US Patent Issued to Canon on Sept. 15 for "Aqueous ink, ink cartridge and ink jet recording method" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,735,587, issued on Sept. 15, was assigned to Canon K.K. (Tokyo).

"Aqueous ink, ink cartridge and ink jet recording method" was invented by Yoshiyuki Kaneko (Kanagawa, Japan), Mikio Sanada (Kanagawa, Japan), Yoshihisa Yamashita (Osaka, Japan), Junichi Sakai (Tokyo), Hideki Yamakami (Kanagawa, Japan) and Shoichi Takeda (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aqueous ink contains a titanium oxide particle, poly(acrylic acid) and potassium ions, in which the titanium oxide particle contains titanium oxide, at least part of the surface of the titanium oxide is covered with alumina and silica, and the poly(acrylic acid) content is ...