Patents by Inventor Alexander A. Govyadinov

Alexander A. 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).

  • Cell lysis
    Patent number: 10696939
    Abstract: In an example implementation, a method of cell lysis includes moving cell fluid from a first reservoir through a microfluidic channel toward a second reservoir, activating a lysing element multiple times as a cell from the cell fluid passes through the microfluidic channel, and moving lysate fluid that results from the activating through the microfluidic channel and into the second reservoir.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: June 30, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D. Torniainen, David P. Markel, Pavel Kornilovich
  • TEMPERATURE-CONTROLLING MICROFLUIDIC DEVICES
    Publication number: 20200197930
    Abstract: The present disclosure is drawn to microfluidic devices. In one example, a microfluidic device can include a driver chip and a fluid chamber located over the driver chip. First and second microfluidic loops can have fluid driving ends and fluid outlet ends connected to the fluid chamber. The first and second microfluidic loops can include a portion thereof located outside a boundary of the driver chip. A first fluid actuator can be on the driver chip associated with the fluid driving end of the first microfluidic loop to circulate fluid through the first microfluidic loop. A second fluid actuator can be on the driver chip associated with the fluid driving end of the second microfluidic loop to circulate fluid through the second microfluidic loop.
    Type: Application
    Filed: November 22, 2017
    Publication date: June 25, 2020
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Adam HIGGINS, Alexander GOVYADINOV
  • MICROFLUIDIC FLUID FLOW IN A TARGET FLUID
    Publication number: 20200179924
    Abstract: One example includes a device that may include a heating element and a molecular binding site. The heating element may heat a fluid volume, interfaced with the heating element, in response to a voltage being applied to the heating element, the heat transforming the fluid volume from a liquid state into a vaporized state to generate fluid motion within the fluid volume. The molecular binding site may be disposed proximate to the heating element, in which a portion of the fluid volume expands when the fluid volume transforms from the liquid state into the vaporized state, the vaporized state of the fluid volume generating the fluid motion within a target fluid that is disposed within the molecular binding site.
    Type: Application
    Filed: July 19, 2017
    Publication date: June 11, 2020
    Inventors: David P. MARKEL, Erik D TORNIAINEN, Alexander GOVYADINOV, Pavel KORNILOVICH
  • TEST SAMPLE DEVICES AND METHODS
    Publication number: 20200164371
    Abstract: A sample test device is provided that includes a body having an insertion surface spaced apart from a distal end portion and a fluid manipulating assembly disposed in the distal end portion. A mixing receptacle is defined in the fluid manipulating assembly and provides a volume to mix a test mixture. A plunger is disposed in the body and creates a positive air pressure in the mixing receptacle when inserted into the body. A test die is disposed in the fluid manipulation assembly and a fluid path extends from the mixing receptacle to the test die. Activation of the plunger creates a positive pressure in the mixing receptacle to force the test mixture to flow from the mixing receptacle to the test die.
    Type: Application
    Filed: July 18, 2017
    Publication date: May 28, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Jeremy Harlan Donaldson, Stephen Lee Frey, Alexander Govyadinov
  • Microfluidic flow sensor
    Patent number: 10655994
    Abstract: An apparatus includes a microfluidic channel and a flow sensor along the microfluidic channel. The flow sensor includes a heat emitting resistor for connection to an electric current source, analytical parameter sensor and electronics. The heat emitting resistor has a resistance that varies in response to temperature. The electrical parameter sensor is to sense an electrical parameter of the heat emitting resistor that is based on the resistance of the heat emitting resistor. The electronics determine a flow based on the sensed electrical parameter.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: May 19, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D Torniainen, Pavel Kornilovich
  • TEST SAMPLE DEVICES AND METHODS
    Publication number: 20200147605
    Abstract: A sample test device is provided that includes a body having an insertion surface spaced apart from a distal end portion and a fluid manipulating assembly disposed in the distal end portion. A mixing receptacle is defined in the fluid manipulating assembly and provides a volume to mix a test mixture. A plunger is disposed in the body and creates a positive air pressure in the mixing receptacle when inserted into the body. A test die is disposed in the fluid manipulation assembly and a fluid path extends from the mixing receptacle to the test die. Activation of the plunger creates a positive pressure in the mixing receptacle to force the test mixture to flow from the mixing receptacle to the test die.
