Patents by Inventor Bogdan Catalin Serban
Bogdan Catalin Serban 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: 20150022491Abstract: The present disclosure relates to a touch sensor and touch sensitive display having a plurality of first and second conductive lines arranged substantially orthogonally with a sensing material to sense a change in capacitance between them. The first and second conductive lines and the sensing material defining an array of sensitive transistors.Type: ApplicationFiled: July 16, 2014Publication date: January 22, 2015Inventors: Viorel Georgel Dumitru, Stefan Dan Costea, Ion Georgescu, Mihai Brezeanu, Bogdan-Catalin Serban
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Patent number: 8778501Abstract: A fluorescence based oxygen sensor can be prepared comprising a polyaniline polymer doped with one or more pyrene carboxylic acids. The polyaniline has the formula: and the pyrene carboxylic acids have the formula: Pyrene-R—COOH??(II); wherein R is an aliphatic linking group having 1 to 11 carbon atoms, n represents half the degree of polymerization, x is about 0.5, and (1?x) is about 0.5. The sensor can be coated onto a support. Upon excitation with an appropriate wavelength, the polyaniline/pyrene coating fluoresces. Upon exposure to oxygen the fluorescence rapidly decays.Type: GrantFiled: December 1, 2011Date of Patent: July 15, 2014Assignee: Honeywell International Inc.Inventors: Bogdan Catalin Serban, Mihai N. Mihaila, Octavian Buiu
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Patent number: 8747750Abstract: A fluorescence quenching based oxygen sensor can be prepared comprising a polystyrene polymer linked to pyrene. The fluorescence based sensor has the formula (I), Polystyrene-Y—R-Pyrene??(I); wherein Y is fluorescence quenching and R is an aliphatic linking group having 1 to 11 carbon atoms. The sensor can be coated onto a support and integrated with an LED excitation source and fluorescence detector.Type: GrantFiled: December 1, 2011Date of Patent: June 10, 2014Assignee: Honeywell International Inc.Inventors: Bogdan Catalin Serban, Mihai N. Mihaila, Octavian Buiu
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Patent number: 8710354Abstract: A solar cell may include a light sensitive molecule such as a hyperpolarizable molecule. In one example, a solar cell may include a layer of hyperpolarizable molecules disposed between a p-type electrode and an n-type electrode. In some cases, at least some of the hyperpolarizable molecules may include an electron donating group that is bonded or otherwise linked to the n-type electrode as well as an electron accepting group that is bonded or otherwise linked to the p-type electrode. In some instances, at least some of the hyperpolarizable molecules may include an electron donating group that is bonded or otherwise linked to the p-type electrode as well as an electron accepting group that is bonded or otherwise linked to the n-type electrode.Type: GrantFiled: December 17, 2008Date of Patent: April 29, 2014Assignee: Honeywell International Inc.Inventors: Mihai N. Mihaila, Bogdan Catalin Serban, Viorel Georgel Dumitru, Mircea Bercu, Cazimir Bostan, Stephan Dan Costea
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Patent number: 8609427Abstract: A sulfur dioxide sensor comprising a first beam having a functionalized sensing surface capable of sensing sulfur dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a functionalized reference surface not capable of sensing sulfur dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of sulfur dioxide may be performed, further wherein the first beam is functionalized with a liquid phase of a first polymeric compound and the second beam is functionalized with a liquid phase of a second polymeric compound is provided. In one embodiment, the sensor is a nano-sensor capable of low drift accurately detecting sulfur dioxide levels at the zeptograms level. Methods of making and using a sulfur dioxide sensor are also provided.Type: GrantFiled: December 7, 2010Date of Patent: December 17, 2013Assignee: Honeywell Romania s.r.l.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Patent number: 8563319Abstract: A nitrogen dioxide sensor comprising a first beam having a first functionalized sensing surface capable of sensing nitrogen dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a second functionalized reference surface not capable of sensing nitrogen dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of nitrogen dioxide may be performed, further wherein the first beam and the second beam are each functionalized with one or more soft bases having comparable viscoelastic properties is provided. In one embodiment, the sensor is a nano-sensor capable of low drift and accurate detection of nitrogen dioxide levels at the zeptogram level. Methods of making and using a nitrogen dioxide sensor are also provided.Type: GrantFiled: December 7, 2010Date of Patent: October 22, 2013Assignee: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru, Octavian Buiu
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Patent number: 8544314Abstract: A carbon dioxide sensor comprising a first beam that includes a functionalized surface and a second beam that includes a functionalized surface such that reduced-drift differential sensing of carbon dioxide may be performed by monitoring changes in the resonant frequency of the first beam relative to the resonant frequency of second beam.Type: GrantFiled: December 7, 2010Date of Patent: October 1, 2013Assignee: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Patent number: 8546817Abstract: An example sensor that includes a first Schottky diode, a second Schottky diode and an integrated circuit. The sensor further includes a voltage generator that generates a first voltage across the first Schottky diode and a second voltage across the second Schottky diode. When the first Schottky diode and the second Schottky diode are subjected to different strain, the integrated circuit measures the values of the currents flowing through the first Schottky diode and the second Schottky diode to determine the strain on an element where the first Schottky diode and the second Schottky diode are attached.Type: GrantFiled: November 30, 2011Date of Patent: October 1, 2013Assignee: Honeywell International Inc.Inventors: Viorel Georgel Dumitru, Mihai Brezeanu, Stefan Dan Costea, Ion Georgescu, Viorel Avramescu, Bogdan Catalin Serban
