Patents by Inventor Dun Liu

Dun Liu 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).

  • Patent number: 10821763
    Abstract: A method of roughening a surface of a printing form precursor. The method comprises subjecting at least a part of the surface to energy in the form of pulses of electromagnetic radiation to produce a uniformly hydrophilic roughened surface on at least a part of the printing form precursor and optionally converting the uniformly hydrophilic roughened surface of the printing form precursor to a uniformly hydrophobic roughened surface. The method is useful for providing a surface for use in a subsequent imaging and/or printing process in lithographic printing. Methods of providing a printing form comprising an image formed of hydrophobic regions and hydrophilic regions using said method and a method of printing using said method are also described, as are printing forms so produced and imaging devices and apparatus for carrying out the said methods.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: November 3, 2020
    Assignee: Shenzhen Zhong Chuang Green Plate Technology Co., Ltd.
    Inventors: John David Adamson, Peter Andrew Reath Bennett, Dun Liu
  • Publication number: 20180134059
    Abstract: A method of roughening a surface of a printing form precursor. The method comprises subjecting at least a part of the surface to energy in the form of pulses of electromagnetic radiation to produce a uniformly hydrophilic roughened surface on at least a part of the printing form precursor and optionally converting the uniformly hydrophilic roughened surface of the printing form precursor to a uniformly hydrophobic roughened surface. The method is useful for providing a surface for use in a subsequent imaging and/or printing process in lithographic printing. Methods of providing a printing form comprising an image formed of hydrophobic regions and hydrophilic regions using said method and a method of printing using said method are also described, as are printing forms so produced and imaging devices and apparatus for carrying out the said methods.
    Type: Application
    Filed: May 26, 2016
    Publication date: May 17, 2018
    Inventors: John David Adamson, Peter Andrew Reath Bennett, Dun Liu
  • Patent number: 8589231
    Abstract: Methods, systems, and computer programs for categorizing the sensitivity of web pages are presented. In one method, a space of sensitive pages is identified based on the sensitivity categorization of a first plurality of web pages and a second plurality of web pages. The first plurality of web pages is obtained by performing search queries using known sensitive words, and the second plurality of web pages includes randomly selected web pages. Additionally, the method identifies a third plurality of web pages that includes web pages on or near the boundary between the space of sensitive pages and the space of non-sensitive pages. The space of sensitive pages is then redefined based on the sensitivity categorization of the first, second, and third pluralities of web pages. Once the space of sensitive pages is defined, the method is used to determine that a given web page is sensitive when the given web page is in the space of sensitive pages.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: November 19, 2013
    Assignee: Yahoo! Inc.
    Inventors: Dragomir Yankov, Suju Rajan, Scott J. Gaffney, Dun Liu, Wanlin Pang, Adwait Ratnaparkhi
  • Publication number: 20110184817
    Abstract: Methods, systems, and computer programs for categorizing the sensitivity of web pages are presented. In one method, a space of sensitive pages is identified based on the sensitivity categorization of a first plurality of web pages and a second plurality of web pages. The first plurality of web pages is obtained by performing search queries using known sensitive words, and the second plurality of web pages includes randomly selected web pages. Additionally, the method identifies a third plurality of web pages that includes web pages on or near the boundary between the space of sensitive pages and the space of non-sensitive pages. The space of sensitive pages is then redefined based on the sensitivity categorization of the first, second, and third pluralities of web pages. Once the space of sensitive pages is defined, the method is used to determine that a given web page is sensitive when the given web page is in the space of sensitive pages.
    Type: Application
    Filed: January 28, 2010
    Publication date: July 28, 2011
    Applicant: Yahoo!, Inc.
    Inventors: Dragomir Yankov, Suju Rajan, Scott J. Gaffney, Dun Liu, Wanlin Pang, Adwait Ratnaparkhi
  • Publication number: 20030184134
    Abstract: A chair has a base, a seat connected to the base by means of a cylinder, a seatback connected to the seat by a connecting element and a hanger adjustably connected to the connecting element, such that the user is able to readily hang garment on the hanger.
    Type: Application
    Filed: April 1, 2002
    Publication date: October 2, 2003
    Inventor: Da Dun Liu
  • Patent number: 6519795
    Abstract: A nursing bed has a lifting device mounted on the front frame so that the patient is still able to change the upper part of the body and a sliding device mounted between the mediate frame and the rear frame so that the rear frame is able to move sidewardly relative to the mediate frame of the nursing bed.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: February 18, 2003
    Assignee: Tung Tai Chuang Co., Ltd.
    Inventor: Da Dun Liu