In the wake of Dow Chemical Co.’s acquisition of Rohm & Haas, the state Superior Court is considering whether a plaintiff alleging her husband’s brain cancer was caused by a chemical made by Rohm & Haas Co. can subpoena a Dow corporate designee to testify in a deposition.

During oral argument in the state Superior Court Wednesday, defense attorney Nancy J. Gellman of Conrad O’Brien said Dow is subject to Pennsylvania’s general jurisdiction, but the subpoena is directed to a nonparty in the Branham v. Rohm & Haas Co. litigation. “This case is involving a nonparty,” Gellman argued.