Patents by Inventor Brian C. Hart
Brian C. Hart 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: 20240109888Abstract: Compounds having formula (I), and enantiomers, and diastereomers, stereoisomers, pharmaceutically-acceptable salts thereof, are useful as kinase modulators, including RIPK1 modulation. All the variables are as defined herein.Type: ApplicationFiled: July 6, 2023Publication date: April 4, 2024Inventors: Guanglin Luo, Jie Chen, Carolyn Diane Dzierba, David B. Frennesson, Junqing Guo, Amy C. Hart, Xirui Hu, Michael E. Mertzman, Matthew Reiser Patton, Jianliang Shi, Steven H. Spergel, Brian Lee Venables, Yong-Jin Wu, Zili Xiao, Michael G. Yang
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Patent number: 7954927Abstract: An improved photoimaged nozzle plate for a micro-fluid ejection head, a micro-fluid ejection head containing the nozzle plate, and methods for making a micro-fluid ejection head. The improved nozzle plate is provided by a photoresist nozzle plate layer applied to a thick film layer on a semiconductor substrate containing fluid ejector actuators. The photoresist nozzle plate layer has a plurality of nozzle holes therein. Each of the nozzle holes are formed in the nozzle plate layer from an exit surface of the nozzle plate layer to an entrance surface of the nozzle plate layer. Each of the nozzle holes has a reentrant hole profile with a wall angle greater than about 4° up to about 30° measured from an axis orthogonal to a plane defined by the exit surface of the nozzle plate layer.Type: GrantFiled: February 1, 2008Date of Patent: June 7, 2011Assignee: Lexmark International, Inc.Inventors: Brian C. Hart, Gary A. Holt, Jr., Melissa M. Waldeck, Sean T. Weaver, Gary R. Williams
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Patent number: 7938975Abstract: A method of etching a semiconductor substrate. The method includes the steps of applying a photoresist etch mask layer to a device surface of the substrate. A select first area of the photoresist etch mask is masked, imaged and developed. A select second area of the photoresist etch mask layer is irradiated to assist in post etch stripping of the etch mask layer from the select second area. The substrate is etched to form fluid supply slots through a thickness of the substrate. At least the select second area of the etch mask layer is removed from the substrate, whereby mask layer residue formed from the select second area of the etch mask layer is significantly reduced.Type: GrantFiled: July 19, 2007Date of Patent: May 10, 2011Assignee: Lexmark International, Inc.Inventors: John W. Krawczyk, James M. Mrvos, Girish S. Patil, Jason T. Vanderpool, Brian C. Hart, Christopher J. Money, Jeanne M. Saldanha Singh, Karthik Vaideeswaran
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Patent number: 7905569Abstract: A substantially inorganic planarization layer for a micro-fluid ejection head substrate and method therefor. The planarization layer includes a plurality of layers composed of one or more dielectric compounds and at least one spin on glass (SOG) layer having a total thickness ranging from about 1 microns to about 15 microns deposited over a second metal layer of the micro-fluid ejection head substrate. A top most layer of the planarization layer is selected from one or more of the dielectric compounds and a hard mask material.Type: GrantFiled: September 15, 2004Date of Patent: March 15, 2011Assignee: Lexmark International, Inc.Inventors: Byron V. Bell, Craig M. Bertelsen, Brian C. Hart, Girish S. Patil, Sean T. Weaver
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Patent number: 7600858Abstract: A method of making a micro-fluid ejection head structure for a micro-fluid ejection device. The method includes applying a removable mandrel material to a semiconductor substrate wafer containing fluid ejection actuators on a device surface thereof. The mandrel material is shaped to provide fluid chamber and fluid channel locations on the substrate wafer. A micro machinable material is applied to the shaped mandrel and the device surface of the wafer to provide a nozzle plate and flow feature layer on the shaped mandrel and wafer. A plurality of nozzle holes are formed in the nozzle plate and flow feature layer. The shaped mandrel material is then removed from the device surface of the substrate wafer to provide fluid chambers and fluid channels in the nozzle plate and flow feature layer.Type: GrantFiled: May 29, 2007Date of Patent: October 13, 2009Assignee: Lexmark International, Inc.Inventors: Johnathan L. Barnes, Craig M. Bertelsen, Brian C. Hart, Gary R. Williams, Sean T. Weaver, Girish S. Patil
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Patent number: 7470505Abstract: Methods of making micro-fluid ejection head structures. One of the methods includes providing a substrate having a plurality fluid ejection actuators on a device surface thereof. The device surface of the substrate also has a thick film layer comprising at least one of fluid flow channels and fluid ejection chambers therein. A removable anti-reflective material is applied to at least one or more exposed portions of the device surface of the substrate. A nozzle layer is applied adjacent to the thick film layer. The nozzle layer is imaged to provide a plurality of nozzles in the nozzle layer, and the non-reflective material is removed from the exposed portions of the device surface of the substrate.Type: GrantFiled: September 23, 2005Date of Patent: December 30, 2008Assignee: Lexmark International, Inc.Inventors: Craig M. Bertelsen, Brian C. Hart, Melissa M. Waldeck, Sean T. Weaver
