Patents by Inventor Tomoyuki AKAKI

Tomoyuki AKAKI 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 composition for aqueous ink ball point pen
    Patent number: 9873806
    Abstract: Provided are an ink composition for an aqueous ink ball point pen, which contains modified polyvinyl alcohol and at least one selected from boric acid and salts thereof, and an aqueous ink ball point pen charged with the ink composition, wherein the boric acid and the salts thereof are preferably at least one selected from boric acid, alkali metal salts of boric acid and ammonium salts of boric acid.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: January 23, 2018
    Assignee: MITSUBISHI PENCIL COMPANY, LIMITED
    Inventors: Yusuke Kobayashi, Noriko Sakane, Tomoyuki Akaki
  • INK COMPOSITION FOR AQUEOUS INK BALL POINT PEN
    Publication number: 20150093176
    Abstract: Provided are an ink composition for an aqueous ink ball point pen, which contains modified polyvinyl alcohol and at least one selected from boric acid and salts thereof, and an aqueous ink ball point pen charged with the ink composition, wherein the boric acid and the salts thereof are preferably at least one selected from boric acid, alkali metal salts of boric acid and ammonium salts of boric acid.
    Type: Application
    Filed: September 24, 2014
    Publication date: April 2, 2015
    Applicant: MITSUBISHI PENCIL COMPANY, LIMITED
    Inventors: Yusuke KOBAYASHI, Noriko SAKANE, Tomoyuki AKAKI