Patents by Inventor Daniel A. Kearl
Daniel A. Kearl 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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Patent number: 10300692Abstract: An inkjet printhead includes an inkjet nozzle with a main actuator and a peripheral actuator in a firing chamber. A determination is made as to whether the inkjet nozzle has sat idle, e.g., not firing for a threshold period of time. When the inkjet nozzle has sat idle, both the main actuator and the peripheral actuator are activated to jet at least one ink drop. When the inkjet nozzle has not sat idle, only the main actuator is activated to jet ink drops.Type: GrantFiled: October 25, 2017Date of Patent: May 28, 2019Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian M. Taff, Erik D. Torniainen, Daniel A. Kearl
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Publication number: 20180056649Abstract: An inkjet printhead includes an inkjet nozzle with a main actuator and a peripheral actuator in a firing chamber. A determination is made as to whether the inkjet nozzle has sat idle, e.g., not firing for a threshold period of time. When the inkjet nozzle has sat idle, both the main actuator and the peripheral actuator are activated to jet at least one ink drop. When the inkjet nozzle has not sat idle, only the main actuator is activated to jet ink drops.Type: ApplicationFiled: October 25, 2017Publication date: March 1, 2018Inventors: Brian M. Taff, Erik D. Torniainen, Daniel A. Kearl
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Patent number: 9844933Abstract: An inkjet printhead includes an inkjet nozzle with a main actuator and at least one peripheral actuator in the same firing chamber. A determination is made as to whether the inkjet nozzle has sat idle, e.g., not firing for a threshold period of time. When the inkjet nozzle has sat idle, both the main actuator and the peripheral actuator are activated to jet at least one ink drop to renew the inkjet nozzle to mitigate decap conditions. When the inkjet nozzle has not sat idle, only the main actuator is activated to jet ink drops.Type: GrantFiled: February 10, 2016Date of Patent: December 19, 2017Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Brian M. Taff, Erik D. Torniainen, Daniel A. Kearl
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Publication number: 20160167375Abstract: An inkjet printhead includes an inkjet nozzle with a main actuator and at least one peripheral actuator in the same firing chamber. A determination is made as to whether the inkjet nozzle has sat idle, e.g., not firing for a threshold period of time. When the inkjet nozzle has sat idle, both the main actuator and the peripheral actuator are activated to jet at least one ink drop to renew the inkjet nozzle to mitigate decap conditions. When the inkjet nozzle has not sat idle, only the main actuator is activated to jet ink drops.Type: ApplicationFiled: February 10, 2016Publication date: June 16, 2016Inventors: Brian M. Taff, Erik D. Torniainen, Daniel A. Kearl
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Patent number: 9289982Abstract: An inkjet printhead includes an inkjet nozzle with a main actuator and at least one peripheral actuator in the same firing chamber. When the inkjet nozzle has sat idle, both the main actuator and the peripheral actuator are activated to jet at least one ink drop to renew the inkjet nozzle to mitigate decap conditions. When the inkjet nozzle has not sat idle, only the main actuator is activated to jet ink drops. The ink drops jetted by activating both the main and the peripheral actuators and the ink drops generated by activating only the main actuator have the same drop weight and drop velocity.Type: GrantFiled: April 28, 2012Date of Patent: March 22, 2016Assignee: Hewlett-Packard Development Company, L.P.Inventors: Brian M. Taff, Erik D. Torniainen, Daniel A. Kearl
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Publication number: 20150097884Abstract: An inkjet printhead includes an inkjet nozzle with a main actuator and at least one peripheral actuator in the same firing chamber. When the inkjet nozzle has sat idle, both the main actuator and the peripheral actuator are activated to jet at least one ink drop to renew the inkjet nozzle to mitigate decap conditions. When the inkjet nozzle has not sat idle, only the main actuator is activated to jet ink drops. The ink drops jetted by activating both the main and the peripheral actuators and the ink drops generated by activating only the main actuator have the same drop weight and drop velocity.Type: ApplicationFiled: April 28, 2012Publication date: April 9, 2015Inventors: Brian M. Taff, Erik D. Torniainen, Daniel A. Kearl
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Patent number: 8940559Abstract: In an embodiment, a method of fabricating an integrated orifice plate and cap structure includes forming an orifice bore on the front side of a product wafer, coating side walls of the orifice bore with a protective material, grinding the product wafer from its back side to a final thickness, forming a first hardmask for subsequent cavity formation, forming a second hardmask over the first hardmask for subsequent descender formation, forming a softmask over the second hardmask for subsequent convergent bore formation, etching a latent convergent bore using the softmask as an etch delineation feature, etching a descender using the second hardmask as an etch delineation feature, and anisotropic etching of convergent bore walls and cavities using the first hardmask as an etch delineation feature.Type: GrantFiled: November 4, 2011Date of Patent: January 27, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Daniel A Kearl, Rio Rivas