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Patent number: 8519449Abstract: A piezoelectric strain sensor and method thereof for detecting strain, vibration, and/or pressure. The sensor incorporates a sequence of piezoelectric and semiconductor layers in a thin-film transistor structure. The thin-film transistor structure can be configured on a flexible substrate via a low-cost fabrication technique. The piezoelectric layer generates an electric charge resulting in a modulation of a transistor current, which is a measure of external strain. The sensor can be formed as a single gate field-effect piezoelectric sensor and a dual gate field-effect piezoelectric sensor. The semiconductor layer can be configured from a nanowire array resulting in a metal-piezoelectric-nanowire field effect transistor. The single and dual gate field-effect piezoelectric sensor offer increased sensitivity and device control due to the presence of the piezoelectric layer in the transistor structure and low cost manufacturability on large area flexible substrates.Type: GrantFiled: July 23, 2010Date of Patent: August 27, 2013Assignee: Honeywell International Inc.Inventors: Viorel-Georgel Dumitru, Cornel Cobianu, Stefan-Dan Costea, Bogdan-Catalin Serban
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Publication number: 20130171027Abstract: A fluorescence quenching oxygen sensor (100) comprises a support (102) having coated thereon; a compound having hard or soft acid groups (104); and one or more pyrene compounds (106) represented by Y—R-Pyrene??(I) attached to the compound having hard or soft basic groups; wherein Y is a hard or soft basic group and R is an aliphatic linking group having 1 to 19 carbon atoms. The sensor can be used to prepare a fluorescence quenching oxygen detector.Type: ApplicationFiled: December 28, 2012Publication date: July 4, 2013Applicant: Honeywell International Inc.Inventors: Bogdan Catalin Serban, Mihai N. Mihaila, Octavian Buiu, Stefan Dan Costea
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Patent number: 8372674Abstract: A method includes forming a hole in a first wafer and forming a sensor structure in or on a second wafer. The second wafer includes a piezoelectric material. The method also includes bonding the first wafer and the second wafer, where the sensor structure is located between the wafers. The method further includes forming a sensing layer by depositing material between the wafers through the hole in the first wafer. The sensing layer could be formed by depositing a sensing layer material on the second wafer using direct printing. Also, the hole through the first wafer could be formed using ultrasonic milling, micro-drilling, laser drilling, wet etching, and/or plasma etching. A spacer material could be used to bond the wafers together, such as frit glass paste or an organic adhesive. Trenches could be formed in the first wafer to facilitate easier separation of multiple sensors.Type: GrantFiled: January 30, 2009Date of Patent: February 12, 2013Assignee: Honeywell International Inc.Inventors: Cornel Cobianu, Bogdan-Catalin Serban
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Patent number: 8230720Abstract: A resonant nanosensor apparatus associated with a functionalized monolayer for detecting carbon dioxide and a method of forming the same. A wafer including a sensing vibrating beam and a reference vibrating beam may be functionalized with a functional group in order to form a sensing self monolayer. The sensing self assembled monolayer may be configured by bridging oxygen or carbon atoms covalently bonded with respect to the vibrating beams. A liquid solution of hydrochloric acid may then be applied to the sensing self assembled monolayer at the surface of the reference beam by a direct printing process to obtain a reference monolayer. The liquid solution of HCl transforms the functional groups responsible for the carbon dioxide detection into protonated groups, which do not react with carbon dioxide, but possess visco-elastic properties similar to that of the sensing monolayer.Type: GrantFiled: August 16, 2010Date of Patent: July 31, 2012Assignee: Honeywell International Inc.Inventors: Bogdan-Catalin Serban, Cornel Cobianu, Mihai N. Mihaila, Viorel-Georgel Dumitru
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Publication number: 20120164031Abstract: A fluorescence quenching based oxygen sensor can be prepared comprising a polystyrene polymer linked to pyrene. The fluorescence based sensor has the formula (I), Polystyrene-Y—R-Pyrene??(I); wherein Y is fluorescence quenching and R is an aliphatic linking group having 1 to 11 carbon atoms. The sensor can be coated onto a support and integrated with an LED excitation source and fluorescence detector.Type: ApplicationFiled: December 1, 2011Publication date: June 28, 2012Applicant: HONEYWELL INTERNATIONAL INC.Inventors: Bogdan Catalin Serban, Mihai N. Mihaila, Octavian Buiu