    Type: Application
    Filed: July 18, 2017
    Publication date: May 14, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Jeremy Harlan Donaldson, Stephen Lee Frey, Pavel Kornilovich, Alexander Govyadinov
  • Microfluidic filtering
    Patent number: 10646868
    Abstract: In an example implementation, a method of microfluidic filtering includes activating a first fluid pump within a microfluidic channel to cause a forward flow of fluid through the microfluidic channel and through a filter of a filter loop. The filter loop intersects the microfluidic channel at a loop entry and at a loop exit. The method includes activating a second fluid pump to cause a reverse flow of fluid through the filter.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: May 12, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Erik D. Torniainen, Nick McGuinness, David P. Markel, Alexander Govyadinov
  • LIGHTING FOR ADDITIVE MANUFACTURING
    Publication number: 20200139627
    Abstract: In one example, a non-transitory processor readable medium having instructions thereon that when executed cause an additive manufacturing machine to expose build material to a light source emitting monochromatic light within a band of wavelengths that includes a peak light absorption of a liquid coalescing agent to be dispensed on to the build material.
    Type: Application
    Filed: January 6, 2020
    Publication date: May 7, 2020
    Inventors: Krzysztof Nauka, Sivapackia Ganapathiappan, Lihua Zhao, Howard S. Tom, Yan Zhao, Hou T. Ng, James Elmer Abbott, JR., Alexander Govyadinov, Vladek Kasperchik
  • Fluid ejection device
    Patent number: 10632749
    Abstract: A fluid ejection device includes a fluid slot, a plurality of fluid ejection chambers communicated with the fluid slot, a plurality of drop ejecting elements one of each within one of the fluid ejection chambers, a plurality of fluid circulation channels each communicated with the fluid slot and one or more of the fluid ejection chambers, and a plurality of fluid circulating elements each communicated with one or more of the fluid circulation channels. The fluid circulating elements are to provide intermittent circulation of fluid from the fluid slot through the one or more of the fluid circulation channels and the one or more of the fluid ejection chambers.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: April 28, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Chris Bakker
  • Fluid ejection device
    Patent number: 10632743
    Abstract: A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: April 28, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Paul A Richards, Chris Bakker
  • Microfluidic transport
    Patent number: 10589269
    Abstract: A device for microfluidic transport includes a first fluid reservoir, a second fluid reservoir spaced from the first fluid reservoir, a main fluid channel communicated with the first fluid reservoir and the second fluid reservoir, an auxiliary fluid channel communicated with the main fluid channel, and a fluid actuator within the auxiliary fluid channel asymmetric to the main fluid channel such that operation of the fluidic actuator is to induce fluid flow in the main fluid channel from the first reservoir toward the second reservoir.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: March 17, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D Torniainen, Pavel Kornilovich
  • FLUID EJECTION DEVICE
    Publication number: 20200079085
    Abstract: A fluid ejection device includes a fluid slot, a fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the fluid ejection chamber, a fluid circulation channel communicated at one end with the fluid slot and communicated at another end with the fluid ejection chamber, a fluid circulating element within the fluid circulation channel, and a channel wall separating the fluid ejection chamber and the fluid circulation channel. The fluid circulation channel includes a channel loop, and a width of the channel wall is based on a width of the channel loop and a width of the fluid ejection chamber.
