A decades-long legal dispute over ownership of Linux code has moved closer to resolution after a US Appeals Court upheld a lower court's ruling that claims against IBM and Red Hat by Xinuos — a successor to SCO — were invalid and time-barred. The case stems from a 1990s collaboration called "Project Monterey," in which IBM contributed code to Linux that SCO's successors argued was improperly licensed. Xinuos has indicated it plans to petition for the case to be reheard by the full Appeals Court bench, meaning the matter is not entirely over.