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Publication number: 20080122895Abstract: An improved photoimaged nozzle plate for a micro-fluid ejection head, a micro-fluid ejection head containing the nozzle plate, and methods for making a micro-fluid ejection head. The improved nozzle plate is provided by a photoresist nozzle plate layer applied to a thick film layer on a semiconductor substrate containing fluid ejector actuators. The photoresist nozzle plate layer has a plurality of nozzle holes therein. Each of the nozzle holes are formed in the nozzle plate layer from an exit surface of the nozzle plate layer to an entrance surface of the nozzle plate layer. Each of the nozzle holes has a reentrant hole profile with a wall angle greater than about 4° up to about 30° measured from an axis orthogonal to a plane defined by the exit surface of the nozzle plate layer.Type: ApplicationFiled: February 1, 2008Publication date: May 29, 2008Inventors: Brian C. Hart, Gary A. Holt, Melissa M. Waldeck, Sean T. Weaver, Gary R. Williams
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Patent number: 7364268Abstract: An improved photoimaged nozzle plate for a micro-fluid ejection head, a micro-fluid ejection head containing the nozzle plate, and methods for making a micro-fluid ejection head. The improved nozzle plate is provided by a photoresist nozzle plate layer applied to a thick film layer on a semiconductor substrate containing fluid ejector actuators. The photoresist nozzle plate layer has a plurality of nozzle holes therein. Each of the nozzle holes are formed in the nozzle plate layer from an exit surface of the nozzle plate layer to an entrance surface of the nozzle plate layer. Each of the nozzle holes has a reentrant hole profile with a wall angle greater than about 4° up to about 30° measured from an axis orthogonal to a plane defined by the exit surface of the nozzle plate layer.Type: GrantFiled: September 30, 2005Date of Patent: April 29, 2008Assignee: Lexmark International, Inc.Inventors: Brian C. Hart, Gary A. Holt, Jr., Melissa M. Waldeck, Sean T. Weaver, Gary R. Williams
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Patent number: 7271105Abstract: A method of etching a semiconductor substrate. The method includes the steps of applying a photoresist etch mask layer to a device surface of the substrate. A select first area of the photoresist etch mask is masked, imaged and developed. A select second area of the photoresist etch mask layer is irradiated to assist in post etch stripping of the etch mask layer from the select second area. The substrate is etched to form fluid supply slots through a thickness of the substrate. At least the select second area of the etch mask layer is removed from the substrate, whereby mask layer residue formed from the select second area of the etch mask layer is significantly reduced.Type: GrantFiled: September 15, 2004Date of Patent: September 18, 2007Assignee: Lexmark International, Inc.Inventors: John W. Krawczyk, James M. Mrvos, Girish S. Patil, Jason T. Vanderpool, Brian C. Hart, Christopher J. Money, Jeanne M. Saldanha Singh, Karthik Vaideeswaran
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Patent number: 7254890Abstract: A method of making a micro-fluid ejection head structure for a micro-fluid ejection device. The method includes applying a removable mandrel material to a semiconductor substrate wafer containing fluid ejection actuators on a device surface thereof. The mandrel material is shaped to provide fluid chamber and fluid channel locations on the substrate wafer. A micro machinable material is applied to the shaped mandrel and the device surface of the wafer to provide a nozzle plate and flow feature layer on the shaped mandrel and wafer. A plurality of nozzle holes are formed in the nozzle plate and flow feature layer. The shaped mandrel material is then removed from the device surface of the substrate wafer to provide fluid chambers and fluid channels in the nozzle plate and flow feature layer.Type: GrantFiled: December 30, 2004Date of Patent: August 14, 2007Assignee: Lexmark International, Inc.Inventors: Johnathan L. Barnes, Craig M. Bertelsen, Brian C. Hart, Gary R. Williams, Sean T. Weaver, Girish S. Patil
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Patent number: 7198353Abstract: An improved ink jet printhead and method therefor. The printhead includes a single semiconductor substrate with ink ejection devices and a nozzle plate adjacent to the semiconductor substrate, the nozzle plate with first ink ejection nozzles for ejecting first ink drops having a first volume and second ink ejection nozzles for ejecting second ink drops having a second volume different from the first volume, wherein the first volume is defined by first flow features of the printhead having a first thickness and the second volume is defined by second flow features having a second thickness that is different from the first thickness.Type: GrantFiled: June 30, 2004Date of Patent: April 3, 2007Assignee: Lexmark International, Inc.Inventors: Brian C. Hart, Colin G. Maher, James H. Powers
