Patents by Inventor Gerald T. Kraus

Gerald T. Kraus 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).

  • Fine detail photoresist barrier
    Patent number: 6489084
    Abstract: The photoresist barrier layer of an inkjet printer printhead is processed to enable channels narrower than a predetermined width in the barrier layer to be created without blockage. Relatively large volumes of photoresist which form a wall of the channel are exposed to a partial exposure of electromagnetic radiation to yield a reduced concentration of photoresist barrier layer in the large volume.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: December 3, 2002
    Assignee: Hewlett-Packard Company
    Inventors: David Pidwerbecki, Gerald T. Kraus, Paul J. Benning, Diana D. Granger, Joe E. Stout
  • Fine detail photoresist barrier
    Patent number: 6161923
    Abstract: The photoresist barrier layer of an inkjet printer printhead is processed to enable channels narrower than a predetermined width in the barrier layer to be created without blockage. Relatively large volumes of photoresist which form a wall of the channel are exposed to a partial exposure of electomagnetic radiation to yield a reduced concentration of photoresist barrier layer in the large volume.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: December 19, 2000
    Assignee: Hewlett-Packard Company
    Inventors: David Pidwerbecki, Gerald T. Kraus, Paul J. Benning, Diana D. Granger, Joe E. Stout
  • Reduced size printhead for an inkjet printer
    Patent number: 6146915
    Abstract: A printhead for an inkjet print cartridge capable of generating low drop weight ink drops is produced by reducing the dimensions of the firing chamber. A thinner orifice plate is needed to reliably achieve the lower drop weight ink drops. To overcome the material strength limitations of such a thinner orifice plate, an annealing step in the manufacture of the printhead is employed to modify the material properties of the orifice plate. This improved process improves the print quality of printers and aids in the production handling properties of the orifice plate. Orifice plates having a thickness in the range of 25 .mu.m to 40 .mu.m are being produced.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: November 14, 2000
    Assignee: Hewlett-Packard Company
    Inventors: David Pidwerbecki, Cheryl A. MacLeod, Patrick V. Boyd, Vladek P. Kasperchik, Gerald T. Kraus
  • Reduced size printhead for an inkjet printer
    Patent number: 6145963
    Abstract: A printhead for an inkjet print cartridge capable of generating low drop weight ink drops is produced by reducing the dimensions of the firing chamber. A thinner orifice plate is needed to reliably achieve the lower drop weight ink drops. To overcome the material strength limitations of such a thinner orifice plate, an annealing step in the manufacture of the printhead is employed to modify the material properties of the orifice plate. This improved process improves the print quality of printers and aids in the production handling properties of the orifice plate. Orifice plates having a thickness in the range of 25 .mu.m to 40 .mu.m are being produced.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: November 14, 2000
    Assignee: Hewlett-Packard Company
    Inventors: David Pidwerbecki, Cheryl A. MacLeod, Patrick V. Boyd, Vladek P. Kasperchik, Gerald T. Kraus