(StatNews) A member of the family that owns Purdue Pharma — which is being sued by more than 1,000 jurisdictions for its alleged role in seeding the opioid crisis with its pain medication OxyContin — has been awarded a patent for a treatment for opioid use disorder.

Dr. Richard Sackler is listed as one of six inventors on the patent, which was issued in January and was first reported Friday by the Financial Times. Critics told the FT that they were disturbed that the patent could enable Sackler to benefit financially from the addiction crisis that his family’s company is accused of fueling.

Purdue has denied the allegations in the lawsuits, which also target a range of other opioid painkiller manufacturers and distributors.