Patents by Inventor Franklin D. Derryberry

Franklin D. Derryberry 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).

  • Standpipe crossflow circulation
    Patent number: 10906320
    Abstract: A fluid ejection and circulation apparatus may include a fluid ejection die, the pressure regulator, a first standpipe, a second standpipe and a crossflow passage. The pressure regulator has a fluid chamber. The first standpipe is between the fluid chamber and the fluid ejection die. The first standpipe has a first port above the fluid ejection die. The second standpipe extends alongside the first standpipe. The second standpipe has a second port above the fluid ejection die. The crossflow passage connects the first standpipe and the second standpipe.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: February 2, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Benjamin H. Wood, Paul Mark Haines, Angela W. Bakkom, Anjan Prabhat Pattathil, Franklin D. Derryberry
  • STANDPIPE CROSSFLOW CIRCULATION
    Publication number: 20200346459
    Abstract: A fluid ejection and circulation apparatus may include a fluid ejection die, the pressure regulator, a first standpipe, a second standpipe and a crossflow passage. The pressure regulator has a fluid chamber. The first standpipe is between the fluid chamber and the fluid ejection die. The first standpipe has a first port above the fluid ejection die. The second standpipe extends alongside the first standpipe. The second standpipe has a second port above the fluid ejection die. The crossflow passage connects the first standpipe and the second standpipe.
    Type: Application
    Filed: April 30, 2019
    Publication date: November 5, 2020
    Inventors: Benjamin H. Wood, Paul Mark Haines, Angela W. Bakkom, Anjan Prabhat Pattathil, Franklin D. Derryberry