    Type: Application
    Filed: November 15, 2019
    Publication date: March 12, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Paul A. Richards
  • MICROFLUIDIC MIXER
    Publication number: 20200030760
    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: Application
    Filed: July 6, 2016
    Publication date: January 30, 2020
    Inventors: Alexander GOVYADINOV, Pavel KORNILOVICH, Erik D. TORNIAINEN, David P. MARKEL
  • FLUID EJECTION DEVICE
    Publication number: 20200031135
    Abstract: A fluid ejection device includes a fluid slot, two laterally adjacent fluid ejection chambers each communicated with the fluid slot and having a drop ejecting element therein, and a fluid circulation path communicated with each of the two laterally adjacent fluid ejection chambers and having a fluid circulating element therein, with the two laterally adjacent fluid ejection chambers to concurrently eject drops of fluid therefrom such that the drops of fluid are to coalesce during flight.
    Type: Application
    Filed: January 23, 2017
    Publication date: January 30, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Tsuyoshi Yamashita, Alexander Govyadinov, Nick McGuinness, Erik D Torniainen, David P Markel
  • MICROFLUIDIC DEVICES
    Publication number: 20200009558
    Abstract: The present disclosure is drawn to microfluidic devices. In one example, a microfluidic device can include a first covered fluid feed slot in fluid communication with a first microfluidic channel and a second covered fluid feed slot in fluid communication with a second microfluidic channel. The first microfluidic channel can be formed adjacent to the second microfluidic channel but not in fluid communication with the second microfluidic channel. The first covered fluid feed slot can include a first fluid feed hole for filling a fluid into the first covered fluid feed slot. The second covered fluid feed slot can also include a second fluid feed hole for filling a fluid into the second covered fluid feed slot.
    Type: Application
    Filed: April 7, 2017
    Publication date: January 9, 2020
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander GOVYADINOV, Adam HIGGINS, Pavel KORNILOVICH
  • FLUID LEVEL SENSOR
    Publication number: 20200003601
    Abstract: A fluid reservoir may include a number of metal traces along a wall of the fluid reservoir, and a number of fuse circuits along a length of the metal traces. Each of the fuse circuits may include a fuse along a length of a respective metal trace, and a number of parasitic resistive elements in parallel to the fuse. The parasitic resistive elements reduce current flow through the fuse in the presence of a fluid contained within the fluid reservoir.
    Type: Application
    Filed: February 23, 2017
    Publication date: January 2, 2020
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Ning GE, Chien-Hua Chen, Alexander Govyadinov
  • FLUID EJECTION DEVICE
    Publication number: 20190381793
    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: Application
    Filed: January 31, 2017
    Publication date: December 19, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Tracy A Lang, Alexander Govyadinov
  • Fluid ejection device
    Patent number: 10500850
    Abstract: A fluid ejection device includes a fluid slot, a fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the fluid ejection chamber, a fluid circulation channel communicated at one end with the fluid slot and communicated at another end with the fluid ejection chamber, a fluid circulating element within the fluid circulation channel, and a channel wall separating the fluid ejection chamber and the fluid circulation channel. The fluid circulation channel includes a channel loop, and a width of the channel wall is based on a width of the channel loop and a width of the fluid ejection chamber.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: December 10, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Paul A Richards
  • MICROFLUIDIC NETWORK
    Publication number: 20190366339
    Abstract: An apparatus may include a first microfluidic valve coupled between a first reservoir and a fluid channel. The first microfluidic valve may include a fluid agitator to break a meniscus formed at an air-fluid interface and release fluid from the first reservoir into the fluid channel in response to an electrical signal. The apparatus may also include a second microfluidic valve coupled between a second reservoir and the fluid channel. Fluid from the first reservoir and fluid from the second reservoir mix in the fluid channel.
    Type: Application
    Filed: February 15, 2017
    Publication date: December 5, 2019
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Alexander Govyadinov, Nick McGuinness
  • Drop ejection based flow sensor calibration
    Patent number: 10495507
    Abstract: A droplet of fluid having a predetermined drop weight is ejected from a microfluidic channel. Electrical signals are received from a sensor in the microfluidic channel, wherein the electrical signals vary in response to the ejection of the droplet of fluid. The electrical signals of the sensor are calibrated to a rate of flow of fluid through the microfluidic channel based on a number of droplets ejected and the predetermined drop weight of each droplet.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: December 3, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Erik D Torniainen, Pavel Kornilovich, David P Markel