ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,415, issued on Aug. 19, was assigned to SEIKAGAKU Corp. (Tokyo).

"Method for improving storage stability" was invented by Iwao Yamaguchi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A submucosal injection material whose quality deterioration during a storage period is prevented is provided. It is a submucosal injection material, which contains hyaluronic acid, and to which a dye is added."

The patent was filed on Feb. 21, 2020, under Application No. 17/428,425.

*For further information, including images, charts and tables, please visit: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool...