ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,008, issued on Aug. 12, was assigned to SUMITOMO PHARMA Co. LTD. (Osaka, Japan) and RIKEN (Wako, Japan).

"Method for producing retinal tissue" was invented by Satoshi Ando (Kobe, Japan), Takao Kuroda (Kobe, Japan) and Yoshiki Sasai (Kobe, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a production method of a retinal cell or retinal tissue, including the following steps:(1) a first step of culturing mammalian pluripotent stem cells in the absence of a feeder cell for a period not exceeding 30 days in a medium comprising 1) a factor for maintaining an undifferentiated state and 2) an MEK inhibitor,(2) a second ste...