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Patent number: 7169538Abstract: A device surface of a substrate is dry-sprayed with a polymeric material (e.g., a photoresist) to provide a spray-coated layer on the surface of the substrate. The spray-coated layer has a thickness ranging from about 0.5 to about 20 microns. Flow features are formed (e.g., imaged and developed) in the spray-coated layer. A nozzle plate layer is applied to the spray-coated layer. The nozzle plate layer has a thickness ranging from about 5 to about 40 microns and contains nozzle holes formed therein to provide the micro-fluid ejection head structure.Type: GrantFiled: September 10, 2004Date of Patent: January 30, 2007Assignee: Lexmark International, Inc.Inventors: Craig M. Bertelsen, Brian C. Hart, Gary A. Holt, Jr., Gary R. Williams, Sean T. Weaver
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Patent number: 6830646Abstract: A radiation curable resin formulation suitable for planarizing an ink jet heater chip. The resin formulation includes a multifunctional epoxy component, a difunctional epoxy component, a silane coupling agent, an aryl sulfonium salt photoinitiator, and a non-photoreactive solvent. The resin formulation is substantially devoid of acrylate polymer components. Radiation curable resins according to the invention exhibit enhanced adhesion with the nozzle plate adhesive thereby reducing the incidence of delamination between the nozzle plate and a semiconductor chip containing the resin layer. Another advantage is that the resin layer, according to the invention, reduces pigment flocculation on the surface of the resin layer when using pigment-based ink jet inks.Type: GrantFiled: April 18, 2003Date of Patent: December 14, 2004Assignee: Lexmark International, Inc.Inventors: Girish S. Patil, Brian C. Hart
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Patent number: 6783918Abstract: A radiation curable resin formulation suitable for planarizing an ink jet heater chip. The resin formulation includes a multifunctional epoxy component, a difunctional epoxy component, a silane coupling agent, an aryl sulfonium salt photoinitiator, and a non-photoreactive solvent. The resin formulation is substantially devoid of acrylate polymer components. Radiation curable resins according to the invention exhibit enhanced adhesion with the nozzle plate adhesive thereby reducing the incidence of delamination between the nozzle plate and a semiconductor chip containing the resin layer. Another advantage is that the resin layer, according to the invention, reduces pigment flocculation on the surface of the resin layer when using pigment-based ink jet inks.Type: GrantFiled: April 14, 2003Date of Patent: August 31, 2004Assignee: Lexmark International, Inc.Inventors: Girish S. Patil, Brian C. Hart
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Publication number: 20030207209Abstract: A radiation curable resin formulation suitable for planarizing an ink jet heater chip. The resin formulation includes a multifunctional epoxy component, a difunctional epoxy component, a silane coupling agent, an aryl sulfonium salt photoinitiator, and a non-photoreactive solvent. The resin formulation is substantially devoid of acrylate polymer components. Radiation curable resins according to the invention exhibit enhanced adhesion with the nozzle plate adhesive thereby reducing the incidence of delamination between the nozzle plate and a semiconductor chip containing the resin layer. Another advantage is that the resin layer, according to the invention, reduces pigment flocculation on the surface of the resin layer when using pigment-based ink jet inks.Type: ApplicationFiled: April 18, 2003Publication date: November 6, 2003Inventors: Girish S. Patil, Brian C. Hart
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Publication number: 20030170567Abstract: A radiation curable resin formulation suitable for planarizing an ink jet heater chip. The resin formulation includes a multifunctional epoxy component, a difunctional epoxy component, a silane coupling agent, an aryl sulfonium salt photoinitiator, and a non-photoreactive solvent. The resin formulation is substantially devoid of acrylate polymer components. Radiation curable resins according to the invention exhibit enhanced adhesion with the nozzle plate adhesive thereby reducing the incidence of delamination between the nozzle plate and a semiconductor chip containing the resin layer. Another advantage is that the resin layer, according to the invention, reduces pigment flocculation on the surface of the resin layer when using pigment-based ink jet inks.Type: ApplicationFiled: April 14, 2003Publication date: September 11, 2003Inventors: Girish S. Patil, Brian C. Hart