I was also wondering about this. I only remember two vaguely related mentions, both are from a bit later time and one of them turned out not to be NURBS but Bézier patches :)
- Curved surfaces in Quake 3: https://www.gamedeveloper.com/programming/implementing-curve...
- Rhino 3D support: https://www.rhino3d.com/features/nurbs/