ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,050, issued on Aug. 19, was assigned to SUMCO Corp. (Tokyo).
"Infrared transmissivity measurement method of quartz glass crucible" was invented by Ken Kitahara (Akita, Japan), Masanori Fukui (Akita, Japan), Hiroshi Kishi (Akita, Japan), Tomokazu Katano (Tokyo) and Eriko Kitahara (Akita, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An infrared transmissivity measurement method is for measuring an infrared transmissivity of a quartz glass crucible which includes a transparent layer made of quartz glass that does not contain bubbles, a bubble layer formed outside the transparent layer and made of quartz glass containing bubbles, and a semi-molt...