Pfizer has defeated an asbestos case involving a product made by a now-bankrupt subsidiary after a Maryland judge ruled that an exception to the shield that bankruptcy law provides to defendants doesn’t apply to the plaintiff’s case.

When Pfizer’s subsidiary Quigley Company, Inc., reorganized as part of its bankruptcy, all asbestos lawsuits against it now are channeled into an asbestos trust seeded initially with nearly $1 billion. But one plaintiff tried to argue that Pfizer Inc. was still liable in civil court by arguing Pfizer was the apparent manufacturer of a heat-resistant, refractory product known as Insulag that was designed, manufactured and sold by Quigley.