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).

  • Patent number: 11938727
    Abstract: Fluid is continuously recirculated through a thermal fluid-ejection printhead. Prior to firing a thermal resistor of the printhead to thermally eject a drop of the fluid through a nozzle of the printhead, the fluid is recirculated on-demand through a chamber of the printhead between the nozzle and the thermal resistor. The thermal resistor is fired to thermally eject the drop of the fluid through the nozzle. The fluid has a concentration of solids greater than 12% by volume.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: March 26, 2024
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Alex Trubnikov, Ronald Albert Askeland
  • Publication number: 20240082839
    Abstract: A microfluidic device includes a chamber having sidewalls, a floor, a ceiling, and an inlet. The microfluidic device includes pillars extending from the floor to the ceiling of the chamber. Each pillar has an orientation relative to the inlet defined by a leading surface and a trailing corner opposite the leading corner. The trailing corner has an angle less than a threshold angle that is based on a fluidic contact angle. The orientations of the pillars relative to the inlet promote fluid flow from the inlet throughout the chamber without trapping gas at the sidewalls of the chamber.
    Type: Application
    Filed: January 22, 2021
    Publication date: March 14, 2024
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Carson DENISON, Erik D. TORNIAINEN, Richard W. SEAVER, Pavel KORNILOVICH, Alexander GOVYADINOV, Anand Samuel JEBAKUMAR
  • Patent number: 11899041
    Abstract: The present invention relates to a method for referencing a near-field measurement, e.g. in a scanning probe microscope.
    Type: Grant
    Filed: July 16, 2021
    Date of Patent: February 13, 2024
    Assignee: ATTOCUBE SYSTEMS AG
    Inventors: Ivan Malovichko, Florian Huth, Alexander A. Govyadinov, Marcus Diem
  • Publication number: 20240033728
    Abstract: A microfluidic processing system can include a reagent delivery network including an inlet microfluidic channel fluidly coupled to an outlet microfluidic channel via a microfluidic cross-channel. The microfluidic cross-channel can include a constriction region and a reagent storage chamber. The microfluidic processing system can also include a resistor positioned along the inlet microfluidic channel at a location to redirect fluid through the constriction region and into a reagent storage chamber, and process microfluidics fluidly coupled downstream from the outlet microfluidic channel.
    Type: Application
    Filed: July 29, 2022
    Publication date: February 1, 2024
    Applicant: Hewlett-Packard Development Company, L. P.
    Inventors: Viktor Shkolnikov, Alexander Govyadinov
  • Publication number: 20240033729
    Abstract: A reagent delivery network can include an inlet microfluidic channel, a microfluidic cross-channel branching off from the inlet microfluidic channel, a resistor positioned along the inlet microfluidic channel at a location to redirect fluid from the inlet microfluidic channel into the microfluidic cross-channel, and an outlet microfluidic channel having a side-wall opening connected to the microfluidic cross-channel. The outlet microfluidic channel can receive fluid from the microfluidic cross-channel. The microfluidic cross-channel can include a constriction region and a reagent storage chamber having reagent therein.
    Type: Application
    Filed: July 29, 2022
    Publication date: February 1, 2024
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Viktor Shkolnikov
  • Patent number: 11879844
    Abstract: An example device includes an array of sensor modules. A sensor module includes a body to be positioned in alignment with a planar target, a light source coupled to the body to emit light to the planar target along a source optical path, and a plurality of light sensors coupled to the body. Each light sensor is to sense a different wavelength of light received from the planar target along a sensor optical path. The sensor optical path is different from the source optical path. The bodies of the array of sensor modules are arranged in a planar tiling pattern with respect to a longitudinal axis of the planar target.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: January 23, 2024
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Brett E. Dahlgren, Brian John Keefe
  • Publication number: 20230415151
    Abstract: An example self-priming microfluidic structure can include a microfluidic channel including a floor and a ceiling. A channel height is defined as a distance between the floor and the ceiling. A channel height step can be in the floor, or ceiling, or both. The channel height downstream of the channel height step can be greater than the channel height upstream of the channel height step. An interior pillar can be positioned in the microfluidic channel extending from the floor to the ceiling. The interior pillar can include a widening portion at an upstream end of the interior pillar and a tapering portion at a downstream end of the interior pillar. The interior pillar can overlap the channel height step so that the interior pillar is partially upstream of the channel height step and partially downstream of the channel height step.
