US Patent Issued to HOYA on June 17 for "Glass and optical element" (Japanese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,984, issued on June 17, was assigned to HOYA Corp. (Tokyo).

"Glass and optical element" was invented by Koichi Sato (Tokyo), Yoshitake Tanno (Tokyo) and Naomi Matsumoto (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is oxide glass in which a content of P5+ is 7 to 43 cation %, a content of Nb ions is 10 to 21 cation %, a content of Li+ is 20 cation % or more, a total content of Nb ions and Li+ is 48 to 70 cation %, a content of Bi ions is more than 0 cation % and is equal to or less than 6 cation %, a content of Ba2+ is 5 cation % or less, a content of Zr4+ is 2 cation % or less, a total content of Ti ions and W ions is 5 cation % or...