 For 50 years , DuMont was the only major broadcast television network to cease operations , until CBS Corporation and Time Warner shut down two other struggling networks , UPN and The WB , in September 2006 to create The CW Television Network – whose schedule was originally composed largely of programs from both of its predecessor networks . 
 For 50 years , DuMont was the only major broadcast television network to cease operations , until CBS Corporation and Time Warner shut down two other struggling networks , UPN and The WB , in September 2006 to create The CW Television Network – whose schedule was originally composed largely of programs from both of its predecessor networks . 
Fir 50 yrs , DuMont was the only major broadcast television network to cease operations , till CBS Corporation and Time Warner shut dwn 2 other strugglin networks , UPN and The WB , in September 2006 to create The CW Television Network – whose schedule was originally composed largely of programs from both of its predecessor networks .