    Type: Application
    Filed: June 24, 2022
    Publication date: December 28, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Peiyun Wang, Pavel KORNILOVICH, Alexander GOVYADINOV, Noorashekin Binte JAMIL, Sarita JAIRAM, Jinghua ZHAO
  • Publication number: 20230381779
    Abstract: A method comprising receiving, at a microfluidic channel, a biologic sample including a cell and providing a magnetic field within the microfluidic channel using a first magnet, wherein the magnetic field attracts a first plurality of magnetic particles disposed within the microfluidic channel. The method further includes activating a first resistor disposed within the microfluidic channel to agitate a volume of fluid within the microfluidic channel, and in response, moving the first plurality of magnetic particles through the microfluidic channel to lyse the cell and to release cellular material from the cell.
    Type: Application
    Filed: October 20, 2020
    Publication date: November 30, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Viktor Shkolnikov
  • Publication number: 20230381723
    Abstract: An example microfluidic mixer can include an inlet microfluidic channel portion and a fluid splitting channel portion including an overpass microfluidic channel to receive fluid from a first side of the inlet microfluidic channel portion and an underpass microfluidic channel to receive fluid from a second side of the inlet microfluidic channel portion, where the underpass microfluidic channel extends under the overpass microfluidic channel such that the channels overlap at their respective downstream ends. A fluid recombining channel portion is downstream of the fluid splitting portion and includes an angled recombining surface having an acute angle with respect to a direction of fluid flow, where the angled recombining surface is between the downstream ends of the overpass and underpass microfluidic channels. An outlet microfluidic channel portion is fluidly connected downstream from the fluid recombining channel portion.
    Type: Application
    Filed: May 27, 2022
    Publication date: November 30, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Carson Denison, Richard W. SEAVER, Erik D. TORNIAINEN, Pavel KORNILOVICH, Alexander GOVYADINOV, Anand Samuel JEBAKUMAR, Oumnia EL FAJRI
  • Publication number: 20230372938
    Abstract: In one example in accordance with the present disclosure, a fluid analysis system is described. The fluid analysis system includes an inlet channel to an analysis chamber. The analysis chamber is to receive a fluid sample to be analyzed. The fluid analysis system also includes a fluid branch having a fluidic junction along the inlet channel and a gas chamber to house a volume of trapped gas, the gas chamber being in fluid communication with the fluid branch. The fluid analysis system also includes a sealing fluid delivery system to fill the fluid branch with a sealing fluid and a heater adjacent the gas chamber to heat the gas chamber such that the trapped gas expands to push the sealing fluid into the inlet channel to seal the analysis chamber.
    Type: Application
    Filed: September 14, 2021
    Publication date: November 23, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Alexander Govyadinov
  • Patent number: 11815430
    Abstract: A nucleic acid detection device includes a microfluidic opening and a sensor stack. The sensor stack includes an electrochemical electrode and a photodetector. The electrochemical electrode is formed of a conductive material that is transparent to a fluorescent emission, the electrochemical electrode including a first side and an opposite second side, wherein the first side is exposed to the microfluidic opening. The photodetector is positioned relative to the second side of the electrochemical electrode to optically receive the fluorescent emission when passed through the electrochemical electrode.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: November 14, 2023
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Brett E. Dahlgren
  • Patent number: 11807019
    Abstract: A printing fluid pen includes a plurality of fluid ports, a pressure regulator in fluid communication with a first fluid port, and a valve in fluid communication with a second fluid port. The first fluid port is to deliver printing fluid to a fluid ejection device, and the second fluid port is to direct printing fluid out of the pen. In response to negative pressure, the valve is to open to enable fluids within the pen to exit via the second port.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: November 7, 2023
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Ronald Albert Askeland, Blair A. Butler, Ronald J. Ender, Craig L. Malik, Daniel D. Dowell, Seth Stephen Haddix, Si-Lam J. Choy, Alexander Govyadinov
  • Patent number: 11801509
    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: Grant
    Filed: August 10, 2018
    Date of Patent: October 31, 2023
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Viktor Shkolnikov, Alexander Govyadinov
  • Patent number: 11794186
    Abstract: An example microfluidic device comprises a plurality of fluidic channels and a fluidic multiplexor. The fluidic multiplexor includes a plurality of fluidic micro-valves fluidically coupled to the plurality of fluidic channels, and a plurality of control lines that cross the plurality of fluidic channels proximal to the plurality of fluidic micro-valves.
