ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,419, issued on March 17, was assigned to KAO Corp. (Tokyo).
"Fine-metal-particle-containing ink" was invented by Tomohide Yoshida (Wakayama, Japan) and Kosuke Muto (Wakayama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A metallic fine particle-containing ink, including a metal constituting the metallic fine particles comprising silver, the metallic fine particles contained in the ink having a volume average particle diameter DA of 20 nm or more and 50 nm or less, and the metallic fine particles contained in the ink having a ratio (DA/LA) of the volume average particle diameter DA with respect to a crystallite size LA (nm) obtained from a (...