Patents by Inventor Cristina E. Davis

Cristina E. Davis 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).

  • Publication number: 20190274584
    Abstract: A selective-sorting system for aerosol droplets in human breath includes a mouthpiece to receive a flow of human breath, and a flow path coupled to the mouthpiece. This flow path includes one or more bends that cause the flow of human breath to change direction, which causes aerosol droplets in the flow having different mass-sizes to change direction at different rates. Moreover, the flow path is shaped so that droplets that change direction at different rates are directed to different destinations. The system also includes a collection path, which is coupled to the flow path so that aerosol droplets meeting a specific mass-size criterion are directed into the collection path. A condenser tube is located in the collection path, wherein the condenser tube includes a cooling mechanism that cools the condenser tube to facilitate condensing aerosol droplets to sides of the condenser tube for subsequent collection.
    Type: Application
    Filed: November 22, 2017
    Publication date: September 12, 2019
    Applicant: The Regents of the University of California
    Inventors: Cristina E. Davis, Konstantin O. Zamuruyev, Michael Schivo, Nicholas J. Kenyon, Jean-Pierre Delplanque, Alexander A. Aksenov
  • Publication number: 20190234906
    Abstract: One embodiment of the present disclosure provides an ion mobility spectrometry (IMS) device for performing chemical analysis. The IMS device includes a first set of electrodes arranged linearly in a first direction and separated by a first set of gaps. The IMS device also includes a second set of electrodes positioned directly opposing the first set of electrodes to match the first set of electrodes on a one-to-one basis, wherein the second set of electrodes are separated by a second set of gaps. The IMS device includes a drift region between the first set of electrodes and the second set of electrodes, wherein charged particles enter at a first end of the drift region and traverse the drift region along the first direction. The IMS device additionally includes a detector positioned at a second end of the drift region and configured to receive charged particles exiting the drift region.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 1, 2019
    Applicant: SensIT Ventures, Inc.
    Inventors: Cristina E. Davis, Alexander A. Aksenov, Yuriy Zrodnikov
  • Publication number: 20190137476
    Abstract: The disclosed embodiments relate to a technique for detecting Huanglongbing (HLB) infection in a citrus plant. This technique involves first gathering one or more samples of volatile organic compounds (VOCs) emanating from the citrus plant. Next, a system measures VOCs in the gathered samples to determine a VOC profile for the citrus plant, wherein the VOC profile comprises measured values for a set of VOCs that comprise disease-specific biomarkers for HLB infection. Finally, the system determines an HLB infection status for the citrus plant by analyzing the VOC profile.
    Type: Application
    Filed: March 23, 2017
    Publication date: May 9, 2019
    Applicant: The Regents of the University of California
    Inventors: Cristina E. Davis, Abhaya M. Dandekar, Alexander A. Aksenov, Alberto Pasamontes Funez, Daniel J. Peirano, Mitchell M. McCartney, Oliver Fiehn, Susan E. Ebeler, Yuriy Zrodnikov
  • Patent number: 10261048
    Abstract: One embodiment of the present disclosure provides an ion mobility spectrometry (IMS) device for performing chemical analysis. The IMS device includes a first set of electrodes arranged linearly in a first direction and separated by a first set of gaps. The IMS device includes a second set of electrodes positioned directly opposing the first set of electrodes to match the first set of electrodes on a one-to-one basis, wherein the second set of electrodes are separated by a second set of gaps. The IMS device includes a drift region between the first set of electrodes and the second set of electrodes, wherein charged particles enter at a first end of the drift region and traverse the drift region along the first direction. The IMS device additionally includes a detector positioned at a second end of the drift region and configured to receive charged particles exiting the drift region.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: April 16, 2019
    Assignee: SENSIT VENTURES, INC.
