Patents by Inventor Alexander Govyadinov

Alexander Govyadinov 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).

  • Microfluidic devices
    Patent number: 11110453
    Abstract: The present disclosure is drawn to microfluidic devices. In one example, a microfluidic device can include a microfluidic channel. A vent chamber can be in fluid communication with the microfluidic channel. A capillary break can be located between the microfluidic channel and the vent chamber. The capillary break can include a tapered portion and a narrowed opening with a smaller width than a width of the microfluidic channel. A vent port can vent gas from the vent chamber. The vent port can be located a distance away from the capillary break so that a fluid in the capillary break does not escape through the vent port.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: September 7, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Adam Higgins, Pavel Kornilovich
  • Bead packing in microfluidic channels
    Patent number: 11110456
    Abstract: A microfluidic bead-packing method includes activating a first micropump to transfer active microbeads through an inlet microchannel from a bead suspension reservoir to an adsorbing channel; packing the microbeads in the adsorbing channel; and activating a second micropump to reverse flow through at least a portion of the inlet microchannel and to transfer a sample fluid through the inlet microchannel from a sample reservoir to the adsorbing channel such that the sample fluid interacts with the packed microbeads.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: September 7, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Alexander Govyadinov, David P. Markel, Erik D. Torniainen
  • Microfluidic filtering system
    Patent number: 11097270
    Abstract: A microfluidic filtering system may include a first microfluidic channel, a first pump to move fluid along the first microfluidic channel in a first direction, a second microfluidic channel, a second pump to move fluid along the second microfluidic channel in a second direction opposite to the first direction and a filter channel extending between and interconnecting the first microfluidic channel and the second microfluidic channel.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: August 24, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Alexander Govyadinov, David P. Markel, Erik D. Torniainen
  • ANALYTE CAPTURING DEVICES WITH FLUIDIC EJECTION DEVICES
    Publication number: 20210245153
    Abstract: In one example in accordance with the present disclosure, an analyte capturing device is described. The analyte capturing device includes a first substrate having microfluidic channels disposed therein and a second substrate disposed on top of the first substrate. A chamber is disposed through the second substrate and captures beads therein, which beads adsorb analytes. The analyte capturing device includes at least one fluid ejection device disposed in the first substrate to draw an analyte-containing solution through the beads disposed within the chamber.
    Type: Application
    Filed: July 9, 2018
    Publication date: August 12, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Pavel Kornilovich, Daniel Curthoys, Hilary Ely, Alexander Govyadinov
  • CONDUCTIVITY-BASED LYSIS MONITORS
    Publication number: 20210238537
    Abstract: In one example in accordance with the present disclosure, a conductivity-based lysis monitor is described. The lysis monitoring device includes a lysing chamber to receive a cell to be lysed and at least one lysing device to rupture a cell membrane. At least one pair of electrodes are disposed in the lysing chamber to detect a level of conductivity in the lysing chamber. A controller of the device determines when the cell membrane has ruptured based on detected levels of conductivity in the lysing chamber.
    Type: Application
    Filed: August 10, 2018
    Publication date: August 5, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Diane R. Hammerstad, Viktor Shkolnikov
  • MICROFLUIDIC DEVICES TO DETECT FLUID PRIMING
    Publication number: 20210237058
    Abstract: A microfluidic device may include an impedance sensor located within a fluidic priming orifice within a fluidic channel of the microfluidic device, and control logic. The control logic is to force a current into the impedance sensor to sense the presence of a fluid within the fluidic channel at the locations of the impedance sensor, and determine if the fluid is primed into the fluidic channel based on the impedance values sensed by the impedance sensor.
    Type: Application
    Filed: August 9, 2018
    Publication date: August 5, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: James Michael Gardner, Daryl E. Anderson, Eric Martin, Alexander Govyadinov
  • CONDUCTIVITY-BASED REACTION CHAMBER CONTROL
    Publication number: 20210239634
    Abstract: In one example in accordance with the present disclosure, a sample Sample Preparation System preparation system is described. The system includes a reaction chamber to hold at least one fluid. An inlet impedance sensor of the system detects a level of conductivity through at least one inlet of the reaction chamber and an outlet impedance sensor detects a level of conductivity through at least one outlet of the reaction chamber. A controller of the system, based on measured levels of conductivity, determines a state of a reaction within the reaction chamber.
