Patents by Inventor Brian J. Keefe
Brian J. Keefe 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).
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Publication number: 20230303996Abstract: In one example in accordance with the present disclosure, a fluid manipulation system is described. The fluid manipulation system includes a microfluidic channel through which fluid is to flow. The fluid includes biomolecules to be separated. The fluid manipulation system also includes at least one array of biomolecule-capturing pillars disposed within the microfluidic channel to capture biomolecules from the fluid. Barriers rise from a surface of the microfluidic channel. The barriers span a width of the microfluidic channel orthogonal to a flow of the fluid to induce vortices in the fluid flow.Type: ApplicationFiled: August 28, 2020Publication date: September 28, 2023Applicant: Hewlett-Packard Development Company, L.P.Inventors: Jacob Shane Sasser, Alexander Govyadinov, Brian J. Keefe, David S. Clague, Natalie Taylor Weisenburger, Nicolas Robert Medjo
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Publication number: 20220065815Abstract: In one example in accordance with the present disclosure, a fluid analysis device is described. The fluid analysis device includes a chamber to receive a number of fluids. At least one fluid includes an electrochemical label with a unique electrochemical response to an applied electrical potential. A multi-electrode sensor of the fluid analysis device is disposed within the chamber and detects electrical signals within the chamber. The fluid analysis device also includes a controller coupled to the multi-electrode sensor. The controller applies an electrical potential across multiple electrodes of the multi-electrode sensor and identifies, from the electrical signal detected by the multi-electrode sensor, fluids currently in the chamber based on the unique electrochemical responses of associated electrochemical labels.Type: ApplicationFiled: May 7, 2019Publication date: March 3, 2022Applicant: Hewlett-Packard Development Company, L.P.Inventors: Tod Woodford, Alexander Govyadinov, Brian J. Keefe, Diane R. Hammerstad
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Publication number: 20220062901Abstract: In one example in accordance with the present disclosure, a fluid manipulation system is described. The fluid manipulation system includes a microfluidic channel through which fluid is to flow. The fluid includes particles to be separated. The fluid manipulation system includes a first electrode pair on a first side of the microfluidic channel. The first electrode pair includes a top electrode formed on a lid of the microfluidic channel and a bottom electrode formed on a floor of the microfluidic channel. The fluid manipulation system also includes a second electrode pair on a second side of the microfluidic channel. The second electrode pair also includes a top electrode and a bottom electrode. The electrode pairs are to generate an alternating electrical field across the microfluidic channel.Type: ApplicationFiled: August 27, 2021Publication date: March 3, 2022Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian J. Keefe, Alexander Govyadinov, Jae Elliot De Leon, Braden Thomas Andrews, David S. Clague
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Patent number: 11186099Abstract: Herein is disclosed a method of transfer inkjet printing comprising jetting a radiation curable inkjet ink onto an intermediate transfer member of an inkjet printer to form an image; irradiating the radiation curable inkjet ink on the intermediate transfer member to form an at least partially cured image; and transferring the at least partially cured image to a substrate to form a printed substrate. Herein is also disclosed a transfer inkjet printing apparatus adapted, in use, to perform the method.Type: GrantFiled: September 25, 2017Date of Patent: November 30, 2021Assignee: Hewlett-Packard Development Company, L.P.Inventors: Zhang-Lin Zhou, Rodney David Stramel, Gregg A. Lane, Shao-Wei Li, Brian J. Keefe
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Publication number: 20210322991Abstract: A rapid thermal cycling device can include a static microfluidic reaction chamber that can be defined between a layered substrate and a cover that can have an average space therebetween from 4 ?m to 150 ?m. The layered substrate can include a heating element thermally coupled to the static microfluidic reaction chamber to heat a fluid when present therein. The layered substrate, the cover, or both can include a heat diffusing material thermally coupled to the static microfluidic reaction chamber to diffuse heat out from the fluid while remaining in the static microfluidic reaction chamber.Type: ApplicationFiled: December 13, 2018Publication date: October 21, 2021Applicant: Hewlett-Packard Development Company, L.P.Inventors: Diane HAMMERSTAD, Alexander GOVYADINOV, Brian J. KEEFE, Erik D. TORNIAINEN, Tyler COCHELL, Pavel KORNILOVICH
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Publication number: 20200164661Abstract: Herein is disclosed a method of transfer inkjet printing comprising jetting a radiation curable inkjet ink onto an intermediate transfer member of an inkjet printer to form an image; irradiating the radiation curable inkjet ink on the intermediate transfer member to form an at least partially cured image; and transferring the at least partially cured image to a substrate to form a printed substrate. Herein is also disclosed a transfer inkjet printing apparatus adapted, in use, to perform the method.Type: ApplicationFiled: September 25, 2017Publication date: May 28, 2020Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Zhang-Lin Zhou, Rodney David Stramel, Gregg A. Lane, Shao-Wei Li, Brian J. Keefe
