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).

  • 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
  • Imaging apparatus and methods using diffraction-based illumination
    Patent number: 10459241
    Abstract: Imaging apparatus and methods using diffraction-based illumination are disclosed. An example apparatus includes a diffraction grating to redirect light from a light source toward a sample to thereby illuminate the sample. The example apparatus also includes an image sensor to detect a diffraction pattern created by the illuminated sample.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: October 29, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Charles M Santori, Alexander Govyadinov
  • Print head sensing chamber circulation
    Patent number: 10449776
    Abstract: A print head has a fluid slot and a sensing chamber having a first port connected to the fluid slot and a second port. The sensing chamber contains an ink level sensor. A circulation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the circulation passage.
    Type: Grant
    Filed: September 8, 2018
    Date of Patent: October 22, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Adam L. Ghozeil, Boon Bing Ng, Patrick Leonard, Raymond Connolly
  • MICROFLUIDIC DEVICE FOR FLUID MIXTURE
    Publication number: 20190299176
    Abstract: Examples include microfluidic devices. Example microfluidic devices comprise a first microfluidic channel, a second microfluidic channel, and microfluidic output channel fluidly coupled to the first microfluidic channel and the second microfluidic channel via a fluid junction. The example device comprises a first fluid actuator disposed in the first microfluidic channel to actuate to thereby pump a first fluid into the microfluidic output channel, and the example device comprises a second fluid actuator disposed in the second microfluidic channel to actuate to pump a second fluid into the microfluidic output channel. The first fluid actuator and the second fluid actuator are to actuate to thereby pump a fluid mixture of the first fluid and the second fluid into the microfluidic output channel.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 3, 2019
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: David MARKEL, Pavel KORNILOVICH, Erik D TORNIAINEN, Alexander GOVYADINOV, Viktor SHKOLNIKOV, Diane R HAMMERSTAD, Ning GE
  • Polymerase chain reaction systems
    Patent number: 10415086
    Abstract: In one embodiment, a polymerase chain reaction (PCR) system includes a mixture chamber, a denature chamber, an annealing chamber, an extension chamber, and a product chamber, that are fluidically coupled to one another through a plurality of microfluidic channels. An inertial pump is associated with each microfluidic channel, and each inertial pump includes a fluid actuator integrated asymmetrically within its associated microfluidic channel. The fluid actuators are capable of selective activation to circulate fluid between the chambers in a controlled cycle.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: September 17, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Erik D. Tornianinen, Alexander Govyadinov, David P. Markel
  • FLUID EJECTION DEVICE
    Publication number: 20190255845
    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: Application
    Filed: May 3, 2019
    Publication date: August 22, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Tsuyoshi Yamashita, Erik D. Torniainen, Nicholas McGuinness, David P. Markel
  • Microfluidic optical fluid sensor
    Patent number: 10365226
    Abstract: Provided in one example is an apparatus, including a substrate supporting a microfluidic channel, a bubble jet inertial pump supported by the substrate adjacent the microfluidic channel to pump fluid through the microfluidic channel and an optical sensor on a first side of the microfluidic channel. A light emitter on a second side of the microfluidic channel is to pass light across the microfluidic channel to the optical sensor.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: July 30, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Charles M. Santori, Anita Rogacs, Diane R. Hammerstad, Manish Giri
  • Circulation in a fluid ejection device
    Patent number: 10336090
    Abstract: A fluid ejection device may include a discharge port, an energy generating element to discharge liquid through the discharge port, a first liquid supply on a first side of the discharge port, a second liquid supply on a second side of the discharge port opposite the first side, a first liquid flow path extending from the first liquid supply to the discharge port, a second liquid flow path extending from the second liquid supply to the discharge port and a fluid displacement actuator in the first liquid flow path.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: July 2, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Craig Olbrich, Brian M. Taff
  • Fluid ejection device with a fluid recirculation channel
    Patent number: 10336070
    Abstract: According to an example, a fluid ejection device may include a fluid feed slot, a plurality of fluid ejection chambers in fluid communication with the fluid feed slot, a plurality of drop ejecting elements, in which a drop ejecting element of the plurality of drop ejecting elements is positioned within each of the plurality of fluid ejection chambers, a fluid circulation channel in fluid communication at a first end of the fluid circulation channel with the fluid feed slot and in fluid communication at multiple second ends of the fluid circulation channel with the plurality of fluid ejection chambers, and a fluid circulating element within the fluid circulation channel. The fluid ejection device may also include a bubble dissipating structure positioned within the fluid circulation channel outside of the plurality of fluid ejection chambers.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: July 2, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Nicholas Matthew Cooper McGuinness, Alexander Govyadinov, Chris Bakker, Lawrence H. White, Paul A. Richards
  • MICROFLUIDIC DEVICE FOR FLUID MIXTURE
    Publication number: 20190176111
    Abstract: Examples include microfluidic devices. Example microfluidic devices comprise a first microfluidic channel, a second microfluidic channel, and microfluidic output channel fluidly coupled to the first microfluidic channel and the second microfluidic channel via a fluid junction. The example device comprises a fluid actuator disposed in the microfluidic output channel to actuate to thereby pump a first fluid and a second fluid into the microfluidic output channel.
