Patents Examined by Veronica F Faison Gee
  • Ink-jet inks containing sulfonated aromatic compounds for reducing ozone fade
    Patent number: 7976623
    Abstract: In accordance with embodiments of the present invention, an ink-jet ink can comprise a dye and a liquid vehicle carrying the dye. The liquid vehicle can include a sulfonated aromatic compound present in the ink-jet ink at an effective concentration to cause improvement of ozone fastness of said ink-jet ink.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: July 12, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Linda C Uhlir-Tsang, Marlene Ann McGorrin, John R Moffatt
  • Inkjet aqueous ink and printed item
    Patent number: 7955427
    Abstract: An inkjet aqueous ink that prevents paper deformation and exhibits superior print quality and latency. The inkjet aqueous ink contains not less than 15% by mass and not more than 40% by mass of a polyglycerol having an average polymerization degree of 4 or greater, not less than 5% by mass and not more than 20% by mass of at least one of 1,3-propanediol and diethylene glycol monoethyl ether, and not less than 40% by mass and not more than 60% by mass of water.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: June 7, 2011
    Assignee: Riso Kagaku Corporation
    Inventors: Akiko Hayashi, Yoshiaki Ishimaru