Shouldn't their patent expire soon? I remember them actively issuing cease and desist letters to anyone who made code tutorials about how their algo works. [0]

Shouldn't their patent expire soon? I remember them actively issuing cease and desist letters to anyone who made code tutorials about how their algo works. [0] https://news.ycombinator.com/item?id=9594480 https://news.ycombinator.com/item?id=9594480