Patents by Inventor Katja Johanna Digweed

Katja Johanna Digweed 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).

  • INKJET PRINTER HAVING PRINTHEAD AND INK FOR MINIMIZING CORROSION OF EXPOSED CORRODIBLE STRUCTURES WITHIN PRINTHEAD
    Publication number: 20170218215
    Abstract: An inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure.
    Type: Application
    Filed: January 26, 2015
    Publication date: August 3, 2017
    Inventors: Simon Fielder, Michele Gimona, Katja Johanna Digweed, Channarayapatna Lakshmi
  • Inkjet printer having printhead and ink for minimizing corrosion of exposed corrodible structures within printhead
    Patent number: 9718979
    Abstract: An Inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: August 1, 2017
    Assignee: Memjet Technology Limited
    Inventors: Simone Fielder, Michele Gimona, Katja Johanna Digweed, Channarayapatna Lakshmi
  • Ink set for reducing printhead corrosion
    Patent number: 8939544
    Abstract: An ink set for an inkjet printer. The ink set includes an aqueous first ink comprising a first colorant and absent any potassium ions; and an aqueous second ink comprising a second colorant and potassium ions. The second aqueous ink comprises an AI(III) additive in an amount greater than the first ink.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: January 27, 2015
    Assignee: Memjet Technology Ltd.
    Inventors: Simon Fielder, Michele Gimona, Katja Johanna Digweed, Lakshmi Channarayapatna
  • INKJET PRINTER HAVING PRINTHEAD AND INK FOR MINIMIZING CORROSION OF EXPOSED CORRODIBLE STRUCTURES WITHIN PRINTHEAD
    Publication number: 20140253629
    Abstract: An inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 11, 2014
    Inventors: Simon Fielder, Michele Gimona, Katja Johanna Digweed, Lakshmi Channarayapatna
  • Inkjet printer having printhead and ink for minimizing corrosion of exposed corrodible structures within printhead
    Patent number: 8757779
    Abstract: An inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: June 24, 2014
    Assignee: ZAMTEC Ltd
    Inventors: Simon Fielder, Michele Gimona, Katja Johanna Digweed, Lakshmi Channarayapatna
  • INKJET PRINTER HAVING PRINTHEAD AND INK FOR MINIMIZING CORROSION OF EXPOSED CORRODIBLE STRUCTURES WITHIN PRINTHEAD
    Publication number: 20120287206
    Abstract: An inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure.
    Type: Application
    Filed: May 11, 2012
    Publication date: November 15, 2012
    Inventors: Simon Fielder, Michele Gimona, Katja Johanna Digweed, Lakshmi Channarayapatna
  • INKJET PRINTER HAVING PRINTHEAD AND INK FOR MINIMIZING CORROSION OF EXPOSED CORRODIBLE STRUCTURES WITHIN PRINTHEAD
    Publication number: 20120287207
    Abstract: An inkjet printer includes: an inkjet printhead having an exposed corrodible structure containing silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide; and an ink reservoir containing said ink which is in fluid communication with said printhead. The ink includes: water; a dye; and a metal additive for minimizing corrosion of the exposed structure.
    Type: Application
    Filed: May 11, 2012
    Publication date: November 15, 2012
    Inventors: Simon Fielder, Michele Gimona, Katja Johanna Digweed, Lakshmi Channarayapatna