The successful strategy of Chicago plaintiffs firm Niro, Scavone, Haller & Niro of representing patent-holding companies with strong infringement claims on a contingency basis has spawned many imitators.

The term “patent troll” was famously coined in reference to firm co-founder Ray Niro. But in the past few months the firm has been involved in such controversial situations that a question arises: Is this how a patent plaintiffs firm acts in middle age?