    Inventors: Cristina E. Davis, Alexander A. Aksenov, Yuriy Zrodnikov
  • Patent number: 9824870
    Abstract: A system that integrates several technologies into a single, portable medical diagnostic apparatus for analyzing a sample body fluid (liquid and/or gas): (1) a mechanism to capture airborne microdroplets and to separate the body fluid into a first fluid component (primarily gas) and a second fluid component (primarily liquid); (2) a volatilizer to convert a portion of the second fluid component into a third fluid component that is primarily a gas; (3) a functionalized nanostructure (NS) array configured to receive, identify, and estimate concentration of at least one constituent in the first and/or third fluid components; (4) a miniaturized differential mobility spectrometer (DMS) module; and (5) a biomarker sensor, to detect volatile and non-volatile molecules in a sample fluid, which may contain one or more components of blood, breath, perspiration, saliva, and urine.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: November 21, 2017
    Assignee: The United States of America as Represented by the Administrator of NASA
    Inventors: Tore Straume, David J. Loftus, Jing Li, Cristina E. Davis, Anup K. Singh, Matthew A. Coleman
  • Publication number: 20170245495
    Abstract: The present disclosure relates to compositions containing a mixture of e.g. one or more or two or more compounds released by a citrus plant in quantities that are altered during infection with Huanglongbing disease, where the composition is an attractant for psyllids. Furthermore, compositions contain one or more active compounds which constitute a synthetic chemical blend for attracting psyllids. Active compounds in the compositions may include, for example, one or more compounds selected from linalool, tridecane, 4-OH-4-Me-2-pentanone, hexacosane, 1-tetradecene, tricosane, geranial, tetradecanal, phenylacetaldehyde, methyl salicylate, cumacrene, (E)-beta-ocimene, hexadecanol, and geranyl acetone.
    Type: Application
    Filed: October 27, 2015
    Publication date: August 31, 2017
    Inventors: Cristina E. DAVIS, Alexander AKSENOV, Lukasz STELINSKI, Xavier MARTINI
  • Publication number: 20150323500
    Abstract: One embodiment of the present disclosure provides an ion mobility spectrometry (IMS) device for performing chemical analysis. The IMS device includes a first set of electrodes arranged linearly in a first direction and separated by a first set of gaps. The IMS device includes a second set of electrodes positioned directly opposing the first set of electrodes to match the first set of electrodes on a one-to-one basis, wherein the second set of electrodes are separated by a second set of gaps. The IMS device includes a drift region between the first set of electrodes and the second set of electrodes, wherein charged particles enter at a first end of the drift region and traverse the drift region along the first direction. The IMS device additionally includes a detector positioned at a second end of the drift region and configured to receive charged particles exiting the drift region.
    Type: Application
    Filed: August 30, 2013
    Publication date: November 12, 2015
    Applicant: The Regents of the University of California
    Inventors: Cristina E. Davis, Alexander A. Aksenov, Yuriy Zrodnikov
  • Publication number: 20150164373
    Abstract: A personal lung function monitoring device capable of exhaled breath analysis is described. The personal lung function monitoring device includes a physical measuring device and a microcontroller. This physical measuring device further includes a flow chamber configured to receive a flow of exhaled breath from a patient/user, and a set of sensors integrated with the flow chamber. The set of sensors can be used to measure a set of properties of the exhaled breath, which can include one or more common lung function parameters and/or one or more biomarkers of the exhaled breath. The microcontroller is coupled to the physical measuring device and configured to receive analog sensor signals from the set of sensors and transmit the digitized sensor signals to a mobile device. In one embodiment, the personal lung function monitoring device combines peak expiratory flow, spirometry, and exhaled breath biomarker measurements into a single device.
    Type: Application
    Filed: June 11, 2013
    Publication date: June 18, 2015
    Inventors: Cristina E. Davis, Jean-Pierre Delplanque, Nicholas J. Kenyon, Alice M. Kwan
  • Patent number: 7968842
    Abstract: The invention provides an interface assembly for delivering an ionized analyte from an ionization apparatus into an ion mobility spectrometer. This allows analysis of biological and non-biological samples, even non-volatile solids, via differential mobility spectrometry, without fragmentation of molecules. The invention also provides portable sample analysis systems that operate at ambient pressure. Systems of the invention may be used for high molecular weight species detection, for example, drinking water contaminants, pathogenic biological agents, bio-organic substances, non-biological material, peptides, proteins, oligonucleotides, polymers, bacteria, and hydrocarbons.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: June 28, 2011
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Angela M. Zapata, Ernest S. Kim, Priya Agrawal, Melissa D. Krebs, Cristina E. Davis
  • Patent number: 7576319
    Abstract: Disclosed herein are systems, methods and apparatus, for detection and identification of chemical warfare agents (CWAs) using a differential mobility spectrometer.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: August 18, 2009
    Assignees: Sionex Corporation, The Charles Stark Draper Laboratory, Inc.
