The United Paramount Network (UPN) was founded in 1995 as a joint venture between Chris-Craft Broadcasting, which operated the network, and Viacom, whose Paramount Television division supplied programming. Each company owned 50 percent apiece of UPN. In 2000, shortly after Viacom completed its merger with CBS, Viacom bought out Chris-Craft's remaining stake in the network. At the start of 2006, Viacom and CBS Corporation were split, with the latter gaining control of UPN. That same year CBS and Time Warner announced the merger of UPN and The WB to form The CW Television Network.
The logo was originally colored to show a yellow circle, a blue triangle, and a red square.
In 1998, the logo went silver.
Starting with this logo, the Paramount connections were de-emphasized and the network was exclusively and officially referred to as "UPN". This was the last UPN logo used before the network, as such, folded and was merged with The WB Network to form the present-day CW network.
Viacom, the new owners of the UPN, had plans to relaunch the United Paramount Network as simply the "Paramount Network" using a logo based on the Paramount Pictures logo which contained the triangle which had "P" for Paramount in the UPN logo, but those plans were abandoned after UPN affiliates complained it would've confused viewers and diminished viewership.
It won't be until 2018, when the Paramount Network will become an actual network.