Patents by Inventor Seth Stephen Haddix

Seth Stephen Haddix 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).

  • Printing fluid circulation
    Patent number: 11807019
    Abstract: A printing fluid pen includes a plurality of fluid ports, a pressure regulator in fluid communication with a first fluid port, and a valve in fluid communication with a second fluid port. The first fluid port is to deliver printing fluid to a fluid ejection device, and the second fluid port is to direct printing fluid out of the pen. In response to negative pressure, the valve is to open to enable fluids within the pen to exit via the second port.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: November 7, 2023
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Ronald Albert Askeland, Blair A. Butler, Ronald J. Ender, Craig L. Malik, Daniel D. Dowell, Seth Stephen Haddix, Si-Lam J. Choy, Alexander Govyadinov
  • PRINTING FLUID CIRCULATION
    Publication number: 20220161568
    Abstract: An example printing fluid pen comprises a plurality of fluid ports, a pressure regulator in fluid communication with a first fluid port, and a valve in fluid communication with a second fluid port. The first fluid port is to deliver printing fluid to a fluid ejection device, and the second fluid port to direct printing fluid out of the pen. In response to negative pressure, the valve is to open to enable fluids within the pen to exit via the second port.
    Type: Application
    Filed: July 31, 2019
    Publication date: May 26, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Ronald Albert Askeland, Blair A. Butler, Ronald J. Ender, Craig L. Malik, Daniel D. Dowell, Seth Stephen Haddix, Si-lam J. Choy, Alexander Govyadinov