Patents by Inventor David Leith
David Leith 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: 20240142154Abstract: A portable cooler container is provided. The temperature control system cools a chamber of the container to transport temperature sensitive contents via the container. An electronic display screen on one of the lid and the container body selectively displays an electronic shipping label for the portable cooler container.Type: ApplicationFiled: June 2, 2023Publication date: May 2, 2024Inventors: Clayton Alexander, Daren John Leith, Mikko Juhani Timperi, Christopher Thomas Wakeham, Rahul Mulinti, Jacob William Emmert, Paul Thomas Gurney, Simon David James
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Publication number: 20230105847Abstract: A system may include a computer-readable storage media configured to store instructions. The system may also include one or more processors communicatively coupled to the one or more computer-readable storage media. The one or more processors may be configured to, in response to execution of the instructions, cause the system to perform operations. The operations may include measuring a pressure of a volume while a user wears a mask and breathes. The volume may be defined by an interior surface of the mask and a face of the user. The operations may also include determining a differential pressure due to the mask. The differential pressure may be equal to a difference between the pressure of the volume and an ambient pressure of an environment proximate an exterior surface of the mask. In addition, the operations may include determining a mask leakage rate of the mask based on the differential pressure.Type: ApplicationFiled: October 4, 2022Publication date: April 6, 2023Inventors: Christian L'Orange, John Volckens, David Leith, Casey Quinn, Bonnie Young, John Kodros
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Patent number: 11474005Abstract: A portable sampling device includes a sampling housing at least partially enclosing an inner chamber; at least one pumping element disposed within the inner chamber and configured to facilitate airflow through the device; and at least one gas sensor disposed within the inner chamber and configured to detect and/or characterize one or more gases in the airflow.Type: GrantFiled: May 23, 2019Date of Patent: October 18, 2022Assignees: Colorado State University Research Foundation, Access Sensor Technologies LLCInventors: John Volckens, Daniel D. Miller-Lionberg, Josephine Hofstetter, Casey William Quinn, Ellison Carter, David Leith
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Patent number: 11360002Abstract: A portable sampling device includes a housing at least partially enclosing an inner chamber and an airflow assembly disposed within the inner chamber and comprising a portion of an airflow path. The airflow assembly includes a portion of a printed circuit board (PCB); a manifold configured to be sealably coupled to the portion of the PCB to define at least one airflow channel disposed between an inner surface of the manifold and an outer surface of the PCB; and one or more pumping elements positioned on the PCB.Type: GrantFiled: October 15, 2019Date of Patent: June 14, 2022Assignee: Colorado State University Research FoundationInventors: Daniel D. Miller-Lionberg, Casey William Quinn, John Volckens, David Leith
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Publication number: 20210196244Abstract: A portable sampler, the sampler including a sampler assembly having a housing that includes a receiver defined therein for interchangeably receiving a number of removable inlet assemblies, the removable inlet assemblies including a respirable inlet assembly and a thoracic inlet assembly. The respirable inlet assembly includes a hybrid cyclone assembly, the hybrid cyclone assembly including an impaction stage and a cyclone in series. The thoracic inlet assembly includes an inlet slot configured to function as a size-selective inlet. Another thoracic inlet assembly includes a housing having a number of openings configured to receive a sample airflow; an inlet insert through which an inlet aperture is defined; a prequalification chamber defined between a lower surface of the housing and an upper surface of the inlet insert; and a protrusion extending downward from the lower surface of the housing into the inlet aperture of the inlet insert to from an inlet slot.Type: ApplicationFiled: December 18, 2020Publication date: July 1, 2021Inventors: David Leith, John Volckens, Christian L'Orange, Daniel D. Miller-Lionberg
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Publication number: 20210190646Abstract: A portable sampling device includes a sampling housing at least partially enclosing an inner chamber; at least one pumping element disposed within the inner chamber and configured to facilitate airflow through the device; and at least one gas sensor disposed within the inner chamber and configured to detect and/or characterize one or more gases in the airflow.Type: ApplicationFiled: May 23, 2019Publication date: June 24, 2021Inventors: John Volckens, Daniel D. Miller-Lionberg, Josephine Hofstetter, Casey William Quinn, Carter Ellison, David Leith