    Type: Grant
    Filed: July 23, 2021
    Date of Patent: October 24, 2023
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Alexander Govyadinov, Anand Samuel Jebakumar
  • Publication number: 20230330675
    Abstract: An example microfluidic structure can include a first microfluidic channel segment in a first elevation plane, a second microfluidic channel segment in a second elevation plane, and a transverse microfluidic channel segment connecting the first microfluidic channel segment to the second microfluidic channel segment. An interior pillar can be positioned at the transverse microfluidic channel segment. The interior pillar can have a tapered downstream edge. The tapered downstream edge can be angled in the first or second elevation plane at an acute angle. A fluid cross-sectional area can increase in the fluid flow direction along the tapered downstream edge.
    Type: Application
    Filed: April 15, 2022
    Publication date: October 19, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Oumnia El Fajri, Richard W. SEAVER, Erik D. TORNIAINEN, Anand Samuel JEBAKUMAR, Pavel KORNILOVICH, Alexander GOVYADINOV, Carson DENISON
  • Publication number: 20230330673
    Abstract: An example microfluidic structure can include a first microfluidic channel segment in a first elevation plane, a second microfluidic channel segment in a second elevation plane, and a transverse microfluidic channel segment connecting the first microfluidic channel segment to the second microfluidic channel segment. An angled exterior wall segment can be at the transverse microfluidic channel segment. The angled exterior wall segment can be angled in the first or second elevation plane at an acute angle with respect to a direction of fluid flow through the first or second microfluidic channel segment. A fluid cross-sectional area can increase in the fluid flow direction along the angled exterior wall segment.
    Type: Application
    Filed: April 15, 2022
    Publication date: October 19, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Oumnia El Fajri, Richard W. SEAVER, Erik D. TORNIAINEN, Anand Samuel JEBAKUMAR, Pavel KORNILOVICH, Alexander GOVYADINOV, Carson DENISON
  • Publication number: 20230303996
    Abstract: In one example in accordance with the present disclosure, a fluid manipulation system is described. The fluid manipulation system includes a microfluidic channel through which fluid is to flow. The fluid includes biomolecules to be separated. The fluid manipulation system also includes at least one array of biomolecule-capturing pillars disposed within the microfluidic channel to capture biomolecules from the fluid. Barriers rise from a surface of the microfluidic channel. The barriers span a width of the microfluidic channel orthogonal to a flow of the fluid to induce vortices in the fluid flow.
    Type: Application
    Filed: August 28, 2020
    Publication date: September 28, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Jacob Shane Sasser, Alexander Govyadinov, Brian J. Keefe, David S. Clague, Natalie Taylor Weisenburger, Nicolas Robert Medjo
  • Publication number: 20230287479
    Abstract: An example method, consistent with the present disclosure, includes receiving in a microfluidic channel, a fluid sample and a reagent, where the reagent includes a reporter nucleic acid labeled with a detectable ligand. The method further includes identifying a target nucleic acid in the fluid sample using a guide ribonucleic acid (gRNA) and a programmable nuclease immobilized in a side channel fluidically coupled to the microfluidic channel. Responsive to identifying the target nucleic acid in the fluid sample, the method includes causing cleavage of the detectable ligand, and detecting the detectable ligand from the cleaved reporter nucleic acid in the side channel.
    Type: Application
    Filed: July 21, 2020
    Publication date: September 14, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Viktor Shkolnikov, Alexander Govyadinov
  • Publication number: 20230285970
    Abstract: An example apparatus comprises a first microfluidic channel fluidically coupled to a first reservoir containing a carrier fluid, the first microfluidic channel including a reaction region, a fluid droplet generator, and a fluid ejector fluidically coupled to the first microfluidic channel and disposed downstream from the reaction region of the first microfluidic channel. The fluid droplet generator includes a portion of the first microfluidic channel and a second microfluidic channel that intersects the first microfluidic channel and is fluidically coupled to a second reservoir containing a reaction fluid, where the reaction fluid including a plurality of cells and fluorescently-labeled capture reagents to form reaction products with a target molecule secreted by the plurality of cells.
    Type: Application
    Filed: March 11, 2022
    Publication date: September 14, 2023
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Viktor SHKOLNIKOV, Alexander GOVYADINOV
  • Publication number: 20230280263
    Abstract: An example system includes an input channel having a first end and a second end to receive particles through the first end, a sensor to categorize particles in the input channel into one of at least two categories, and at least two output channels. Each output channel is coupled to the second end of the input channel to receive particles from the input channel, and each output channel is associated with at least one category of the at least two categories. Each output channel has a corresponding pump operable, based on the categorization of a detected particle in a category associated with a different output channel, to selectively slow, stop, or reverse a flow of particles into the output channel from the input channel.
    Type: Application
    Filed: May 12, 2023
    Publication date: September 7, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Pavel Kornilovich