The original incarnation of Viacom purchased Paramount in 1993, with the deal closing in March 1994; Viacom then merged its own group of five CBS- and NBC-affiliated stations to the PSG fold. Shortly afterward Viacom entered into a joint venture with Chris-Craft Industries, which owned several television stations as part of its United Television subsidiary, to launch the United Paramount Network (UPN). Five of PSG's original six stations, along with several acquisitions such as WSBK-TV in Boston, became charter affiliates of the network when UPN launched in January 1995. PSG sold off two of its original six stations as well; KRRT and WTXF were sold to other companies, with the latter becoming a Fox-owned station. To make up for the loss of its Philadelphia-owned station, PSG bought Philadelphia independent station WGBS-TV and renamed it to WPSG-TV, and moved the UPN affiliation there. The company eventually divested itself of the CBS and NBC stations it held and purchased more UPN affiliates as the 1990s continued.