    Type: Application
    Filed: August 9, 2018
    Publication date: August 5, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Viktor Shkolnikov
  • Fluid ejection device
    Patent number: 11059290
    Abstract: A fluid ejection device includes a fluid slot, three laterally adjacent fluid ejection chambers each having a drop ejecting element therein, a fluid circulation path communicated with each of the three laterally adjacent fluid ejection chambers, and a fluid circulating element within the fluid circulation path, with at least two laterally adjacent fluid ejection chambers of the three laterally adjacent fluid ejection chambers to substantially simultaneously eject drops of fluid therefrom such that the drops of fluid are to coalesce during flight.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: July 13, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Tsuyoshi Yamashita, Nicholas McGuinness, David P Markel, Erik D Tornianen
  • SURFACE ENHANCED RAMAN SCATTERING NANO FINGER HEATING
    Publication number: 20210190694
    Abstract: A surface enhanced Raman scattering (SERS) sensor may include a substrate, an electrically conductive layer having a first portion spaced from a second portion by a gap, an electrically resistive layer in contact with and extending between the first portion and the second portion of the electrically conductive layer to form an electrically resistive bridge across the gap that heats the nano fingers in response to electrical current flowing across the bridge from the first portion to the second portion and nano fingers extending upward from the bridge.
    Type: Application
    Filed: April 20, 2016
    Publication date: June 24, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Ning GE, Anita ROGACS, Viktor SHKOLNIKOV, Alexander GOVYADINOV
  • MICROFLUIDIC PRESSURE SENSOR
    Publication number: 20210190616
    Abstract: A microfluidic pressure sensor may include a reference chamber, a sensed volume, a microfluidic channel connecting an interior of the reference chamber to an interior of the sensed volume, a volume of liquid contained and movable within the microfluidic channel while occluding the microfluidic channel and a sensor to output signals indicating positioning of the volume of liquid along the microfluidic channel. Positioning of the volume of liquid along microfluidic channel indicates a pressure of the sensed volume.
    Type: Application
    Filed: April 20, 2016
    Publication date: June 24, 2021
    Inventors: Ning Ge, Alexander Govyadinov, Anita Rogacs, Viktor Shkolnikov
  • MICROFLUIDIC DEVICES
    Publication number: 20210178385
    Abstract: In one example in accordance with the present disclosure, a microfluidic device is described. The microfluidic device includes a reservoir to contain a first thermally expandable fluid, a first heater to heat the thermally expandable fluid in the reservoir, a channel extending from the reservoir and connected to the reservoir at a first opening, and a liquid volume obstructing the channel.
    Type: Application
    Filed: November 26, 2018
    Publication date: June 17, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Daryl E. Anderson, George H. Corrigan III, Alexander Govyadinov
  • Fluid ejection device
    Patent number: 11027545
    Abstract: A fluid ejection device includes a fluid ejection chamber having a drop ejecting element therein, a first fluid channel to communicate a first fluid with the fluid ejection chamber, a second fluid channel to communicate a second fluid different than the first fluid with the fluid ejection chamber, and a fluid pump communicated with one of the first fluid channel and the second fluid channel. As such, the fluid ejection chamber is to selectively eject drops of the first fluid, the second fluid, and a combination of the first fluid and the second fluid therefrom.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: June 8, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Tracy A Lang, Alexander Govyadinov
  • SERIAL CELLULAR ANALYTICS
    Publication number: 20210154672
    Abstract: In one example in accordance with the present disclosure, a cellular analytic system is described. The cellular analytic system includes a series of analytic devices. Each analytic device includes 1) a separator to separate a cellular particle from a surrounding fluid, 2) an analyzer coupled to a first outlet of the separator to analyze the surrounding fluid, and 3) at least one lysing device coupled to at least a second outlet of the separator to rupture a membrane of the cellular particle. An outlet of the lysing device is fluidly coupled to a separator of a downstream analytic device.