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Publication number: 20200049598Abstract: A portable sampling device includes a housing at least partially enclosing an inner chamber and an airflow assembly disposed within the inner chamber and comprising a portion of an airflow path. The airflow assembly includes a portion of a printed circuit board (PCB); a manifold configured to be sealably coupled to the portion of the PCB to define at least one airflow channel disposed between an inner surface of the manifold and an outer surface of the PCB; and one or more pumping elements positioned on the PCB.Type: ApplicationFiled: October 15, 2019Publication date: February 13, 2020Inventors: Daniel D. Miller-Lionberg, Casey William Quinn, John Volckens, David Leith
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Patent number: 10488305Abstract: A sampling device is constructed having an airflow path from a size-selective inlet to a device outlet, without using any tubing. The size-selective inlet includes at least one of an impactor, a filter, a cyclone, and an inhalable inlet. The device includes a sampling assembly configured to be removably coupled directly to a sampling device housing (e.g., without using tubing), and an airflow assembly that may be constructed without using tubing.Type: GrantFiled: February 25, 2017Date of Patent: November 26, 2019Assignee: Colorado State University Research FoundationInventors: Daniel D. Miller-Lionberg, Casey William Quinn, John Volckens, David Leith
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Publication number: 20170370809Abstract: A sampling device is constructed having an airflow path from a size-selective inlet to a device outlet, without using any tubing. The size-selective inlet includes at least one of an impactor, a filter, a cyclone, and an inhalable inlet. The device includes a sampling assembly configured to be removably coupled directly to a sampling device housing (e.g., without using tubing), and an airflow assembly that may be constructed without using tubing.Type: ApplicationFiled: February 25, 2017Publication date: December 28, 2017Inventors: Daniel D. Miller-Lionberg, Casey William Quinn, John Volckens, David Leith
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Patent number: 9482620Abstract: Methods and systems for characterizing particles in an aerosol are disclosed. A system includes a collection container that utilizes the principles of elutriation to collect particles of selected aerodynamic diameter ranges within a measurement region. A particle detector is used to detect and characterize particles that have settled into the measurement region.Type: GrantFiled: October 21, 2015Date of Patent: November 1, 2016Assignee: Colorado State University Research FoundationInventors: John Volckens, Kimberly Anderson, David Leith, Mwangi T. Ndonga, Azer Yalin, Christopher M. Limbach
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Publication number: 20160109349Abstract: Methods and systems for characterizing particles in an aerosol are disclosed. A system includes a collection container that utilizes the principles of elutriation to collect particles of selected aerodynamic diameter ranges within a measurement region. A particle detector is used to detect and characterize particles that have settled into the measurement region.Type: ApplicationFiled: October 21, 2015Publication date: April 21, 2016Inventors: John Volckens, Kimberly Anderson, David Leith, Mwangi T. Ndonga, Azer Yalin, Christopher M. Limbach
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Patent number: 6910758Abstract: A method of forming an opening through a substrate having a first side and a second side opposite the first side includes forming spaced stops in the first side of the substrate, partially forming a first portion of the opening in the substrate from the second side by a first process, further forming the first portion of the opening in the substrate from the second side by a second process, including forming the first portion of the opening to the spaced stops, and forming a second portion of the opening in the substrate from the first side, including forming the second portion of the opening between the spaced stops.Type: GrantFiled: July 15, 2003Date of Patent: June 28, 2005Assignee: Hewlett-Packard Development Company, L.P.Inventors: Martha A. Truninger, Steven David Leith, Jeffery S. Hess
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Patent number: 6321608Abstract: A miniature, passive aerosol particle sampler comprises a scanning electron microscopy mount provided with a collection surface and a removable mesh cover comprising a spacer ring and a mesh sheet. A sampling and analysis method comprises scanning electron microscopy and image analysis to determine a particle-count size distribution. A deposition velocity model comprising a theoretical component and an empirical component is used to determine from the particle-count size distribution the average airborne mass concentration of aerosol particles to which the sampler was exposed.Type: GrantFiled: April 7, 2000Date of Patent: November 27, 2001Assignee: The University of North Carolina - Chapel HillInventors: Jeff Wagner, David Leith