Patents by Inventor Curt Behrend

Curt Behrend 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).

  • Pen start up algorithm for black and color thermal ink-jet pens
    Patent number: 5455608
    Abstract: A process for start up of a thermal ink-jet printhead cartridge that includes a sequence of nozzle clearing procedures of increasing severity which are performed in sequence so long as some of the nozzles of the printhead fail to fire ink drops pursuant to ink firing pulses provided to the printhead or until all of the procedures have been performed.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: October 3, 1995
    Assignee: Hewlett-Packard Company
    Inventors: Lowell Stewart, Edward D. Davis, Irene Williams, Curt Behrend, Steven R. Card