CytoSorbents Corporation (CTSO)

[techxen]

Patents were extended back in 2017 to include China, so there is the legal recourse.

"This composition of matter patent provides additional coverage of the Company’s base polymer system, and this and other U.S. and foreign patents in this family extend protection of CytoSorb and CytoSorbents’ core technologies into 2026 in the U.S. and into 2031 in China, Japan, Russia, and Australia."

https://cytosorbents.com/cytosorbents-strengthens-intellectual-property-portfolio-with-new-patents-issued-in-the-u-s-china-japan-russia-and-australia/