US Patent Issued to HOYA on May 13 for "Near-infrared absorbing glass and near-infrared cutoff filter" (Japanese Inventors)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,146, issued on May 13, was assigned to HOYA Corp. (Tokyo).

"Near-infrared absorbing glass and near-infrared cutoff filter" was invented by Masashi Kaneko (Tokyo) and Yuki Shiota (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "The near-infrared absorbing glass contains at least, as constituent ions, P ions; Cu ions; O ions; one or more ions selected from the group consisting of Li ions, Na ions and K ions; and one or more ions selected from the group consisting of Mg ions, Ca ions, Sr ions and Ba ions, wherein, in a glass composition expressed in cation %, the content of Cu ions is 15.0 cation % or lower; the content of P ions is 55.0 cation % ...