Patents by Inventor William J. Chappell
William J. Chappell 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: 20230309827Abstract: Certain pressure sensor devices are much smaller than prior art devices, yet are at least as sensitive as the prior art devices. A capacitive pressure sensor can include a flexible substrate that permits bending of a pressure sensing region without significantly affecting operation thereof. The pressure sensor can include a flexible membrane in which an electrode is sandwiched between two layers of polymeric material. The sandwiched electrode can be extremely close to a reference electrode so as to provide for highly sensitive capacitance readings, yet the membrane can be restricted from contacting the reference electrode under high pressure condition.Type: ApplicationFiled: October 19, 2022Publication date: October 5, 2023Applicants: The Jackson Laboratory, Purdue Research FoundationInventors: Pedro P. Irazoqui, Dohyuk Ha, William J. Chappell, Simon W.M. John
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Patent number: 10797522Abstract: A wireless power transfer system is disclosed. The system includes a first resonator having a first resonant frequency ?o1, a half power bandwidth ??1, and an unloaded quality factor Qo1=?o1/??1 coupled through a first coupling circuit to a power source, a second resonator having a second resonant frequency ?o2, a half power bandwidth ??2, and an unloaded quality factor Qo2=?o2/??2 coupled through a second coupling circuit to a load, the first resonator disposed a distance away from the second resonator, wherein the distance is smaller than the first and second resonant wavelengths, the first and second coupling circuits are configured so that up to a maximum achievable power transfer efficiency between the first and second resonators can be achieved, wherein Qo1 and Qo2 can be less than 100.Type: GrantFiled: August 7, 2018Date of Patent: October 6, 2020Assignee: Purdue Research FoundationInventors: William J. Chappell, Dohyuk Ha, Henry Mei, Pedro P. Irazoqui
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Publication number: 20200237218Abstract: Certain pressure sensor devices are much smaller than prior art devices, yet are at least as sensitive as the prior art devices. A capacitive pressure sensor can include a flexible substrate that permits bending of a pressure sensing region without significantly affecting operation thereof. The pressure sensor can include a flexible membrane in which an electrode is sandwiched between two layers of polymeric material. The sandwiched electrode can be extremely close to a reference electrode so as to provide for highly sensitive capacitance readings, yet the membrane can be restricted from contacting the reference electrode under high pressure condition.Type: ApplicationFiled: January 30, 2020Publication date: July 30, 2020Applicants: The Jackson Laboratory, Purdue Research FoundationInventors: Pedro P. Irazoqui, Dohyuk Ha, William J. Chappell, Simon W.M. John
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Publication number: 20180375382Abstract: A wireless power transfer system is disclosed. The system includes a first resonator having a first resonant frequency ?o1, a half power bandwidth ??1, and an unloaded quality factor Qo1=?o1/??1 coupled through a first coupling circuit to a power source, a second resonator having a second resonant frequency ?o2, a half power bandwidth ??2, and an unloaded quality factor Qo2=?o2/??2 coupled through a second coupling circuit to a load, the first resonator disposed a distance away from the second resonator, wherein the distance is smaller than the first and second resonant wavelengths, the first and second coupling circuits are configured so that up to a maximum achievable power transfer efficiency between the first and second resonators can be achieved, wherein Qo1 and Qo2 can be less than 100.Type: ApplicationFiled: August 7, 2018Publication date: December 27, 2018Applicant: Purdue Research FoundationInventors: William J. Chappell, Dohyuk Ha, Henry Mei, Pedro P. Irazoqui
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Patent number: 10044227Abstract: A wireless power transfer system is disclosed. The system includes a first resonator having a first resonant frequency ?o1, a half power bandwidth ??1, and an unloaded quality factor Qo1=?o1/??1 coupled through a first coupling circuit to a power source, a second resonator having a second resonant frequency ?o2, a half power bandwidth ??2, and an unloaded quality factor Qo2=?o2/??2 coupled through a second coupling circuit to a load, the first resonator disposed a distance away from the second resonator, wherein the distance is smaller than the first and second resonant wavelengths, the first and second coupling circuits are configured so that up to a maximum achievable power transfer efficiency between the first and second resonators can be achieved, wherein Qo1 and Qo2 can be less than 100.Type: GrantFiled: June 2, 2015Date of Patent: August 7, 2018Assignee: Purdue Research FoundationInventors: William J. Chappell, Dohyuk Ha, Henry Mei, Pedro P. Irazoqui
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Publication number: 20180035888Abstract: Certain pressure sensor devices are much smaller than prior art devices, yet are at least as sensitive as the prior art devices. A capacitive pressure sensor can include a flexible substrate that permits bending of a pressure sensing region without significantly affecting operation thereof. The pressure sensor can include a flexible membrane in which an electrode is sandwiched between two layers of polymeric material. The sandwiched electrode can be extremely close to a reference electrode so as to provide for highly sensitive capacitance readings, yet the membrane can be restricted from contacting the reference electrode under high pressure condition.Type: ApplicationFiled: March 21, 2017Publication date: February 8, 2018Inventors: Pedro P. Irazoqui, Dohyuk Ha, William J. Chappell, Simon W.M. John
