Patents by Inventor Donald W. Schulte

Donald W. Schulte 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).

  • Patent number: 10421275
    Abstract: A fluid ejecting device including a die including a perimeter defined by a first edge, a second edge opposing the first edge, a third edge, and a fourth edge opposing the third edge, wherein the third and fourth edges are disposed at an angle to the first and second edges to form angular corners, an active area including circuitry for controlling the fluid ejecting device to eject fluid, an inactive area positioned between the perimeter and the active area, and a termination ring encircling the active area, the termination ring including sides extending parallel to the first, second, third, and fourth edges and corners coupling adjacent sides, the corners having a corner radius greater than a first distance between the first edge and one of the sides of the termination ring, and a nozzle to eject fluid.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: September 24, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Donald W Schulte, Terry McMahon, Tony Fuller, Stan E Leigh
  • Publication number: 20190248157
    Abstract: In some examples, a heater assembly for a pattern forming system includes a support, and heating elements mounted on the support, where the heating elements are to, in response to activation of the heating element, produce heat directed towards a target to form a pattern on the target. A heat sink is thermally connected to the heating elements and comprising a pattern of heat dissipation surfaces comprising channels to dissipate heat produced by the heating elements.
    Type: Application
    Filed: October 20, 2016
    Publication date: August 15, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Reynaldo V Villavelez, Terry McMahon, Donald W Schulte
  • Patent number: 10369788
    Abstract: A fluid ejection device may include a substrate having front and back opposing surfaces and a slot extending through the substrate between the back and front surfaces and along an axis of the substrate. A recessed end region may be formed in the back surface at each end of the slot.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 6, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Rio Rivas, Ed Friesen, Terry McMahon, Donald W. Schulte, David Douglas Hall
  • Publication number: 20190210362
    Abstract: A system for isolating a failed resistor in a liquid dispensing system including a fusible links described. The system includes drive circuitry to drive a voltage supply to a resistor. The fusible link is disposed between a field effect transistor (FET) and the resistor. The fusible link is to fuse apart upon failure of the resistor.
    Type: Application
    Filed: March 15, 2019
    Publication date: July 11, 2019
    Inventors: Stanley J. Wang, Terry McMahon, Mohammed S. Shaarawi, Donald W. Schulte
  • Publication number: 20190210366
    Abstract: A conductive wire disposed in a layer is described. An example apparatus includes a die including a silicon layer and a first layer coupled to the silicon layer. The example apparatus a conductive wire disposed in the first layer adjacent a perimeter of a location at which a fluid feed slot is to be formed in the silicon layer. The conductive wire has an electrical characteristic that corresponds to whether the fluid feed slot is defective.
    Type: Application
    Filed: August 3, 2016
    Publication date: July 11, 2019
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Anthony M Fuller, Terry McMahon, Donald W Schulte, Amy Gault
  • Patent number: 10272671
    Abstract: A system for isolating a failed resistor in a liquid dispensing system including a fusible links described. The system includes drive circuitry to drive a voltage supply to a resistor. The fusible link is disposed between a field effect transistor (FET) and the resistor. The fusible link is to fuse apart upon failure of the resistor.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: April 30, 2019
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Stanley J. Wang, Terry McMahon, Mohammed S. Shaarawi, Donald W. Schulte
  • Publication number: 20180222181
    Abstract: A system for isolating a failed resistor in a liquid dispensing system including a fusible links described. The system includes drive circuitry to drive a voltage supply to a resistor. The fusible link is disposed between a field effect transistor (FET) and the resistor. The fusible link is to fuse apart upon failure of the resistor.
    Type: Application
    Filed: October 8, 2015
    Publication date: August 9, 2018
    Inventors: Stanley J. Wang, Terry McMahon, Mohammed S. Shaarawi, Donald W. Schulte
  • Publication number: 20170313065
    Abstract: A fluid ejecting device including a die including a perimeter defined by a first edge, a second edge opposing the first edge, a third edge, and a fourth edge opposing the third edge, wherein the third and fourth edges are disposed at an angle to the first and second edges to form angular corners, an active area including circuitry for controlling the fluid ejecting device to eject fluid, an inactive area positioned between the perimeter and the active area, and a termination ring encircling the active area, the termination ring including sides extending parallel to the first, second, third, and fourth edges and corners coupling adjacent sides, the corners having a corner radius greater than a first distance between the first edge and one of the sides of the termination ring, and a nozzle to eject fluid.
