohajeri
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Publication number: 20220091080Abstract: Described herein is an ammonia compound indicator comprising an adhesive and a chemochromic compound disposed therein. Also described are methods of making the aforedescribed elements and methods for indicating the presence of ammonia.Type: ApplicationFiled: January 17, 2020Publication date: March 24, 2022Applicant: NITTO DENKO CORPORATIONInventors: Koichi Nakamura, Nahid Mohajeri
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Patent number: 10996174Abstract: A gas sensing element includes a gas detection layer including a pigment, the gas detection layer including a first surface; and a backing material disposed on the first surface of the gas detection layer. When reducing gas causes the gas sensing element to change in color, a color change ?L* of the gas sensing element is greater than or equal to 5.Type: GrantFiled: February 17, 2018Date of Patent: May 4, 2021Assignee: Nitto Denko CorporationInventors: Koichi Nakamura, Nahid Mohajeri, Yu-chu Chen, Kujtim Bizati, Shinji Inokuchi, Namiko Suzuki, Hiroyuki Higuchi, Masahiko Hirose, Masaya Nishigawara
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Patent number: 10845314Abstract: A gas sensing element includes a gas detection layer including a chemochromic pigment, with modifications towards enhancing shelf-life performance and false detection performance before use. The gas detection layer has an adhesion of greater than or equal to 0.2 N/25 mm. Also described are methods of making the aforedescribed element to attain enhanced shelf-life performance and false detection performance.Type: GrantFiled: February 16, 2018Date of Patent: November 24, 2020Assignee: Nitto Denko CorporationInventors: Koichi Nakamura, Nahid Mohajeri, Yu-chu Chen, Kujtim Bizati, Shinji Inokuchi
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Publication number: 20200249174Abstract: A gas detection element for detection of a measurement target gas is provided. The gas detection element includes a gas detection layer including a chemochromic pigment; and a spacer. The spacer is permeable to the measurement target gas, is disposed on a first surface of the gas detection layer, and has an area smaller than an area of the gas detection layer.Type: ApplicationFiled: August 2, 2018Publication date: August 6, 2020Inventors: Namiko SUZUKI, Hiroyuki HIGUCHI, Koichi NAKAMURA, Masaya NISHIGAWARA, Nahid MOHAJERI
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Publication number: 20200124579Abstract: A gas detection system includes (1) an output device configured to output data acquired by monitoring a gas sensing element including a gas detection layer including a pigment; and (2) an information processing apparatus configured to process the data output by the output device, wherein the information processing apparatus includes a determining unit configured to determine whether the gas sensing element has detected gas, based on the data, and a display control unit configured to display, on an indication element, information indicating a position of the gas sensing element that has detected the gas or information indicating a status of gas leakage determined based on the data, when the determining unit determines that the gas sensing element has detected the gas.Type: ApplicationFiled: February 17, 2018Publication date: April 23, 2020Inventors: Koichi NAKAMURA, Nahid MOHAJERI, Yu-chu CHEN, Kujtim BIZATI, Shinji INOKUCHI, Namiko SUZUKI, Masahiko HIROSE, Masaya NISHIGAWARA, Hiroyuki HIGUCHI
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Publication number: 20200124538Abstract: A gas sensing element includes a gas detection layer including a chemochromic pigment, with modifications towards enhancing shelf-life performance and false detection performance before use. The gas detection layer has an adhesion of greater than or equal to 0.2 N/25 mm. Also described are methods of making the aforedescribed element to attain enhanced shelf-life performance and false detection performance.Type: ApplicationFiled: February 16, 2018Publication date: April 23, 2020Inventors: Koichi NAKAMURA, Nahid MOHAJERI, Yu-chu CHEN, Kujtim BIZATI, Shinji INOKUCHI
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Publication number: 20200003697Abstract: A gas sensing element includes a gas detection layer including a pigment, the gas detection layer including a first surface; and a backing material disposed on the first surface of the gas detection layer. When reducing gas causes the gas sensing element to change in color, a color change ?L* of the gas sensing element is greater than or equal to 5.Type: ApplicationFiled: February 17, 2018Publication date: January 2, 2020Inventors: Koichi NAKAMURA, Nahid MOHAJERI, Yu-chu CHEN, Kujtim BIZATI, Shinji INOKUCHI, Namiko SUZUKI, Hiroyuki HIGUCHI, Masahiko HIROSE, Masaya NISHIGAWARA
