ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,804, issued on March 18, was assigned to SUMCO Corp. (Tokyo).
"Quartz glass crucible" was invented by Hiroshi Kishi (Akita, Japan), Kouta Hasebe (Akita, Japan), Takahiro Abe (Tokyo) and Hideki Fujiwara (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A quartz glass crucible 1 includes: a quartz glass crucible body 10 having a cylindrical side wall portion 10a, a curved bottom portion 10b, and a corner portion 10c which has a larger curvature than that of the bottom portion 10b and connects the side wall portion 10a and the bottom portion 10b to each other; and an inner-surface coating film 13A which contains a crystallization accelerator and i...