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).

  • FLUID EJECTION DEVICE
    Publication number: 20180215148
    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: October 27, 2015
    Publication date: August 2, 2018
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Tsuyoshi Yamashita, Erik D. Torniainen, Nicholas McGuinness, David P. Markel
  • POLYMERASE CHAIN REACTION DEVICE
    Publication number: 20180214866
    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: Application
    Filed: January 8, 2016
    Publication date: August 2, 2018
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Erik D Torniainen, Alexander Govyadinov, Pavel Kornilovich, David P Markel
  • SLOT-TO-SLOT CIRCULATION IN A FLUID EJECTION DEVICE
    Publication number: 20180201024
    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: Application
    Filed: March 14, 2018
    Publication date: July 19, 2018
    Inventors: Alexander Govyadinov, Craig Olbrich, Brian M. Taff
  • Microfluidic mixing device
    Patent number: 9981265
    Abstract: A microfluidic mixing device comprises a main channel and a number of secondary channels extending from a portion of the main channel and entering another portion of the main channel. A number of actuators are located in the secondary channels to pump fluids through the secondary channels. A microfluidic mixing system comprises a microfluidic mixing device. The microfluidic mixing device comprises a main fluid mixing channel, a number of main channel actuators to pump fluid through the main fluid mixing channel, a number of secondary channels fluidly coupled to the main fluid mixing channel, and a number of secondary channel actuators to pump fluids through the secondary channels. The microfluidic mixing device also comprises a fluid source, and a control device to provide fluids from the fluid source to the microfluidic mixing device and activate the main channel actuators and secondary channel actuators.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: May 29, 2018
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Pavel Kornilovich, Erik D. Torniainen, David P. Markel
  • Slot-to-slot circulation in a fluid ejection device
    Patent number: 9969177
    Abstract: In an embodiment, a fluid ejection device includes a die substrate having first and second fluid slots along opposite substrate sides and separated by a substrate central region. First and second internal columns of closed chambers are associated with the first and second slots, respectively, and the internal columns are separated by the central region. Fluidic channels extending across the central region fluidically couple closed chambers from the first internal column with closed chambers from the second internal column. Pump actuators in each closed chamber pump fluid through the channels from slot to slot.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: May 15, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Craig Olbrich, Brian M. Taff
  • Polymerase chain reaction systems
    Patent number: 9963739
    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: March 23, 2011
    Date of Patent: May 8, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Pavel Kornilovich, Eric D. Torniainen, Alexander Govyadinov, David P. Markel
  • Optical Spectrometer
    Publication number: 20180045562
    Abstract: Provided in one example is an apparatus, including a microfluidic channel supported by a substrate. An optical spectrometer includes a waveguide supported by the substrate. The waveguide includes a coupler and outcouplers. A light source directs light to the coupler of the waveguide. Optical sensors are supported by the substrate. Each of the optical sensors is optically coupled to one of the outcouplers.
    Type: Application
    Filed: April 30, 2015
    Publication date: February 15, 2018
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Charles M. Santori, Alexander Govyadinov
  • TARGET CONSTITUENT LOCATION AND DISCHARGE
    Publication number: 20180043362
    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: Application
    Filed: April 30, 2015
    Publication date: February 15, 2018
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Anita Rogacs, Alexander Govyadinov
  • Microfluidic Optical Fluid Sensor
    Publication number: 20180043687
    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: Application
    Filed: April 30, 2015
    Publication date: February 15, 2018
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Charles M. Santori, Anita Rogacs, Diane R. Hammerstad, Manish Giri
  • MICROFLUIDIC TRANSPORT
    Publication number: 20180029032
    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: Application
    Filed: January 30, 2015
    Publication date: February 1, 2018
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Erik D Torniainen, Pavel Kornilovich
  • FLUID EJECTION DEVICE
    Publication number: 20180022106
    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: April 30, 2015
    Publication date: January 25, 2018
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Tsuyoshi Yamashita, Erik D Torniainen
  • MICROFLUIDIC FLOW SENSOR
    Publication number: 20180023987
    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: Application
    Filed: April 30, 2015
    Publication date: January 25, 2018
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Erik D Torniainen, Pavel Kornilovich
  • DROP EJECTION BASED FLOW SENSOR CALIBRATION
    Publication number: 20180023995
    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: Application
    Filed: April 30, 2015
    Publication date: January 25, 2018
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Erik D Torniainen, Pavel Kornilovich, David P Markel
  • LIGHTING FOR ADDITIVE MANUFACTURING
    Publication number: 20170361505
    Abstract: In one example, a lighting device for an additive manufacturing machine includes an array of light sources each to emit monochromatic light within a band of wavelengths that includes a peak light absorption of a liquid coalescing agent to be dispensed on to a build material.
    Type: Application
    Filed: September 26, 2014
    Publication date: December 21, 2017
    Inventors: James Elmer Abbott, JR., Alexander Govyadinov, Vladek Kasperchik, Krzysztof Nauka, Sivapackia Ganapathiappan, Lihua Zhao, Howard S. Tom, JR., Yan Zhao, Hou T. Ng
  • FLUID EJECTION DEVICE
    Publication number: 20170313063
    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: Application
    Filed: October 31, 2014
    Publication date: November 2, 2017
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Paula A Richards, Chris Bakker
  • PRINT HEAD SENSING CHAMBER CIRCULATION
    Publication number: 20170313093
    Abstract: A print head has an ink 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 recirculation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the recirculation passage.
    Type: Application
    Filed: October 30, 2014
    Publication date: November 2, 2017
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Adam L Ghozeil, Boon Bing Ng, Patrick Leonard, Raymond Connolly
  • LIGHTING FOR ADDITIVE MANUFACTURING
    Publication number: 20170305066
    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: September 26, 2014
    Publication date: October 26, 2017
    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
    Publication number: 20170305169
    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 fluid circulation channel communicated with the fluid slot and one or more of the fluid ejection chambers, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide continuous circulation of fluid from the fluid slot through the fluid circulation channel and the one or more of the fluid ejection chambers.
    Type: Application
    Filed: October 31, 2014
    Publication date: October 26, 2017
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Alexander Govyadinov, Tommy D Deskins
  • Systems and methods for degassing fluid
    Patent number: 9776422
    Abstract: Systems and methods for degassing fluid are disclosed. An example fluid ejection device including a channel having an entrance and an exit; a supply slot in communication with the channel; a vent; a first bubble impeding structure at the entrance of the channel; and a second bubble impeding structure at an exit of the channel, the first and second bubble impeding structures to retain a bubble within the channel to enable the bubble to be vented through a vent and to deter the bubble from entering the ink supply slot.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 3, 2017
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: Alexander Govyadinov
  • MICROFLUIDIC VALVE
    Publication number: 20170276259
    Abstract: In an example implementation, a method of controlling a microfluidic valve includes activating a first inertial pump at a first frequency, and a second inertial pump at a second frequency to create a first fluid flow pattern within a microfluidic valve. The method also includes adjusting at least one of the first frequency and the second frequency to change the first fluid flow pattern to a second fluid flow pattern.
    Type: Application
    Filed: August 15, 2014
    Publication date: September 28, 2017
    Inventors: Alexander Govyadinov, Erik D Torniainen, David P Markel, Pavel Kornilovich