Patents by Inventor Gary A. Holt, Jr.

Gary A. Holt, Jr. 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).

  • Nozzle members, compositions, and methods for micro-fluid ejection heads
    Patent number: 7954927
    Abstract: 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: Grant
    Filed: February 1, 2008
    Date of Patent: June 7, 2011
    Assignee: Lexmark International, Inc.
    Inventors: Brian C. Hart, Gary A. Holt, Jr., Melissa M. Waldeck, Sean T. Weaver, Gary R. Williams
  • Nozzle members, compositions and methods for micro-fluid ejection heads
    Patent number: 7364268
    Abstract: 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: Grant
    Filed: September 30, 2005
    Date of Patent: April 29, 2008
    Assignee: Lexmark International, Inc.
    Inventors: Brian C. Hart, Gary A. Holt, Jr., Melissa M. Waldeck, Sean T. Weaver, Gary R. Williams
  • Process for making a micro-fluid ejection head structure
    Patent number: 7169538
    Abstract: 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: Grant
    Filed: September 10, 2004
    Date of Patent: January 30, 2007
    Assignee: Lexmark International, Inc.
    Inventors: Craig M. Bertelsen, Brian C. Hart, Gary A. Holt, Jr., Gary R. Williams, Sean T. Weaver