    Type: Application
    Filed: October 30, 2014
    Publication date: November 2, 2017
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Donald W Schulte, Terry McMahon, Tony Fuller, Stan E Leigh
  • Patent number: 9707586
    Abstract: In an embodiment, a method of forming a printhead includes forming on a front-side surface of a substrate, a thin film layer and a plurality of fluidic channels and ejection chambers. The method also includes forming a slot through the substrate from the back-side surface to the front-side surface, where the back-side and front-side surfaces generally oppose one another. The slot has a length extending along a long axis of the substrate and a width extending along a short axis of the substrate. The method includes forming recessed regions into the back-side surface of the substrate at both ends of the slot that extend beyond the length of the slot.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: July 18, 2017
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Rio Rivas, Ed Friesen, Terry McMahon, Donald W. Schulte, David Douglas Hall
  • Publication number: 20170157925
    Abstract: A fluid ejection device may include a substrate having front and back opposing surfaces and a slot extending through the substrate between the back and front surfaces and along an axis of the substrate. A recessed end region may be formed in the back surface at each end of the slot.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 8, 2017
    Inventors: Rio Rivas, Ed Friesen, Terry McMahon, Donald W. Schulte, David Douglas Hall
  • Publication number: 20150001316
    Abstract: In an embodiment, a method of forming a printhead includes forming on a front-side surface of a substrate, a thin film layer and a plurality of fluidic channels and ejection chambers. The method also includes forming a slot through the substrate from the back-side surface to the front-side surface, where the back-side and front-side surfaces generally oppose one another. The slot has a length extending along a long axis of the substrate and a width extending along a short axis of the substrate. The method includes forming recessed regions into the back-side surface of the substrate at both ends of the slot that extend beyond the length of the slot.
    Type: Application
    Filed: March 16, 2012
    Publication date: January 1, 2015
    Inventors: Rio Rivas, Ed Friesen, Terry McMahon, Donald W. Schulte, David Douglas Hall
  • Patent number: 8770707
    Abstract: A drop detector assembly includes an ejection element formed on a substrate to eject a fluid drop, and a light detector formed on the substrate to detect light scattered off of the fluid drop. A fluid drop ejected from a nozzle formed in a transparent nozzle plate scatters light that is detected through the transparent nozzle plate.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: July 8, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexander Govyadinov, Andrew L. Van Brocklin, Donald W. Schulte, Terry McMahon
  • Publication number: 20130182031
    Abstract: A drop detector assembly includes an ejection element formed on a substrate to eject a fluid drop, and a light detector formed on the substrate to detect light scattered off of the fluid drop. A fluid drop ejected from a nozzle formed in a transparent nozzle plate scatters light that is detected through the transparent nozzle plate.
    Type: Application
    Filed: September 2, 2010
    Publication date: July 18, 2013
    Inventors: Alexander Govyadinov, Andrew L. Van Brocklin, Donald W. Schulte, Terry McMahon
  • Patent number: 8336981
    Abstract: A method of determining a healthy fluid ejection nozzle includes measuring changes in impedance across the nozzle as fluid passes through it. A printhead includes a metal probe that intersects an ink nozzle and an integrated circuit to sense a change in impedance across the nozzle through the metal probe.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: December 25, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Chien-Hua Chen, Donald W. Schulte, Terry Mcmahon, Ying-Chih Liao, David D. Hall
  • Publication number: 20110084997
    Abstract: A method of determining a healthy fluid ejection nozzle includes measuring changes in impedance across the nozzle as fluid passes through it. A printhead includes a metal probe that intersects an ink nozzle and an integrated circuit to sense a change in impedance across the nozzle through the metal probe.
    Type: Application
    Filed: October 8, 2009
    Publication date: April 14, 2011
    Inventors: Chien-Hua Chen, Donald W. Schulte, Terry McMahon, Ying-Chih Liao, David D. Hall
  • Patent number: 7924597
    Abstract: A method of storing data in an array of circuit elements, said method comprising injecting a current into selected circuit elements, said current causing a persistent change in a resistance of said selected circuit elements from a first resistance to a second higher resistance indicative of a binary data bit, wherein said current does not break an electrical circuit in which said circuit element is disposed.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 12, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald W. Schulte, David D. Hall, Terry Mcmahon
  • Patent number: 7798611
    Abstract: The present invention includes as one embodiment an ink jet printhead having a circuit with plural resistors and a power bus. The printhead includes a metal stack formed within the circuit, which is comprised of a first metal layer and a second metal layer and at least one power via. The power via is formed within the circuit as an interface between the first metal layer and the second metal layer and acts as a separation barrier between conductive portions of the resistors and the power bus.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: September 21, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: William B. Connors, Terry E McMahon, Donald W Schulte, Keith Moore
  • Patent number: 7758169
    Abstract: An electrical device includes an interconnect and a pair substrates at least one of which includes an integrated circuit, the pair of substrates being bonded together by a bond that includes a structure having multiple widths and a composition that is selected from the group consisting of a graded material and a first material upon a second material.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: July 20, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Timothy R. Emery, William J. Edwards, Donald W. Schulte
  • Patent number: 7679426
    Abstract: In one embodiment, a method provides a bipolar junction transistor that is coupled to a first power supply. A second power supply is utilized to turn on the bipolar junction transistor. And, the bipolar junction transistor is overdriven.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: March 16, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Donald W. Schulte, Terry McMahon, David Douglas Hall
  • Patent number: 7669314
    Abstract: Methods for fabricating a printhead are described. In one embodiment, a method includes forming on a substrate using a single fabrication technique multiple resistors, some of the resistors to be used as heater resistors configured to eject fluid and some of the resistors to be used as storage resistors that store data, annealing the heater resistors, and intentionally not annealing at least one of the storage resistors, wherein the annealed storage resistors have a first state representing a first digital value and the unannealed storage resistors have a second state representing a second digital value, such that the values associated with the storage resistors can be read by an appropriate detection circuit.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: March 2, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: James A Feinn, Lawrence White, Satya Prakash, Donald W Schulte, Terry Mcmahon, Adam Ghozeil