GetResponse with "0" argument(s): "The operation has timed out

I have created a job that opens a webpage on our internal LAN. The webpage takes 4 to 5 minutes to complete it's process which is expected so I set a high timeout of 10 minutes.
 The powershell job seems to run fine but I always get an error for getresponse get This is the error
The corresponding line is '$response = $request.GetResponse()   '. Correct the script and reschedule the job. The error information returned by PowerShell is: 'Exception calling "GetResponse" with "0" argument(s): "The operation has timed out" 

Code:

$request =[System.Net.WebRequest]::Create("http://myinternalsite.com")
$request.timeout = 60000; # 10 Minutes
$response = $request.GetResponse()
$response.Close()