ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,660, issued on May 27, was assigned to SUMITOMO ELECTRIC HARDMETAL CORP. (Itami, Japan).
"Cemented carbide and cutting tool" was invented by Takahiro Yamakawa (Itami, Japan), Takato Yamanishi (Itami, Japan) and Masahito Hikiji (Itami, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cemented carbide comprising a first phase, a second phase and a third phase, wherein: the first phase consists of a plurality of tungsten carbide particles; the second phase consists of cobalt; the cobalt content C5 in the cemented carbide is 3% to 15%; the third phase consists of at least one element selected from the group consisting of titanium, tantalum, niobiu...