US Patent Issued to SUMITOMO METAL MINING on Oct. 7 for "Dark powder dispersion liquid, dark powder dispersion body and colored layer-attached base material" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,223, issued on Oct. 7, was assigned to SUMITOMO METAL MINING Co. LTD. (Tokyo).

"Dark powder dispersion liquid, dark powder dispersion body and colored layer-attached base material" was invented by Takafumi Ito (Isa, Japan), Keiichi Sato (Isa, Japan) and Mika Okada (Isa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A dark powder dispersion liquid including a dark pigment, composite tungsten oxide particles and a solid medium, wherein a mass ratio of the dark pigment to the composite tungsten oxide particles (mass of dark-colored pigment/mass of composite tungsten oxide fine particles) is 0.01 or more and 5 or less."

The patent was filed on Ap...