Patents by Inventor Shabnam Virji
Shabnam Virji 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: 9446956Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: GrantFiled: January 9, 2015Date of Patent: September 20, 2016Assignees: The Arizona Board of Regents on Behalf of the University of Arizona, Canon Kabushiki KaishaInventors: Palash Gangopadhyay, Robert A. Norwood, Alexander Ashton Miles, Jun Kato, Shabnam Virji, Mamoru Miyawaki
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Patent number: 9034266Abstract: A method for sensing hydrogen includes the use of a transduction device with a sensing layer, and means for measuring a mass and/or conductivity change caused by an interaction of a gas with the sensing layer to provide a measure of an amount of hydrogen in the gas. The sensing layer includes polyaniline nanofiber material.Type: GrantFiled: August 2, 2011Date of Patent: May 19, 2015Assignees: The Aerospace Corporation, The Regents of the University of CaliforniaInventors: Shabnam Virji, Richard B. Kaner, Bruce H. Weiller
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Publication number: 20150125379Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: ApplicationFiled: January 9, 2015Publication date: May 7, 2015Inventors: Palash Gangopadhyay, Robert A. Norwood, Alexander Ashton Miles, Jun Kato, Shabnam Virji-Khalfan, Mamoru Miyawaki
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Patent number: 8961880Abstract: A sensor for detecting phosgene includes a pair of electrodes separated by an electrode gap, and a layer of conducting polymer material positioned over and making electrical contact with the pair of electrodes, the layer of conducting polymer material being modified with an amine such that the electrical resistance of the conducting polymer material measured across the electrodes is responsive to changes in an amount of phosgene to which the conducting polymer material is exposed.Type: GrantFiled: July 14, 2008Date of Patent: February 24, 2015Assignees: The Aerospace Corporation, The Regents of the University of CaliforniaInventors: Shabnam Virji, Robert Kojima, Richard B. Kaner, Bruce H. Weiller
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Patent number: 8940267Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: GrantFiled: June 28, 2012Date of Patent: January 27, 2015Assignees: The Arizona Board of Regents on Behalf of the University of Arizona, Canon Kabushiki KaishaInventors: Robert A. Norwood, Palash Gangopadhyay, Alexander Ashton Miles, Jun Kato, Shabnam Virji-Khalfan, Mamoru Miyawaki
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Publication number: 20140004031Abstract: A method of purifying a nanodiamond powder includes preparing the nanodiamond powder, heating the nanodiamond powder at between 450° C. and 470° C. in an atmosphere including oxygen, performing a hydrochloric acid treatment on the heated nanodiamond powder, and performing a hydrofluoric acid treatment on the nanodiamond powder obtained after performing the hydrochloric acid treatment.Type: ApplicationFiled: June 28, 2012Publication date: January 2, 2014Applicants: Arizona Board of Regents on Behalf of The University of Arizona, CANON KABUSHIKI KAISHAInventors: Robert A. Norwood, Palash Gangopadhyay, Alexander Ashton Miles, Jun Kato, Shabnam Virji-Khalfan, Mamoru Miyawaki
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Publication number: 20110300637Abstract: A method for sensing hydrogen includes the use of a transduction device with a sensing layer, and means for measuring a mass and/or conductivity change caused by an interaction of a gas with the sensing layer to provide a measure of an amount of hydrogen in the gas. The sensing layer includes polyaniline nanofiber material.Type: ApplicationFiled: August 2, 2011Publication date: December 8, 2011Inventors: Shabnam Virji, Richard B. Kaner, Bruce H. Weiller
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Publication number: 20110287551Abstract: A sensor made from a metal salt film, formed on a set of monitoring electrodes, by evaporation of a metal salt aqueous solution disposed on the electrodes, is used for detecting a weak acid. Low concentrations of the weak acid, such as ten ppm, are indicated as the conductivity of the film changes by several orders of magnitude, as a result of reaction of the weak acid with the metal salt, as the metal salt converts to a metal reaction product upon exposure to the weak acid.Type: ApplicationFiled: July 27, 2011Publication date: November 24, 2011Inventors: Bruce H. Weiller, Richard B. Kaner, Shabnam Virji
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Patent number: 8012326Abstract: Polymer nanofibers, such as polyaniline nanofibers, with uniform diameters less than 500 nm can be made in bulk quantities through a facile aqueous and organic interfacial polymerization method at ambient conditions. The nanofibers have lengths varying from 500 nm to 10 ?m and form interconnected networks in a thin film. Thin film nanofiber sensors can be made of the polyaniline nanofibers having superior performance in both sensitivity and time response to a variety of gas vapors including, acids, bases, redox active vapors, alcohols and volatile organic chemicals.Type: GrantFiled: February 1, 2007Date of Patent: September 6, 2011Assignees: The Regeants Of The Universtiy Of California, The Aerospace CorporationInventors: Bruce H. Weiller, Shabnam Virji, Richard B. Kaner, Jiaxing Huang
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Publication number: 20100059375Abstract: A hydrogen sulfide sensor is made from a metal acetate film, such as a thin film of copper acetate, formed on a set of monitoring electrodes, by evaporation of a metal acetate aqueous solution disposed on the electrodes, for detecting a weak gas, such as hydrogen sulfide, carried in a gas carrier, such as a nitrogen carrier, for detecting low concentration of the weak gas, such as ten ppm, when the conductivity of the film changes by several orders of magnitude, that produces a metal sulfide, such as copper sulfide, that is a good electrical conductor at room temperature, for example, as the metal acetate is converted directly to a metal sulfide upon exposure to hydrogen sulfide.Type: ApplicationFiled: November 8, 2006Publication date: March 11, 2010Inventors: Bruce H. Weiller, Richard B. Kaner, Shabnam Virji
