Patents by Inventor Yong-seo Oh

Yong-seo Oh 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).

  • Ink ejecting method and ink-jet printhead utilizing the method
    Publication number: 20040145632
    Abstract: A method of ejecting ink from a ink-jet printhead includes filling a rear end of a nozzle with ink using a capillary force, the rear end of the nozzle being surrounded by a hydrophilic layer, forming an electric field directed toward an outlet of the nozzle on a front end of the nozzle, the front end of the nozzle being surrounded by a hydrophobic layer, varying a surface tension of ink to separate ink droplets having a predetermined volume from ink and to move the separated ink droplets within the front end of the nozzle toward the outlet of the nozzle, and ejecting the separated ink droplets through the outlet of the nozzle.
    Type: Application
    Filed: January 15, 2004
    Publication date: July 29, 2004
    Inventors: You-seop Lee, Suk-han Lee, Yong-seo Oh, Seung-joo Shin