This is the same scumbag behaviour
used back in the 90s by Unisys with gif and Fraunhofer with mp3:
1. Patent an algorithm, protocol or format.
2. Let it leak into the wider world and let people start using it.
3. Wait in the shadows until the entire world has adopted it as a standard.
4. Suddenly leap out of the shadows and claim "oh BTW, we own that so all you people we've been letting use it for free now have to pay up or else"
This practice is deceptive, immoral and should be made illegal. Patents should be treated the same as trademarks; if you don't defend them right from the get-go, you lose them.
I hope the greedy bastards that do this shit die in a fucking fire.