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Publication number: 20100006434Abstract: A sensor for detecting phosgene includes a pair of electrodes separated by an electrode gap, and a layer of conducting polymer material positioned over and making electrical contact with the pair of electrodes, the layer of conducting polymer material being modified with an amine such that the electrical resistance of the conducting polymer material measured across the electrodes is responsive to changes in an amount of phosgene to which the conducting polymer material is exposed.Type: ApplicationFiled: July 14, 2008Publication date: January 14, 2010Inventors: Shabnam Virji, Robert Kojima, Richard B. Kaner, Bruce H. Weiller
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Publication number: 20100005858Abstract: A sensor for detecting arsine includes a pair of electrodes separated by an electrode gap, and a layer of conducting polymer material positioned over and making electrical contact with the pair of electrodes, the layer of conducting polymer material being modified with a metal salt such that the electrical resistance of the conducting polymer material measured across the electrodes is responsive to changes in an amount of arsine to which the conducting polymer material is exposed.Type: ApplicationFiled: July 14, 2008Publication date: January 14, 2010Inventors: Shabnam Virji, Robert Kojima, Richard B. Kaner, Bruce H. Weiller
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Publication number: 20080101994Abstract: An apparatus for sensing hydrogen includes a transduction device with a sensing layer, and means for measuring a mass and/or conductivity change caused by an interaction of a gas with the sensing layer to provide a measure of an amount of hydrogen in the gas. The sensing layer includes polyaniline nanofiber material.Type: ApplicationFiled: October 28, 2006Publication date: May 1, 2008Inventors: Shabnam Virji, Richard B. Kaner, Bruce H. Weiller
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Publication number: 20070187239Abstract: Polymer nanofibers, such as polyaniline nanofibers, with uniform diameters less than 500 nm can be made in bulk quantities through a facile aqueous and organic interfacial polymerization method at ambient conditions. The nanofibers have lengths varying from 500 nm to 10 ?m and form interconnected networks in a thin film. Thin film nanofiber sensors can be made of the polyaniline nanofibers having superior performance in both sensitivity and time response to a variety of gas vapors including, acids, bases, redox active vapors, alcohols and volatile organic chemicals.Type: ApplicationFiled: February 1, 2007Publication date: August 16, 2007Inventors: Bruce Weiller, Shabnam Virji, Richard Kaner, Jiaxing Huang
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Patent number: 7226530Abstract: Polymer nanofibers, such as polyaniline nanofibers, with uniform diameters less than 500 nm can be made in bulk quantities through a facile aqueous and organic interfacial polymerization method at ambient conditions. The nanofibers have lengths varying from 500 nm to 10 ?m and form interconnected networks in a thin film. Thin film nanofiber sensors can be made of the polyaniline nanofibers having superior performance in both sensitivity and time response to a variety of gas vapors including, acids, bases, redox active vapors, alcohols and volatile organic chemicals.Type: GrantFiled: December 11, 2003Date of Patent: June 5, 2007Assignees: The Aerospace Corporation, Regents of the University of CaliforniaInventors: Bruce H. Weiller, Shabnam Virji, Richard B. Kaner, Jiaxing Huang
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Patent number: 7144949Abstract: Polymer nanofibers, such as polyaniline nanofibers, with uniform diameters less than 500 nm can be made in bulk quantities through a facile aqueous and organic interfacial polymerization method at ambient conditions. The nanofibers have lengths varying from 500 nm to 10 ?m and form interconnected networks in a thin film. Thin film nanofiber sensors can be made of the polyaniline nanofibers having superior performance in both sensitivity and time response to a variety of gas vapors including, acids, bases, redox active vapors, alcohols and volatile organic chemicals.Type: GrantFiled: December 11, 2003Date of Patent: December 5, 2006Assignees: The Aerospace Corporation, Regents of the University of CaliforniaInventors: Richard B. Kaner, Jiaxing Huang, Bruce H. Weiller, Shabnam Virji
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Publication number: 20050126909Abstract: Polymer nanofibers, such as polyaniline nanofibers, with uniform diameters less than 500 nm can be made in bulk quantities through a facile aqueous and organic interfacial polymerization method at ambient conditions. The nanofibers have lengths varying from 500 nm to 10 ?m and form interconnected networks in a thin film. Thin film nanofiber sensors can be made of the polyaniline nanofibers having superior performance in both sensitivity and time response to a variety of gas vapors including, acids, bases, redox active vapors, alcohols and volatile organic chemicals.Type: ApplicationFiled: December 11, 2003Publication date: June 16, 2005Inventors: Bruce Weiller, Shabnam Virji, Richard Kaner, Jiaxing Huang
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Publication number: 20050131139Abstract: Polymer nanofibers, such as polyaniline nanofibers, with uniform diameters less than 500 nm can be made in bulk quantities through a facile aqueous and organic interfacial polymerization method at ambient conditions. The nanofibers have lengths varying from 500 nm to 10 ?m and form interconnected networks in a thin film. Thin film nanofiber sensors can be made of the polyaniline nanofibers having superior performance in both sensitivity and time response to a variety of gas vapors including, acids, bases, redox active vapors, alcohols and volatile organic chemicals.Type: ApplicationFiled: December 11, 2003Publication date: June 16, 2005Inventors: Richard Kaner, Jiaxing Huang, Bruce Weiller, Shabnam Virji