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Patent number: 9597675Abstract: An oxidation catalyst includes a support including particles of an alkaline earth salt, and first particles including a palladium compound on the support. The oxidation catalyst can also include precious metal group (PMG) metal particles in addition to the first particles intermixed together on the support. A gas permeable polymer that provides a continuous phase can completely encapsulate the particles and the support. The oxidation catalyst may be used as a gas sensor, where the first particles are chemochromic particles.Type: GrantFiled: March 5, 2014Date of Patent: March 21, 2017Assignee: University of Central Florida Research Foundation, Inc.Inventor: Nahid Mohajeri
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Patent number: 9228954Abstract: A method of detecting defects in membranes such as ion exchange membranes of electrochemical cells. The electrochemical cell includes an assembly having an anode side and a cathode side with the ion exchange membrane in between. In a configuration step a chemochromic sensor is placed above the cathode and flow isolation hardware lateral to the ion exchange membrane which prevents a flow of hydrogen (H2) between the cathode and anode side. The anode side is exposed to a first reactant fluid including hydrogen. The chemochromic sensor is examined after the exposing for a color change. A color change evidences the ion exchange membrane has at least one defect that permits H2 transmission therethrough.Type: GrantFiled: August 24, 2012Date of Patent: January 5, 2016Assignee: University of Central Florida Research Foundation, Inc.Inventors: Robert Paul Brooker, Nahid Mohajeri
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Publication number: 20150188175Abstract: A coated polymer membrane includes a polymer composite including a polymer material, a rare earth or transition metal compound modifier within at least a portion of a thickness of the polymer material. A median particles size of the compound modifier is between 20 nm and 150 nm. A precious metal group (PMG) metal or PMG metal alloy is coating both sides of the polymer composite.Type: ApplicationFiled: August 14, 2013Publication date: July 2, 2015Inventors: Benjamin P. Pearman, Marianne Rodgers, Nahid Mohajeri, Robert Paul Brooker, Darlene K. Slattery
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Publication number: 20140187410Abstract: An oxidation catalyst includes a support including particles of an alkaline earth salt, and first particles including a palladium compound on the support. The oxidation catalyst can also include precious metal group (PMG) metal particles in addition to the first particles intermixed together on the support. A gas permeable polymer that provides a continuous phase can completely encapsulate the particles and the support. The oxidation catalyst may be used as a gas sensor, where the first particles are chemochromic particles.Type: ApplicationFiled: March 5, 2014Publication date: July 3, 2014Applicant: University of Central Florida Research Foundation, Inc.Inventor: NAHID MOHAJERI
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Patent number: 8703642Abstract: A method of forming a supported oxidation catalyst includes providing a support comprising a metal oxide or a metal salt, and depositing first palladium compound particles and second precious metal group (PMG) metal particles on the support while in a liquid phase including at least one solvent to form mixed metal comprising particles on the support. The PMG metal is not palladium. The mixed metal particles on the support are separated from the liquid phase to provide the supported oxidation catalyst.Type: GrantFiled: October 24, 2013Date of Patent: April 22, 2014Assignee: University of Central Florida Research Foundation, Inc.Inventor: Nahid Mohajeri
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Publication number: 20140051567Abstract: A method of forming a supported oxidation catalyst includes providing a support comprising a metal oxide or a metal salt, and depositing first palladium compound particles and second precious metal group (PMG) metal particles on the support while in a liquid phase including at least one solvent to form mixed metal comprising particles on the support. The PMG metal is not palladium. The mixed metal particles on the support are separated from the liquid phase to provide the supported oxidation catalyst.Type: ApplicationFiled: October 24, 2013Publication date: February 20, 2014Applicant: University of Central Florida Research Foundation, Inc.Inventor: NAHID MOHAJERI
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Patent number: 8652993Abstract: A supported oxidation catalyst includes a support having a metal oxide or metal salt, and mixed metal particles thereon. The mixed metal particles include first particles including a palladium compound, and second particles including a precious metal group (PMG) metal or PMG metal compound, wherein the PMG metal is not palladium. The oxidation catalyst may also be used as a gas sensor.Type: GrantFiled: August 17, 2012Date of Patent: February 18, 2014Assignee: University of Central Florida Research Foundation, Inc.Inventor: Nahid Mohajeri
