Theresa May has said that wants no role for the ECJ at all, anywhere, post Brexit.
Within the UK, perhaps, but courts are there to deal with issues in their jurisdictions. If the ECJ has jurisdiction over European patent disputes, then any country (EU or not) would have to go to the ECJ to lodge such a dispute. It's still got nothing to do with Brexit. If the UK wanted to lodge a protest about some US situation it might have to go to the US Supreme Court, that doens't mean that the Supreme Court has any jurisdiction over other unrelated UK issues.