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Patent number: 10654275Abstract: A fluid injection module may include a fluid ejection die, a die carrier, a bypass fluid passage in at least one pressure regulator. The fluid ejection die may include nozzle orifices on a front face of the die, first and second fluid passages extending through the die and a microchannel extending from the first fluid passage to the second fluid passage proximate the nozzle orifices to circulate fluid from the first fluid passage to the second fluid passage. Third and fourth fluid passages may extend through the die carrier. The bypass fluid passage may extend from the third fluid passage to the fourth fluid passage while being connected to the first fluid passage and the second fluid passage. The at least one pressure regulator is to induce pressure differential driven fluid flow across the microchannel and across the bypass fluid passage.Type: GrantFiled: December 12, 2018Date of Patent: May 19, 2020Assignee: Hewlett-Packard Development Company, L.P.Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Publication number: 20200140711Abstract: Herein is disclosed a method of transfer inkjet printing comprising applying a radiation curable primer onto an intermediate transfer member of an inkjet printer to form a radiation curable primer layer; jetting a radiation curable inkjet ink onto the radiation curable primer layer on the intermediate transfer member to form an image; irradiating the radiation curable inkjet ink and the radiation curable primer on the intermediate transfer member to form an at least partially cured image; and transferring the at least partially cured image to a substrate to form a printed substrate. Herein is also disclosed a transfer inkjet printer adapted, in use, to perform the method.Type: ApplicationFiled: September 25, 2017Publication date: May 7, 2020Inventors: Zhang-Lin ZHOU, STRAMEL David Rodney, Gregg A. LANE, Yubai Bl, Brian J. KEEFE
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Patent number: 10507662Abstract: A print module may include a printhead die. The printhead die may include a chamber layer having ink chambers and micro-channels formed in the chamber layer. The print module may further include a die carrier including manifold passages through which ink flows to and from the printhead die and dual pressure regulators to flow fluid through the micro-channels of the printhead die.Type: GrantFiled: September 9, 2018Date of Patent: December 17, 2019Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Publication number: 20190111687Abstract: A fluid injection module may include a fluid ejection die, a die carrier, a bypass fluid passage in at least one pressure regulator. The fluid ejection die may include nozzle orifices on a front face of the die, first and second fluid passages extending through the die and a microchannel extending from the first fluid passage to the second fluid passage proximate the nozzle orifices to circulate fluid from the first fluid passage to the second fluid passage. Third and fourth fluid passages may extend through the die carrier. The bypass fluid passage may extend from the third fluid passage to the fourth fluid passage while being connected to the first fluid passage and the second fluid passage. The at least one pressure regulator is to induce pressure differential driven fluid flow across the microchannel and across the bypass fluid passage.Type: ApplicationFiled: December 12, 2018Publication date: April 18, 2019Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Patent number: 10179455Abstract: A print module includes a printhead die, an input regulator to regulate input fluid pressure to the die, and an output regulator to regulate output fluid pressure from the die. A method includes receiving fluid at an input regulator to a print module, creating a fluid pressure differential within the print module between the input regulator and an output regulator, flowing fluid from the input regulator through a printhead die and to an output regulator using the pressure differential, and drawing fluid from the output regulator.Type: GrantFiled: July 18, 2017Date of Patent: January 15, 2019Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Publication number: 20190001686Abstract: A print module may include a printhead die. The printhead die may include a chamber layer having ink chambers and micro-channels formed in the chamber layer. The print module may further include a die carrier including manifold passages through which ink flows to and from the printhead die and dual pressure regulators to flow fluid through the micro-channels of the printhead die.Type: ApplicationFiled: September 9, 2018Publication date: January 3, 2019Applicant: HEWLETI-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Patent number: 9931847Abstract: A printer is disclosed herein. The printer has a printhead having a plurality of ink nozzles for ejecting ink, a servicing mechanism for capturing the ejected ink from the ink nozzles, to service the printhead, and a control device coupled to the printhead and the servicing mechanism for regulating the servicing. As part of the regulation, the control device continues feeding a substrate towards the printhead during an idle period. The idle period of the printhead can be a duration when printing on the substrate is suspended. Further, the control device regulates ejection of ink from the ink nozzles towards the substrate during the idle period and operates the servicing mechanism during the idle period. In an example, the servicing mechanism captures the ink before the ink reaches the substrate.Type: GrantFiled: July 31, 2014Date of Patent: April 3, 2018Assignee: Hewlett-Packard Development Company, L.P.Inventors: Jeffrey Allen Wagner, Thomas M Sabo, Ronald A Askeland, Gonzalo Gaston Llado, Alyssa Michelle Siegman, Lawrence H White, Alex Andrea Tallada, Brian J Keefe, Maria Magdalena Martinez Ferrandiz, Daniel Vincent Keane, Yi Hong Tor, Marian Dinares Argemi, Francisco Lopez Moral, Xavier Bruch, Chandrasekhar Nadimpalli