    Type: Application
    Filed: July 8, 2016
    Publication date: June 13, 2019
    Inventors: David P. MARKEL, Erik D. TORNIAINEN, Alexander GOVYADINOV, Pavel KORNILOVICH
  • FLUID EJECTION DEVICE
    Publication number: 20190168512
    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 including a second drop ejecting element, and a fluid circulation path including a first portion communicated with the fluid slot and the second fluid ejection chamber, and a second portion communicated with the first fluid ejection chamber and the second fluid ejection chamber, with the fluid circulation path including a fluid circulating element within the first portion.
    Type: Application
    Filed: February 8, 2019
    Publication date: June 6, 2019
    Inventors: Alexander Govyadinov, Tsuyoshi Yamashita, Erik D. Torniainen
  • Fluid ejection device
    Patent number: 10308020
    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: October 27, 2015
    Date of Patent: June 4, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Tsuyoshi Yamashita, Erik D. Torniainen, Nicholas McGuinness, David P. Markel
  • BEAD PACKING IN MICROFLUIDIC CHANNELS
    Publication number: 20190151846
    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: Application
    Filed: July 12, 2016
    Publication date: May 23, 2019
    Inventors: Pavel KORNILOVICH, Alexander GOVYADINOV, David P. MARKEL, Erik D. TORNIAINEN
  • MICROFLUIDIC FILTERING SYSTEM
    Publication number: 20190143327
    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: Application
    Filed: July 15, 2016
    Publication date: May 16, 2019
    Inventors: Pavel KORNILOVICH, Alexander GOVYADINOV, David P. MARKEL, Erik D. TORNIAINEN
  • Microfluidic mixing device
    Patent number: 10286366
    Abstract: In one embodiment, a microfluidic mixing device includes a mixing channel, a fluid inlet chamber to pass fluids into the mixing channel, an axis-asymmetric mixing actuator integrated within the channel to cause fluid displacements that mix the fluids as they flow through the channel, and an outlet chamber to receive the mixed fluids.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: May 14, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D. Torniainen, David P. Markel, Pavel Kornilovich
  • FLUID EJECTION DEVICE
    Publication number: 20190134987
    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: Application
    Filed: July 29, 2016
    Publication date: May 9, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Nicholas McGuinness, Alexander Govyadinov, Tsuyoshi Yamashita, Erik D Torniainen, David P Markel
  • MICROFLUIDIC DEVICES
    Publication number: 20190128248
    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: Application
    Filed: July 22, 2016
    Publication date: May 2, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Alexander Govyadinov
  • Microfluidic systems and networks
    Patent number: 10272691
    Abstract: A network of microfluidic channels may include at least three loops interconnected at a junction. Each of the loops may include a fluid channel having a length extending from the junction to a second end; and a fluid actuator along the fluid channel and located at a first distance from junction along the length of the fluid channel and at a second distance less than the first distance from the second end. Activation of the fluid actuator of selected ones of the at least three loops may selectively produce net fluid flow in different directions about the loops. In one implementation, a fluid channel having a fluid actuator may have a bridging portion that extends over another fluid channel.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: April 30, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Alexander Govyadinov, David P. Markel, Erik D. Torniainen
  • FLUID EJECTION DEVICE
    Publication number: 20190111699
    Abstract: A fluid ejection device may include a series of spaced two-sided walls forming three channels therebetween. Each of the three channels may contain a drop ejector. The device may further include a fluid circulating element to circulate fluid across the drop ejector within each of the channels.
    Type: Application
    Filed: December 12, 2018
    Publication date: April 18, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Tommy D. Deskins
  • FLUID EJECTION DEVICE INCLUDING RECIRCULATION SYSTEM
    Publication number: 20190111698
    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: Application
    Filed: December 11, 2018
    Publication date: April 18, 2019
    Inventors: Alexander Govyadinov, Eric D. Torniainen, David P. Markel