How much time USCIS will take for SR request response?

I was in employer A when my petition approved in may-16 and H1B visa got stamped in Nov-16(was valid till June-18), then I got job in employer B in May-18 and they filled transfer and extension request with USCIS in Jan-18 and I got receipt number on 2nd Feb 2018 but the status of my case is still showing "case was received "at USCIS site after almost 9+ months.

Because of that my employer B raised the SR request on 2nd Nov-18 but still no response from USCIS.

could you please let me know whether USCIS will provide status on my SR request or USCIS will denied my VISA transfer request?

Thanks in Advance.