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Patent number: 8591818Abstract: A (H2) sensor composition includes a gas permeable matrix material intermixed and encapsulating at least one chemochromic pigment. The chemochromic pigment produces a detectable change in color of the overall sensor composition in the presence of H2 gas. The matrix material provides high H2 permeability, which permits fast permeation of H2 gas. In one embodiment, the chemochromic pigment comprises PdO/TiO2. The sensor can be embodied as a two layer structure with the gas permeable matrix material intermixed with the chemochromic pigment in one layer and a second layer which provides a support or overcoat layer.Type: GrantFiled: May 1, 2006Date of Patent: November 26, 2013Inventors: Gary Bokerman, Nahid Mohajeri, Nazim Muradov, Ali Tabatabaie-Raissi
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Publication number: 20130052745Abstract: A method of detecting defects in membranes such as ion exchange membranes of electrochemical cells. The electrochemical cell includes an assembly having an anode side and a cathode side with the ion exchange membrane in between. In a configuration step a chemochromic sensor is placed above the cathode and flow isolation hardware lateral to the ion exchange membrane which prevents a flow of hydrogen (H2) between the cathode and anode side. The anode side is exposed to a first reactant fluid including hydrogen. The chemochromic sensor is examined after the exposing for a color change. A color change evidences the ion exchange membrane has at least one defect that permits H2 transmission therethrough.Type: ApplicationFiled: August 24, 2012Publication date: February 28, 2013Applicant: University of Central Florida Research Foundation, Inc.Inventors: ROBERT PAUL BROOKER, NAHID MOHAJERI
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Publication number: 20130045858Abstract: A supported oxidation catalyst includes a support having a metal oxide or metal salt, and mixed metal particles thereon. The mixed metal particles include first particles including a palladium compound, and second particles including a precious metal group (PMG) metal or PMG metal compound, wherein the PMG metal is not palladium. The oxidation catalyst may also be used as a gas sensor.Type: ApplicationFiled: August 17, 2012Publication date: February 21, 2013Applicant: University of Central Florida Research Foundation, Inc.Inventor: Nahid Mohajeri
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Patent number: 7745027Abstract: A method of generating hydrogen includes the steps of providing an amine borane (AB) complex, at least one hydrogen generation catalyst, and a solvent, and mixing these components. Hydrogen is generated. The hydrogen produced is high purity hydrogen suitable for PEM fuel cells. A hydrolytic in-situ hydrogen generator includes a first compartment that contains an amine borane (AB) complex, a second container including at least one hydrogen generation catalyst, wherein the first or second compartment includes water or other hydroxyl group containing solvent. A connecting network permits mixing contents in the first compartment with contents in the second compartment, wherein high purity hydrogen is generated upon mixing. At least one flow controller is provided for controlling a flow rate of the catalyst or AB complex.Type: GrantFiled: September 21, 2007Date of Patent: June 29, 2010Assignee: University of Central Florida Research Foundation Inc.Inventors: Nahid Mohajeri, Gary Bokerman, Ali Tabatabaie-Raissi
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Patent number: 7578992Abstract: A method of generating hydrogen includes the steps of providing an amine borane (AB) complex, at least one hydrogen generation catalyst, and a solvent, and mixing these components Hydrogen is generated. The hydrogen produced is high purity hydrogen suitable for PEM fuel cells. A hydrolytic in-situ hydrogen generator includes a first compartment that contains an amine borane (AB) complex, a second container including at least one hydrogen generation catalyst, wherein the first or second compartment includes water or other hydroxyl group containing solvent. A connecting network permits mixing contents in the first compartment with contents in the second compartment, wherein high purity hydrogen is generated upon mixing. At least one flow controller is provided for controlling a flow rate of the catalyst or AB complex.Type: GrantFiled: September 28, 2007Date of Patent: August 25, 2009Assignee: University of Central Florida Research Foundation, Inc.Inventors: Nahid Mohajeri, Ali Tabatabaie-Raissi, Gary Bokerman