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Publication number: 20130115724Abstract: In an embodiment, a method of fabricating an integrated orifice plate and cap structure includes forming an orifice bore on the front side of a product wafer, coating side walls of the orifice bore with a protective material, grinding the product wafer from its back side to a final thickness, forming a first hardmask for subsequent cavity formation, forming a second hardmask over the first hardmask for subsequent descender formation, forming a softmask over the second hardmask for subsequent convergent bore formation, etching a latent convergent bore using the softmask as an etch delineation feature, etching a descender using the second hardmask as an etch delineation feature, and anisotropic etching of convergent bore walls and cavities using the first hardmask as an etch delineation feature.Type: ApplicationFiled: November 4, 2011Publication date: May 9, 2013Inventors: Daniel A. Kearl, Rio Rivas
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Patent number: 8330955Abstract: A color detector includes a light source, a photodiode, and a filter tuned to only allow light of a specific color to pass through to the photodiode. When the light reaches the photodiode, the photodiode outputs a current that indicates that the color is present in the light. The filter may include a pair of partially reflective layers consisting of a reflective metal, such as silver. To prevent the metal from oxidizing or reacting with the environment, the partially reflective layers may be coated with a protective layer, such as aluminum nitride. The color detector may further include a color enhancing layer. Finally, the color detector may include a capping layer. Accordingly, the color detector provided herein allows for the filter to use metals for partially reflective layers that would normally oxidize, as well as detect light of a specific spectrum of wavelengths.Type: GrantFiled: February 12, 2008Date of Patent: December 11, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Stephan R. Clark, Michael G. Monroe, Melinda M. Valencia, Daniel A. Kearl
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Patent number: 8263259Abstract: Bipolar plates and end plates for fuel cell stacks. The bipolar plates or end plates may include semi-conductive or conductive bodies, intricate features with close tolerances such as narrow flow channels and conduits with complex flow paths, integral resistive heating elements, internal catalytic reforming capability, integral heat exchanging structure, substantially flat and undistorted contact faces, integral sensors, and internal recuperative heat exchanging capacity. Methods of making bipolar plates and end plates for fuel cell stacks. The methods involve a range of integrated processing techniques that enable a flexible approach to bipolar and end plate design. In addition, the ability to reliably produce features on a small scale allows for the potential miniaturization of bipolar plates and end plates and is therefore ideally suited to further the development of small scale portable fuel cell systems.Type: GrantFiled: April 5, 2004Date of Patent: September 11, 2012Assignee: Eveready Battery Company, Inc.Inventor: Daniel A. Kearl
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Patent number: 8039158Abstract: A solid oxide fuel cell system includes at least one fuel cell and at least one gas flow channel to deliver a reactant mixture. The fuel cell comprises at least one chamber to house at least one anode, at least one cathode, and at least one electrolyte, and the fuel cell is adapted to receive a reactant mixture comprising reactants mixed prior to delivery to the fuel cell. The one or more gas flow channels for delivering the reactant mixture have characteristic dimensions that are less than a quench distance of the reactant mixture at an operating temperature within the solid oxide fuel cell system.Type: GrantFiled: June 27, 2005Date of Patent: October 18, 2011Assignee: Eveready Battery Company, Inc.Inventors: Daniel A. Kearl, Richard B. Peterson
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Patent number: 7981560Abstract: A MEMS-based fuel cell has a substrate, an electrolyte in contact with the substrate, a cathode in contact with the electrolyte, an anode spaced apart from the cathode and in contact with the electrolyte, and an integral manifold for supplying either a fuel or an oxidant or both together, the integral manifold extending over at least a portion of the electrolyte and over at least one of the anode and cathode. Methods for making and using arrays of the fuel cells are disclosed.Type: GrantFiled: December 20, 2007Date of Patent: July 19, 2011Assignee: Eveready Battery Company, Inc.Inventors: Daniel A Kearl, David Champion, Gregory S Herman, Richard B. Peterson
