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).

  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Publication number: 20210023852
    Abstract: A fluid ejection device may include a first channel having a first end and a second end, a first drop ejector along the first channel, a second channel having a first end and a second end, a second drop ejector along the second channel, a third channel extending between and connecting the first end of the first channel and the first end of the second channel, a fourth channel extending between and connecting the second end of the firs channel and the second end of the second channel and a fifth channel extending between and connecting the third channel and the fourth channel.
    Type: Application
    Filed: October 8, 2020
    Publication date: January 28, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D. Torniainen, David P. Markel
  • Publication number: 20210010488
    Abstract: The present disclosure is drawn to inertial pumps. An inertial pump can include a microfluidic channel, a fluid actuator located in the microfluidic channel, and a check valve located in the microfluidic channel. The check valve can include a moveable valve element, a narrowed channel segment located upstream of the moveable valve element, and a blocking element formed in the microfluidic channel downstream of the moveable valve element. The narrowed channel segment can have a width less than a width of the moveable valve element so that the moveable valve element can block fluid flow through the check valve when the moveable valve element is positioned in the narrowed channel segment. The blocking element can be configured such that the blocking element constrains the moveable valve element within the check valve while also allowing fluid flow when the moveable valve element is positioned against the blocking element.
    Type: Application
    Filed: April 7, 2017
    Publication date: January 14, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Erik D. Torniainen, Alexander Govyadinov, Pavel Kornilovich, David P. Markel
  • Publication number: 20210001337
    Abstract: An example system includes an input channel having a first end and a second end to receive particles through the first end, a separation chamber, at least two output channels, and an integrated pump to facilitate flow through the separation chamber. The separation chamber is in fluid communication with the second end of the input channel. The separation chamber has a passive separation structure, the passive separation structure including an array of columns spaced apart to facilitate separation of particles in a flow based on a size of the particles. Each output channel is in fluid communication with the separation chamber to receive separated particles. The integrated pump is positioned within at least one of the input channel or one of the at least two output channels.
    Type: Application
    Filed: March 27, 2018
    Publication date: January 7, 2021
    Inventors: Viktor Shkolnikov, Alexander Govyadinov, Pavel Kornilovich, Erik D. Torniainen
  • Patent number: 10882045
    Abstract: Examples include polymerase chain reaction (PCR) devices. Example PCR devices comprise a fluid input, ejection nozzles, and a set of microfluidic channels that fluidly connect the fluid input and the ejection nozzles. Each microfluidic channel comprises a reaction chamber, and examples further comprise at least one heating element, where the at least one heating element is positioned in the reaction chamber of each microfluidic channel. The at least one heating element is to heat fluid in the reaction chamber of each fluid channel. The device may eject fluid via the ejection nozzles.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: January 5, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Erik D. Torniainen, Alexander Govyadinov, Pavel Kornilovich, David P. Markel
  • Publication number: 20200406258
    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: Application
    Filed: April 7, 2017
    Publication date: December 31, 2020
    Applicant: Hewlett-Packand Development Company, L.P.
    Inventors: Alexander Govyadinov, Adam HIGGINS, Pavel KORNILOVICH
  • Patent number: 10857536
    Abstract: Examples include polymerase chain reaction (PCR) devices. Example PCR devices comprise a fluid input, a fluid output, and a set of microfluidic channels that fluidly connect the fluid input and the fluid output. Each microfluidic channel comprises a reaction chamber, and examples further comprise at least one heating element, where the at least one heating element is positioned in the reaction chamber of each microfluidic channel. The at least one heating element is to heat fluid in the reaction chamber of each fluid channel, and the at least one heating element is to pump fluid to the reaction chamber and from the reaction chamber of each microfluidic channel.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: December 8, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Erik D Torniainen, Alexander Govyadinov, Pavel Kornilovich, David P Markel
  • Patent number: 10859074
    Abstract: According to an example, a microfluidic device may include a transport channel having an inlet and an outlet and a plurality of pump loops extending along the transport channel. Each of the plurality of pump loops may include a first branch, a second branch, and a connecting section connecting the first branch and the second branch. The first branch may include a first opening and the second branch may include a second opening, in which the first opening and the second opening are in direct fluid communication with the transport channel. The pump loops may also each include an actuator positioned in the first branch, in which the actuators in the pump loops are to be activated to induce a traveling wave that is to transport the fluid through the transport channel from the inlet to the outlet.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: December 8, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Alexander Govyadinov
  • Patent number: 10850511
    Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber communicated with the fluid slot and including a second drop ejecting element, a fluid circulation path communicated with the first fluid ejection chamber and the second fluid ejection chamber, and a fluid circulating element within the fluid circulation path.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: December 1, 2020
    Inventors: Alexander Govyadinov, Tsuyoshi Yamashita, Erik D. Torniainen, Nicholas McGuinness, David P. Markel
  • Publication number: 20200353748
    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: Application
    Filed: July 29, 2016
    Publication date: November 12, 2020
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander GOVYADINOV, Tsuyoshi YAMASHITA, Nicholas McGUINNESS, David P MARKEL, Erik D TORNIANEN
  • Patent number: 10828639
    Abstract: A fluid exit passage is at a location along a microfluidic channel. A fluid displacement device is proximate the location along the microfluidic channel. A constituent locator distinguishes a target constituent in a fluid within the microfluidic channel from remaining non-target constituents and locate the target constituent proximate the fluid exit passage. A controller selectively actuates the fluid displacement device when the target constituent is proximate the fluid exit passage to discharge the target constituent from the microfluidic channel through the fluid exit passage.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: November 10, 2020
    Assignee: Hewlett-Packard Development Company L.P.
    Inventors: Anita Rogacs, Alexander Govyadinov
  • Publication number: 20200333238
    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: January 29, 2018
    Publication date: October 22, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander GOVYADINOV, Pavel KORNILOVICH
  • Patent number: 10807376
    Abstract: A fluid ejection device may include a first channel having a first end and a second end, a first drop ejector along the first channel, a second channel having a first end and a second end, a second drop ejector along the second channel, a third channel extending between and connecting the first end of the first channel and the first end of the second channel, a fourth channel extending between and connecting the second end of the first channel and the second end of the second channel and a fifth channel extending between and connecting the third channel and the fourth channel.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: October 20, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D. Torniainen, David P. Markel
  • Patent number: 10780705
    Abstract: A fluid ejection device includes a fluid slot, two laterally adjacent fluid ejection chambers each having a drop ejecting element therein, a fluid circulation path communicated with the fluid slot and each of the two laterally adjacent fluid ejection chambers, and a fluid circulating element within the fluid circulation path, with the fluid circulating element laterally adjacent at least one of the two laterally adjacent fluid ejection chambers, and the two 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: September 22, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Nicholas McGuinness, Alexander Govyadinov, Tsuyoshi Yamashita, Erik D Torniainen, David P Markel