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Publication number: 20170313088Abstract: A print module includes a printhead die, an input regulator to regulate input fluid pressure to the die, and an output regulator to regulate output fluid pressure from the die. A method includes receiving fluid at an input regulator to a print module, creating a fluid pressure differential within the print module between the input regulator and an output regulator, flowing fluid from the input regulator through a printhead die and to an output regulator using the pressure differential, and drawing fluid from the output regulator.Type: ApplicationFiled: July 18, 2017Publication date: November 2, 2017Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Patent number: 9724926Abstract: A print module includes a printhead die, an input regulator to regulate input fluid pressure to the die, and an output regulator to regulate output fluid pressure from the die. A method includes receiving fluid at an input regulator to a print module, creating a fluid pressure differential within the print module between the input regulator and an output regulator, flowing fluid from the input regulator through a printhead die and to an output regulator using the pressure differential, and drawing fluid from the output regulator.Type: GrantFiled: October 19, 2010Date of Patent: August 8, 2017Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Publication number: 20170217189Abstract: A printer is disclosed herein. The printer has a printhead having a plurality of ink nozzles for ejecting ink, a servicing mechanism for capturing the ejected ink from the ink nozzles, to service the printhead, and a control device coupled to the printhead and the servicing mechanism for regulating the servicing. As part of the regulation, the control device continues feeding a substrate towards the printhead during an idle period. The idle period of the printhead can be a duration when printing on the substrate is suspended. Further, the control device regulates ejection of ink from the ink nozzles towards the substrate during the idle period and operates the servicing mechanism during the idle period. In an example, the servicing mechanism captures the ink before the ink reaches the substrate.Type: ApplicationFiled: July 31, 2014Publication date: August 3, 2017Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Jeffrey Allen Wagner, Thomas M Sabo, Ronald A Askeland, Gonzalo Gaston Llado, Alyssa Michelle Siegman, Lawrence H White, Alex Andrea Tallada, Brian J Keefe, Maria Magdalena Martinez Ferrandiz, Daniel Vincent Keane, Yi Hong Tor, Marian Dinares Argemi, Francisco Lopez Moral, Xavier Bruch, Chandrasekhar Nadimpalli
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Publication number: 20130169710Abstract: A print module includes a printhead die, an input regulator to regulate input fluid pressure to the die, and an output regulator to regulate output fluid pressure from the die. A method includes receiving fluid at an input regulator to a print module, creating a fluid pressure differential within the print module between the input regulator and an output regulator, flowing fluid from the input regulator through a printhead die and to an output regulator using the pressure differential, and drawing fluid from the output regulator.Type: ApplicationFiled: October 19, 2010Publication date: July 4, 2013Inventors: Brian J. Keefe, Joseph E. Scheffelin, James W. Ring, Mark A. Devries
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Patent number: 7048359Abstract: An ink-jet printhead is provided having a thin film substrate comprising a plurality of thin film layers; a plurality of ink firing heater resistors defined in said plurality of thin film layers; a polymer fluid barrier layer; and a carbon rich layer disposed on said plurality of thin film layers, for bonding said polymer fluid barrier layer to said thin film substrate.Type: GrantFiled: June 11, 2003Date of Patent: May 23, 2006Assignee: Hewlett-Packard Development Company, L.P.Inventors: Brian J. Keefe, Ali Emamjomeh, Roger J. Kolodziej, Michael J. Regan, Harold Lee Van Nice
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Patent number: 6997540Abstract: A fluid ejection assembly includes a substrate and a plurality of fluid ejection devices each mounted on the substrate. The substrate includes a frame formed of a first material and a body formed of a second material such that the body substantially surrounds the frame and forms a first side and a second side of the substrate with each of the fluid ejection devices being mounted on the first side of the substrate.Type: GrantFiled: October 8, 2003Date of Patent: February 14, 2006Assignee: Hewlett-Packard Development Company, L.P.Inventors: Janis Horvath, Brian J. Keefe, Joseph E. Scheffelin, Mohammad Akhavin, David K. McElfresh, Noah Carl Lassar
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Patent number: 6880246Abstract: A method of forming a fluid ejection assembly includes providing a substrate including a plurality of layers and having a plurality of fluid passages extending through the plurality of layers, extending a support between opposite sides of each of the fluid passages, and mounting a plurality of fluid ejection devices on the substrate, including communicating each of the fluid ejection devices with one of the fluid passages.Type: GrantFiled: November 12, 2002Date of Patent: April 19, 2005Assignee: Hewlett-Packard Development Company, L.PInventors: Janis Horvath, Mohammad Akhavin, Joseph E. Scheffelin, Brian J. Keefe, David McElfresh, Pere Esterri