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Patent number: 9662021Abstract: A system is provided for the transmission of in vivo arterial pressure, the system comprising: an a pressure sensor whereby in vivo arterial pressure data is collected; a wireless transmitter, whereby the in vivo arterial pressure data is transmitted to be received disposed externally to a patient in which the system is disposed; a stent body, the stent body having an integral antenna, and a power source, whereby power is supplied to the system.Type: GrantFiled: January 12, 2010Date of Patent: May 30, 2017Assignee: Purdue Research FoundationInventors: Eric Y. Chow, Brooke Beier, William J. Chappell, Pedro P. Irazoqui
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Patent number: 9596988Abstract: Certain pressure sensor devices are much smaller than prior art devices, yet are at least as sensitive as the prior art devices. A capacitive pressure sensor can include a flexible substrate that permits bending of a pressure sensing region without significantly affecting operation thereof. The pressure sensor can include a flexible membrane in which an electrode is sandwiched between two layers of polymeric material. The sandwiched electrode can be extremely close to a reference electrode so as to provide for highly sensitive capacitance readings, yet the membrane can be restricted from contacting the reference electrode under high pressure conditions.Type: GrantFiled: October 12, 2012Date of Patent: March 21, 2017Assignees: Purdue Research Foundation, The Jackson LaboratoryInventors: Pedro P. Irazoqui, Dohyuk Ha, William J. Chappell, Simon W. M. John
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Patent number: 9306261Abstract: A magnetic field method for mitigating passive intermodulation distortion. The method is useful both for mitigating passive intermodulation and for easily locating dominant sources of it, even in shielded components.Type: GrantFiled: June 4, 2010Date of Patent: April 5, 2016Assignee: PURDUE RESEARCH FOUNDATIONInventors: Justin J. Henrie, Andrew Christianson, William J. Chappell
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Publication number: 20150380988Abstract: A wireless power transfer system is disclosed. The system includes a first resonator having a first resonant frequency ?o1, a half power bandwidth ??1, and an unloaded quality factor Qo1=?o1/??1 coupled through a first coupling circuit to a power source, a second resonator having a second resonant frequency ?o2, a half power bandwidth ??2, and an unloaded quality factor Qo2=?o2/??2 coupled through a second coupling circuit to a load, the first resonator disposed a distance away from the second resonator, wherein the distance is smaller than the first and second resonant wavelengths, the first and second coupling circuits are configured so that up to a maximum achievable power transfer efficiency between the first and second resonators can be achieved, wherein Qo1 and Qo2 can be less than 100.Type: ApplicationFiled: June 2, 2015Publication date: December 31, 2015Applicant: PURDUE RESEARCH FOUNDATIONInventors: William J. Chappell, Dohyuk Ha, Henry Mei, Pedro P. Irazoqui
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Patent number: 9078613Abstract: A system is provided for monitoring intraocular pressure, the system comprising: a sensor package configured to be disposed in the suprachoroidal space of a patient's eye; a pressure sensor; a wireless transceiver disposed within the sensor package and coupled to the pressure sensor; an external transceiver, the external receiver being wirelessly coupled to the wireless transceiver when the transceiver is disposed proximate to the patient's eye.Type: GrantFiled: May 28, 2013Date of Patent: July 14, 2015Assignee: Purdue Research FoundationInventors: Pedro P. Irazoqui, Eric Y. Chow, William J. Chappell, Chin-Lung Yang, Babak Ziaie
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Patent number: 9024709Abstract: A tunable filter having an electronically tunable center frequency and dynamic bandwidth control over a large tuning range. High-Q continuously tunable evanescent-mode cavity resonators and filters using reliable RF MEMS actuators. One embodiment is a 3.4-6.2 GHz (1.8:1 tuning ratio) continuously tunable electrostatic MEMS resonator with quality factor of 460-530, with a volume of 18×30×4 mm including the actuation scheme and biasing lines. A tunable resonators is also disclosed with a 2.8:1 (5.0-1.9 GHz) tuning ratio, and Q of 300-650.Type: GrantFiled: October 3, 2009Date of Patent: May 5, 2015Assignee: Purdue Research FoundationInventors: Himanshu Joshi, Hjalti Hreinn Sigmarsson, Dimitrios Peroulis, William J. Chappell, Xiaoguang Liu
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Publication number: 20140296687Abstract: Certain pressure sensor devices are much smaller than prior art devices, yet are at least as sensitive as the prior art devices. A capacitive pressure sensor can include a flexible substrate that permits bending of a pressure sensing region without significantly affecting operation thereof. The pressure sensor can include a flexible membrane in which an electrode is sandwiched between two layers of polymeric material. The sandwiched electrode can be extremely close to a reference electrode so as to provide for highly sensitive capacitance readings, yet the membrane can be restricted from contacting the reference electrode under high pressure conditions.Type: ApplicationFiled: October 12, 2012Publication date: October 2, 2014Inventors: Pedro P. Irazoqui, Dohyuk Ha, William J. Chappell, Simon W.M. John
