公开(公告)号：US11938727B2

公开(公告)日：2024-03-26

申请号：US17795039

申请日：2020-02-14

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Alexander Govyadinov ,  Alex Trubnikov ,  Ronald Albert Askeland

IPC: B41J2/14

CPC classification number: B41J2/14032 ,  B41J2202/12

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.

公开(公告)号：US11794186B2

公开(公告)日：2023-10-24

申请号：US17384376

申请日：2021-07-23

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Pavel Kornilovich ,  Alexander Govyadinov ,  Anand Samuel Jebakumar

IPC: B01L3/00

CPC classification number: B01L3/502738 ,  B01L2200/0605 ,  B01L2300/18 ,  B01L2400/0622

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.

公开(公告)号：US11686664B2

公开(公告)日：2023-06-27

申请号：US16768878

申请日：2018-01-29

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Pavel Kornilovich

IPC: G01N15/14 ,  B01L3/00 ,  G01N15/10 ,  H10N30/20

CPC classification number: G01N15/1484 ,  B01L3/50273 ,  H10N30/2047 ,  G01N2015/1006 ,  G01N2015/1081

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.

公开(公告)号：US11666910B2

公开(公告)日：2023-06-06

申请号：US17268394

申请日：2018-11-26

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Daryl E. Anderson ,  George H. Corrigan, III ,  Alexander Govyadinov

IPC: B01L7/00 ,  C12Q1/686 ,  B01L3/00

CPC classification number: B01L3/50273 ,  B01L7/525 ,  C12Q1/686 ,  B01L2200/0673 ,  B01L2300/0645 ,  B01L2300/1827 ,  B01L2400/0442

Abstract: In one example in accordance with the present disclosure, a microfluidic device is described. The microfluidic device includes a reservoir to contain a first thermally expandable fluid, a first heater to heat the thermally expandable fluid in the reservoir, a channel extending from the reservoir and connected to the reservoir at a first opening, and a liquid volume obstructing the channel.

公开(公告)号：US11441960B2

公开(公告)日：2022-09-13

申请号：US16074349

申请日：2016-04-20

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Ning Ge ,  Alexander Govyadinov ,  Anita Rogacs ,  Viktor Shkolnikov

IPC: G01L9/00 ,  B81B1/00 ,  B81B7/02 ,  G01L7/18 ,  G01L19/00

Abstract: A microfluidic pressure sensor may include a reference chamber, a sensed volume, a microfluidic channel connecting an interior of the reference chamber to an interior of the sensed volume, a volume of liquid contained and movable within the microfluidic channel while occluding the microfluidic channel and a sensor to output signals indicating positioning of the volume of liquid along the microfluidic channel. Positioning of the volume of liquid along microfluidic channel indicates a pressure of the sensed volume.

公开(公告)号：US20220118450A1

公开(公告)日：2022-04-21

申请号：US17417500

申请日：2019-04-30

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Viktor Shkolnikov ,  Alexander Govyadinov

IPC: B01L3/00 ,  B01L7/00

Abstract: The present disclosure relates to a microfluidic device including a microfluidic substrate and dry reagent-containing particles. The microfluidic substrate includes an ingress microfluidic channel that fluidly feeds an egress microfluidic channel through a microfluidic-retaining region that includes a microfluidic discontinuity feature, a particle-retaining chemical coating, or a combination thereof. The dry reagent-containing particles include a reagent that is releasable from the dry reagent-containing particles when exposed to a release fluid. The dry reagent-containing particles are retained within the microfluidic substrate at the microfluidic discontinuity feature or particle-retaining chemical coating in position to release the reagent into the egress microfluidic channel upon flow of release fluid from the ingress microfluidic channel through the microfluidic-retaining region.

公开(公告)号：US11279137B2

公开(公告)日：2022-03-22

申请号：US16606761

申请日：2018-07-17

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Pavel Kornilovich ,  Diane R Hammerstad

IPC: B41J2/175 ,  B41J2/07 ,  B41J2/14

Abstract: An example device includes a first substrate including a first array of droplet ejectors to eject droplets of a first fluid. The example device further includes a first target medium immovably positioned relative to the first substrate to receive droplets of the first fluid from a first subset of droplet ejectors of the first array of droplet ejectors. A second subset of droplet ejectors of the first array of droplet ejectors is positioned to eject droplets of the first fluid to miss the first target medium.

公开(公告)号：US11278891B2

公开(公告)日：2022-03-22

申请号：US15763402

申请日：2015-09-25

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Erik D. Torniainen ,  Pavel Kornilovich ,  David P. Markel

IPC: B81B1/00 ,  B01L3/00

Abstract: Example fluidic channels for microfluidic devices are disclosed. In examples disclosed herein, an example microfluidic device includes a body having a microfluidic network. The microfluidic network includes a main fluid channel to transport a biological fluid from a first cavity of the microfluidic network to a second cavity of the microfluidic network. An auxiliary fluid channel is in fluid communication with to the main fluid channel. The auxiliary fluid channel has a first end and a second end. The first end is in fluid communication with the main fluid channel and the second end is spaced from the main fluid channel. A fluid actuator is positioned in the auxiliary fluid channel to induce fluid flow in the main fluid channel.

公开(公告)号：US20220073863A1

公开(公告)日：2022-03-10

申请号：US17417339

申请日：2019-02-01

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Viktor Shkolnikov ,  Alexander Govyadinov ,  Diane R. Hammerstad

IPC: C12M1/00 ,  C12M1/42 ,  C12M3/06

Abstract: In one example in accordance with the present disclosure, a chemical lysis system is described. The chemical lysis system includes a microfluidic channel to serially feed individual cells from a volume of cells to at least one chemical lysing device. Each chemical lysing device includes at least one lysing chamber to receive, from the microfluidic channel, a single cell to be lysed. The chemical lysing device also includes an orifice disposed in each lysing chamber to receive a lysing agent and a sensor to detect a state within the lysing chamber. A controller of the chemical lysis system analyzes a ruptured cell.

公开(公告)号：US11260668B2

公开(公告)日：2022-03-01

申请号：US17065831

申请日：2020-10-08

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Alexander Govyadinov ,  Erik D Torniainen ,  David P Markel

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/175 ,  F04B19/00 ,  F04B19/20 ,  F04B19/24 ,  B01L3/00

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.