In March 1990, NBC filed a lawsuit against Columbia and its then-new parent company Sony under the perception that the latter two parties were violating their joint pact. Columbia purchased the foreign video rights to Orion Pictures titles a month earlier. NBC alleged that they were unaware of this transaction and had become convinced that Columbia was forming their own video unit in strict defiance of the joint venture, which was set to expire in 1992. Sony/Columbia denied NBC's claims. As the lawsuit continued into 1991, General Electric, the parent of NBC and RCA, announced that it was divesting its interest in RCA/Columbia. In August 1991, General Electric sold its 50% share of the company to Sony Corporation, and the litigation officially ended with Sony renaming the company as Columbia TriStar Home Video. It was named Columbia TriStar Home Entertainment from April 2001 until a name change to Sony Pictures Home Entertainment in November 2004.