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Publication number: 20100328668Abstract: A color detector includes a light source, a photodiode, and a filter tuned to only allow light of a specific color to pass through to the photodiode. When the light reaches the photodiode, the photodiode outputs a current that indicates that the color is present in the light. The filter may include a pair of partially reflective layers consisting of a reflective metal, such as silver. To prevent the metal from oxidizing or reacting with the environment, the partially reflective layers may be coated with a protective layer, such as aluminum nitride. The color detector may further include a color enhancing layer. Finally, the color detector may include a capping layer. Accordingly, the color detector provided herein allows for the filter to use metals for partially reflective layers that would normally oxidize, as well as detect light of a specific spectrum of wavelengths.Type: ApplicationFiled: February 12, 2008Publication date: December 30, 2010Inventors: Stephan G. Clark, Michael G. Monroe, Melinda M. Valencia, Daniel A. Kearl
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Publication number: 20100279207Abstract: A MEMS-based fuel cell has a substrate, an electrolyte in contact with the substrate, a cathode in contact with the electrolyte, an anode spaced apart from the cathode and in contact with the electrolyte, and an integral manifold for supplying either a fuel or an oxidant or both together, the integral manifold extending over at least a portion of the electrolyte and over at least one of the anode and cathode. Methods for making and using arrays of the fuel cells are disclosed.Type: ApplicationFiled: December 20, 2007Publication date: November 4, 2010Inventors: Daniel A. Kearl, David Champion, Gregory S. Herman, Richard B. Peterson
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Patent number: 7732902Abstract: A semiconductor package includes a substrate having a first surface portion in a cavity. The first surface portion includes an artificially formed grass structure. The package includes a getter film formed over the grass structure.Type: GrantFiled: September 5, 2006Date of Patent: June 8, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: James C. McKinnell, Chien-Hua Chen, Kenneth Diest, Kenneth M. Kramer, Daniel A. Kearl
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Patent number: 7645537Abstract: A fuel cell layer includes a substrate, an array of fuel cells each having an anode, a cathode, and an electrolyte disposed on the substrate, conductors electrically coupled to the fuel cell array, a fuel flow channel defined in an anode side of the substrate; and a cathode air flow channel defined in a cathode side of the substrate.Type: GrantFiled: October 15, 2003Date of Patent: January 12, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Alan R. Arthur, Gary Tarver, Daniel A. Kearl
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Patent number: 7491457Abstract: A fuel cell apparatus including fuel cell blocks electrically re-configurable in at least two arrangements by a control module.Type: GrantFiled: August 16, 2002Date of Patent: February 17, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: Daniel A. Kearl, Ted W. Barnes, David Champion, Gregory Herman
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Patent number: 7425381Abstract: A high temperature seal including an aerogel gasket disposed between two or more components of a high temperature fuel cell system.Type: GrantFiled: January 13, 2003Date of Patent: September 16, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventors: John Gilman, Daniel A Kearl
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Patent number: 7348087Abstract: A MEMS-based fuel cell has a substrate, an electrolyte in contact with the substrate, a cathode in contact with the electrolyte, an anode spaced apart from the cathode and in contact with the electrolyte, and an integral manifold for supplying either a fuel or an oxidant or both together, the integral manifold extending over at least a portion of the electrolyte and over at least one of the anode and cathode. Methods for making and using arrays of the fuel cells are disclosed.Type: GrantFiled: July 28, 2003Date of Patent: March 25, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventors: Daniel A Kearl, David Champion, Gregory S Herman, Richard B. Peterson
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Publication number: 20070211257Abstract: A composite partially reflecting element of a Fabry-Perot interferometer includes a transparent plate having a surface facing toward the optical gap of the interferometer, a partially reflecting layer disposed on the surface of the transparent plate facing toward the optical gap, and at least one protective layer on at least one side of the partially reflecting layer.Type: ApplicationFiled: March 9, 2006Publication date: September 13, 2007Inventors: Daniel Kearl, Michael Monroe, Henry Lewis, Melinda Valencia, James McKinnell, James Przybyla, Arthur Piehl, Stephen Potochnik