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Publication number: 20120161147Abstract: An example sensor that includes a first Schottky diode, a second Schottky diode and an integrated circuit. The sensor further includes a voltage generator that generates a first voltage across the first Schottky diode and a second voltage across the second Schottky diode. When the first Schottky diode and the second Schottky diode are subjected to different strain, the integrated circuit measures the values of the currents flowing through the first Schottky diode and the second Schottky diode to determine the strain on an element where the first Schottky diode and the second Schottky diode are attached.Type: ApplicationFiled: November 30, 2011Publication date: June 28, 2012Applicant: HONEYWELL INTERNATIONAL INC.Inventors: Viorel Georgel DUMITRU, Mihai Brezeanu, Stefan Dan Costea, Ion Georgescu, Viorel Avramescu, Bogdan-Catalin Serban
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Publication number: 20120141807Abstract: A fluorescence based oxygen sensor can be prepared comprising a polyaniline polymer doped with one or more pyrene carboxylic acids. The polyaniline has the formula: and the pyrene carboxylic acids have the formula: Pyrene-R—COOH??(II); wherein R is an aliphatic linking group having 1 to 11 carbon atoms, n represents half the degree of polymerization, x is about 0.5, and (1?x) is about 0.5. The sensor can be coated onto a support. Upon excitation with an appropriate wavelength, the polyaniline/pyrene coating fluoresces. Upon exposure to oxygen the fluorescence rapidly decays.Type: ApplicationFiled: December 1, 2011Publication date: June 7, 2012Applicant: HONEYWELL INTERNATIONAL INC.Inventors: Bogdan Catalin Serban, Mihai N. Mihaila, Octavian Buiu
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Publication number: 20110138878Abstract: A carbon dioxide sensor comprising a first beam that includes a functionalized surface and a second beam that includes a functionalized surface such that reduced-drift differential sensing of carbon dioxide may be performed by monitoring changes in the resonant frequency of the first beam relative to the resonant frequency of second beam.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Publication number: 20110143448Abstract: A sulfur dioxide sensor comprising a first beam having a functionalized sensing surface capable of sensing sulfur dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a functionalized reference surface not capable of sensing sulfur dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of sulfur dioxide may be performed, further wherein the first beam is functionalized with a liquid phase of a first polymeric compound and the second beam is functionalized with a liquid phase of a second polymeric compound is provided. In one embodiment, the sensor is a nano-sensor capable of low drift accurately detecting sulfur dioxide levels at the zeptograms level. Methods of making and using a sulfur dioxide sensor are also provided.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Publication number: 20110143447Abstract: A nitrogen dioxide sensor comprising a first beam having a first functionalized sensing surface capable of sensing nitrogen dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a second functionalized reference surface not capable of sensing nitrogen dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of nitrogen dioxide may be performed, further wherein the first beam and the second beam are each functionalized with one or more soft bases having comparable viscoelastic properties is provided. In one embodiment, the sensor is a nano-sensor capable of low drift and accurate detection of nitrogen dioxide levels at the zeptogram level. Methods of making and using a nitrogen dioxide sensor are also provided.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru, Octavian Buiu
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Publication number: 20110116974Abstract: A resonant nanosensor apparatus associated with a functionalized monolayer for detecting carbon dioxide and a method of forming the same. A wafer including a sensing vibrating beam and a reference vibrating beam may be functionalized with a functional group in order to form a sensing self monolayer. The sensing self assembled monolayer may be configured by bridging oxygen or carbon atoms covalently bonded with respect to the vibrating beams. A liquid solution of hydrochloric acid may then be applied to the sensing self assembled monolayer at the surface of the reference beam by a direct printing process to obtain a reference monolayer. The liquid solution of HCl transforms the functional groups responsible for the carbon dioxide detection into protonated groups, which do not react with carbon dioxide, but possess visco-elastic properties similar to that of the sensing monolayer.Type: ApplicationFiled: August 16, 2010Publication date: May 19, 2011Applicant: HONEYWELL ROMANIA SRLInventors: Bogdan-Catalin Serban, Cornel Cobianu, Mihai N. Mihaila, Viorel-Georgel Dumitru
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Patent number: 7913541Abstract: The design and synthesis of a matrix nanocomposite containing amino carbon nanotubes used as a functionalized sensing layer for carbon dioxide detection by means acoustic wave sensing devices, e.g., SAW/BAW devices. These sensing materials contain a type of amino carbon nanotubes (single walled or multi-walled) and a polymer (or other compounds) which are sensitive to carbon dioxide in the acoustic wave sensing device based gas sensors. The sensitivity of the matrix consisting of the amino carbon nanotubes and a polymer (or other compounds) is ensured by the presence of amino groups which can react at room temperature with CO2 in a reversible process to form carbamates.Type: GrantFiled: April 30, 2007Date of Patent: March 29, 2011Assignee: Honeywell International Inc.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mircea Bercu, Nicolae Varachiu, Mihai N. Mihaila, Cazimir G. Bostan, Stefan Ioan Voicu