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Patent number: 8816807Abstract: An anisotropic conductive adhesive (ACA) arrangement is disclosed, including a thermosetting resin disposed between a connector of a first structure and a connector of a second structure, and a plurality of ferromagnetic conductive particles dispersed through the thermosetting resin, wherein the plurality of ferromagnetic conductive particles form columns between the connector of the first structure and the connector of the second structure, and wherein a density of the ferromagnetic particles in the columns is substantially higher than a density of the plurality of ferromagnetic particles away from the columns.Type: GrantFiled: May 23, 2011Date of Patent: August 26, 2014Assignee: Purdue Research FoundationInventors: William J. Chappell, Sungwook Moon, Maria Bellorin
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Publication number: 20140088400Abstract: A system is provided for monitoring intraocular pressure, the system comprising: a sensor package configured to be disposed in the suprachoroidal space of a patient's eye; a pressure sensor; a wireless transceiver disposed within the sensor package and coupled to the pressure sensor; an external transceiver, the external receiver being wirelessly coupled to the wireless transceiver when the transceiver is disposed proximate to the patient's eye.Type: ApplicationFiled: May 28, 2013Publication date: March 27, 2014Applicant: Perdue Research FoundationInventors: Pedro P. Irazoqui, Eric Y. Chow, William J. Chappell, Chin-Lung Yang, Babak Ziaie
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Patent number: 8665040Abstract: A field programmable filter array with high spectral isolation and reconfigurability. A bank of resonators can be programmed at will and on the fly to give any type of filtering response. The order, type and bandwidth of the filter are electronically reconfigured. Each subset of resonators can switch between bandstop and bandpass configurations and form custom filter shapes consisting of combinations of bandstop and bandpass filters. The filter can include a unit cell of a resonator with a series of switches to enable coupling to any of its nearest neighbors. The path in which the flow of energy takes through the array of resonators is dynamic, and the filtering function which is created is dialable on demand.Type: GrantFiled: March 9, 2011Date of Patent: March 4, 2014Assignee: Purdue Research FoundationInventors: William J. Chappell, Dimitrios Peroulis, JuSeop Lee, Eric J. Naglich, Hjalti H. Sigmarsson
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Patent number: 8475374Abstract: A system is provided for monitoring intraocular pressure, the system comprising: a sensor package configured to be disposed in the suprachoroidal space of a patient's eye; a pressure sensor; a wireless transceiver disposed within the sensor package and coupled to the pressure sensor; an external transceiver, the external receiver being wirelessly coupled to the wireless transceiver when the transceiver is disposed proximate to the patient's eye.Type: GrantFiled: August 22, 2008Date of Patent: July 2, 2013Assignee: Purdue Research FoundationInventors: Pedro P. Irazoqui, Eric Y. Chow, William J. Chappell, Chin-Lung Yang, Babak Ziaie
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Publication number: 20120139656Abstract: A magnetic field method for mitigating passive intermodulation distortion. The method is useful both for mitigating passive intermodulation and for easily locating dominant sources of it, even in shielded components.Type: ApplicationFiled: June 4, 2010Publication date: June 7, 2012Inventors: Justin J. Henrie, Andrew Christianson, William J. Chappell
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Patent number: 8077101Abstract: Methods and apparatus that provide grade-level RF transceivers for use in trans-grade wireless communication networks. The methods involve incorporating slot antennas into grade-level opening covers, such as manhole covers, to provide built-in antennas for transceivers that may be connected by transmission lines. The grade-level transceivers use coupling mechanisms to connect transceivers to the slot antennas by way of transmission feed lines. Multi-slot grade-level transceivers use switching mechanisms to switch between multiple slot antennas. Certain embodiments may also include adaptable RF circuitry. Trans-grade wireless communication networks use these grade-level transceivers to communicate between below-ground and above-ground portions of the network, which may be used in underground utility systems such as combined sewer systems.Type: GrantFiled: February 7, 2007Date of Patent: December 13, 2011Assignee: Purdue Research FoundationInventors: John F. Mastarone, Jr., William J. Chappell
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Publication number: 20110284262Abstract: An anisotropic conductive adhesive (ACA) arrangement is disclosed, including a thermosetting resin disposed between a connector of a first structure and a connector of a second structure, and a plurality of ferromagnetic conductive particles dispersed through the thermosetting resin, wherein the plurality of ferromagnetic conductive particles form columns between the connector of the first structure and the connector of the second structure, and wherein a density of the ferromagnetic particles in the columns is substantially higher than a density of the plurality of ferromagnetic particles away from the columns.Type: ApplicationFiled: May 23, 2011Publication date: November 24, 2011Applicant: PURDUE RESEARCH FOUNDATIONInventors: William J. Chappell, Sungwook Moon, Nestor A. Rojas, Maria Bellorin