    Inventors: Raanan A. Miller, Erkinjon G. Nazarov, Angela Zapata, Cristina E. Davis, Gary A. Eiceman, Anthony D. Bashall
  • Publication number: 20090078865
    Abstract: The invention provides an interface assembly for delivering an ionized analyte from an ionization apparatus into an ion mobility spectrometer. This allows analysis of biological and non-biological samples, even non-volatile solids, via differential mobility spectrometry, without fragmentation of molecules. The invention also provides portable sample analysis systems that operate at ambient pressure. Systems of the invention may be used for high molecular weight species detection, for example, drinking water contaminants, pathogenic biological agents, bio-organic substances, non-biological material, peptides, proteins, oligonucleotides, polymers, bacteria, and hydrocarbons.
    Type: Application
    Filed: May 16, 2008
    Publication date: March 26, 2009
    Applicant: Charles Stark Draper Laboratory, Inc.
    Inventors: Angela M. Zapata, Ernest S. Kim, Priya Agrawal, Melissa D. Krebs, Cristina E. Davis
  • Patent number: 7388195
    Abstract: The invention provides an interface assembly for delivering an ionized analyte from an ionization apparatus into an ion mobility spectrometer. This allows analysis of biological and non-biological samples, even non-volatile solids, via differential mobility spectrometry, without fragmentation of molecules. The invention also provides portable sample analysis systems that operate at ambient pressure. Systems of the invention may be used for high molecular weight species detection, for example, drinking water contaminants, pathogenic biological agents, bio-organic substances, non-biological material, peptides, proteins, oligonucleotides, polymers, bacteria, and hydrocarbons.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: June 17, 2008
    Assignee: Charles Stark Draper Laboratory, Inc.
    Inventors: Angela M. Zapata, Ernest S. Kim, Priya Agrawal, Melissa D. Krebs, Cristina E. Davis
  • Publication number: 20080128609
    Abstract: Disclosed herein are systems, methods and apparatus, for detection and identification of chemical warfare agents (CWAs) using a differential mobility spectrometer.
    Type: Application
    Filed: February 1, 2008
    Publication date: June 5, 2008
    Applicants: SIONEX CORPORATION, The Charles Stark Draper Laboratory, Inc.
    Inventors: Raanan A. Miller, Erkinjon G. Nazarov, Angela Zapata, Cristina E. Davis, Gary A. Eiceman, Anthony D. Bashall
  • Patent number: 7355170
    Abstract: Disclosed herein are systems, methods and apparatus, for detection and identification of analytes in a volatilized or volatilizable sample, using the mobility-based signature that is produced when the volatilized sample is passed through an ion mobility based analyzer.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: April 8, 2008
    Assignees: Sionex Corporation, The Charles Stark Draper Laboratory, Inc.
    Inventors: Raanan A. Miller, Erkinjon G. Nazarov, Angela Zapata, Cristina E. Davis, Gary A. Eiceman, Anthony D. Bashall
  • Patent number: 7241989
    Abstract: Disclosed herein are systems, methods and apparatus, for detection and identification of analytes in a volatilized or volatilizable sample, using the mobility-based signature that is produced when the volatilized sample is passed through an ion mobility based analyzer.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: July 10, 2007
    Assignee: Sionex Corp.
    Inventors: Raanan A. Miller, Erkinjon G. Nazarov, Angela Zapata, Cristina E. Davis, Gary A. Eiceman, Anthony D. Bashall
  • Patent number: 7057168
    Abstract: Disclosed herein are systems, methods and apparatus, for detection and identification of analytes in a volatilized or volatilizable sample, using the mobility-based signature that is produced when the volatilized sample is passed through a differential ion mobility spectrometry (DMS) device.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: June 6, 2006
    Assignees: Sionex Corporation, The Charles Stark Draper Laboratory
    Inventors: Raanan A. Miller, Erkinjon G. Nazarov, Angela Zapata, Cristina E. Davis, Gary A. Eiceman, Anthony D. Bashall