    Type: Application
    Filed: August 10, 2018
    Publication date: May 27, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Viktor Shkolnikov, Alexander Govyadinov
  • NUCLEIC ACID SEPARATION
    Publication number: 20210121883
    Abstract: An example system includes an input channel to flow nucleic segments therethrough, a mixing portion coupled to the input channel, a separation chamber in fluid communication with the second end of the input channel, at least two output channels coupled to the chamber, and an integrated pump to facilitate flow through the separation chamber. The mixing portion is to include at least two different categories of beads having different sizes from each other and having a probe to attach to a corresponding nucleic acid segment. The separation chamber has a passive separation structure including an array of columns spaced apart to facilitate separation of the different categories of beads and attached corresponding nucleic acid segment into at least two flow paths based on a size of the category of the beads. Each output channel is to receive separated categories of beads and attached nucleic acid segments.
    Type: Application
    Filed: March 27, 2018
    Publication date: April 29, 2021
    Inventors: Viktor Shkolnikov, Alexander Govyadinov
  • Printing with an emulsion
    Patent number: 10946649
    Abstract: In an example implementation, a method of printing with an emulsion, includes generating an emulsion of non-water based fluid and water based fluid on a printhead, and ejecting the emulsion through a printhead nozzle.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: March 16, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Craig Olbrich
  • REFERENCE ELECTRODES FORMED PRIOR TO PERFORMANCE OF MEASUREMENTS
    Publication number: 20210072178
    Abstract: An example device includes a processor to connect to an electrode disposed within a microfluidic volume and to connect a second electrode that includes a surface of silver metal disposed within the microfluidic volume. The processor is to apply an electrical potential between the electrode and the second electrode when the microfluidic volume contains a fluid that contains chloride ions to form a layer of silver chloride on the surface of the second electrode. The processor is further to cease application of the electrical potential and operate the second electrode as a reference electrode in a measurement process performed within the microfluidic volume.
    Type: Application
    Filed: April 26, 2018
    Publication date: March 11, 2021
    Inventors: Sarah Gish, Tod Woodford, Alexander Govyadinov
  • TEMPERATURE-CYCLING MICROFLUIDIC DEVICES
    Publication number: 20210060548
    Abstract: The present disclosure is drawn to temperature-cycling microfluidic devices. In one example, a temperature-cycling microfluidic device can include a driver chip having a top surface and a heat exchange substrate having a top surface coplanar with the top surface of the driver chip. A fluid chamber can be located on the top surface of the driver chip. A first and second microfluidic loop can have fluid driving ends and fluid outlet ends connected to the fluid chamber and can include portions thereof located on the top surface of the heat exchange substrate. A first and second fluid actuator can be on the driver chip. The first and second fluid actuators can be associated with the fluid driving ends of the first and second microfluidic loops, respectively, to circulate fluid through the first and second microfluidic loops.
    Type: Application
    Filed: November 22, 2017
    Publication date: March 4, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Adam HIGGINS, Alexander GOVYADINOV, Michael W. CUMBIE
  • Microfluidic mixer
    Patent number: 10913039
    Abstract: One example provides a microfluidic mixing device that includes a main fluidic channel to provide main fluidic channel flow and a number of I-shaped secondary channels extending outwardly from a portion of the main fluidic channel. A number of inertial pumps are located within the I-shaped secondary channels to create serpentine flows in the direction of the main fluidic channel flow or create vorticity-inducing counterflow in the main fluidic channel.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: February 9, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Pavel Kornilovich, Erik D. Torniainen, David P. Markel
  • MICROFLUIDIC DEVICES
    Publication number: 20210031185
    Abstract: A method of operating a microfluidic device may include activating a fluid ejection actuator to eject an amount of fluid from a fluid ejection chamber through a nozzle, and activating a pump located within a micro-fluidic channel fluidically coupled to the fluid ejection actuator during a fluid ejection event to create a positive net flow from the pump to the fluid ejection chamber. The fluid ejection event may include a plurality of ejections of fluid from the nozzle.
    Type: Application
    Filed: March 13, 2018
    Publication date: February 4, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Chantelle Domingue, Paul A. Richards, Tommy D. Deskins
  • MICROFLUIDIC DEVICES
    Publication number: 20210031192
    Abstract: A microfluidic device may include a die package. The die package may include at least on fluidic die and an overmold material overmolding the fluidic die. The microfluidic device may also include a mesofluidic plate coupled to the die package. The mesofluidic plate includes at least one mesofluidic channel formed therein to fluidically couple the fluidic die.
    Type: Application
    Filed: March 12, 2018
    Publication date: February 4, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Pavel Kornilovich, Ross Warner, Alexander Govyadinov